U.S. patent application number 17/125547 was filed with the patent office on 2022-06-23 for optoelectronic assembly for a communication system.
The applicant listed for this patent is TE Connectivity Services GmbH. Invention is credited to Christopher William Blackburn, Nathan Lincoln Tracy.
Application Number | 20220196926 17/125547 |
Document ID | / |
Family ID | 1000006388495 |
Filed Date | 2022-06-23 |
United States Patent
Application |
20220196926 |
Kind Code |
A1 |
Blackburn; Christopher William ;
et al. |
June 23, 2022 |
OPTOELECTRONIC ASSEMBLY FOR A COMMUNICATION SYSTEM
Abstract
An optoelectronic assembly includes an optical module assembly
including a fiber optic connector and an optical engine on an
optical engine substrate. The fiber optic connector has a ferrule
holding optical fibers optically coupled to the optical engine. The
optical engine substrate includes a contact array of optical engine
contacts at a bottom of the optical engine substrate. The optical
module assembly includes a heat transfer element thermally coupled
to the optical engine. The optical module assembly includes a
backshell configured to be coupled to a circuit board. The
backshell holds the heat transfer element in thermal contact with
the optical engine. The optoelectronic assembly includes an
interposer assembly electrically connected to the contact array of
optical engine contacts having compressible interposer contacts
with separable mating interfaces.
Inventors: |
Blackburn; Christopher William;
(Bothell, WA) ; Tracy; Nathan Lincoln;
(Harrisburg, PA) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
TE Connectivity Services GmbH |
Schaffhausen |
|
CH |
|
|
Family ID: |
1000006388495 |
Appl. No.: |
17/125547 |
Filed: |
December 17, 2020 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
G02B 6/0083 20130101;
G02B 6/3894 20130101; G02B 6/3869 20130101 |
International
Class: |
G02B 6/38 20060101
G02B006/38; F21V 8/00 20060101 F21V008/00 |
Claims
1. An optoelectronic assembly comprising: an optical module
assembly including a fiber optic connector and an optical engine on
an optical engine substrate, the fiber optic connector having a
ferrule holding at least one optical fiber optically coupled to the
optical engine, the optical engine substrate including a contact
array of optical engine contacts at a bottom of the optical engine
substrate, the optical engine contacts being coupled to the optical
engine, the optical module assembly including a heat transfer
element thermally coupled to the optical engine, the optical module
assembly including a backshell configured to be coupled to a
circuit board, the backshell including a cavity holding the heat
transfer element, the optical engine and the optical engine
substrate, the backshell holding the heat transfer element in
thermal contact with the optical engine; and an interposer assembly
electrically connected to the contact array of optical engine
contacts, the interposer assembly including an array of interposer
contacts, the interposer contacts being compressible, each
interposer contact having an upper mating interface and a lower
mating interface, the upper mating interfaces defining separable
mating interfaces electrically connected to the corresponding
optical engine contacts, the lower mating interfaces of the
interposer contacts are configured to be electrically connected to
the circuit board.
2. The optoelectronic assembly of claim 1, wherein the backshell
compresses the interposer contacts when the backshell is coupled to
the circuit board.
3. The optoelectronic assembly of claim 1, wherein the optical
module assembly includes compression hardware configured to be
coupled to the circuit board, the compression hardware including
biasing elements pressing the backshell downward toward the circuit
board.
4. The optoelectronic assembly of claim 3, wherein the biasing
elements press the backshell downward against the heat transfer
element to press the heat transfer element against the optical
engine.
5. The optoelectronic assembly of claim 1, wherein the heat
transfer elements include a thermal interface engaging an upper
surface of the optical engine.
6. The optoelectronic assembly of claim 1, wherein the optical
engine substrate includes alignment features, the interposer
assembly including alignment features interfacing with the
alignment features of the optical engine substrate to orient the
optical engine contacts with the interposer contacts.
7. The optoelectronic assembly of claim 1, wherein the optical
engine includes an optical-electrical converter.
8. The optoelectronic assembly of claim 1, wherein the optical
module assembly further comprises a fiber strain relief member
providing strain relief for the at least one optical fiber, the
fiber strain relief member received in the cavity and coupled to
the optical engine substrate.
9. The optoelectronic assembly of claim 1, wherein the interposer
assembly includes an interposer frame received in the cavity, the
interposer frame being coupled to the optical engine substrate.
10. The optoelectronic assembly of claim 9, wherein the interposer
frame includes locating pins, the optical engine substrate
including alignment openings receiving the locating pins to orient
the interposer assembly with respect to the optical engine
substrate.
11. The optoelectronic assembly of claim 1, further comprising a
bolster plate configured to be coupled to a lower surface of the
circuit board, the backshell being coupled to the bolster plate
using mounting hardware, the circuit board being captured between
the bolster plate and the backshell.
12. The optoelectronic assembly of claim 1, wherein the heat
transfer element includes a thermal bridge having a plurality of
plates arranged in a plate stack, the plates being independently
movable to conform to the optical engine.
13. The optoelectronic assembly of claim 1, wherein the heat
transfer element includes heat transfer fins having airflow
channels therebetween.
14. The optoelectronic assembly of claim 1, wherein the backshell
includes heat transfer fins extending from an exterior surface of
the backshell, the heat transfer fins having airflow channels
therebetween.
15. An optoelectronic assembly comprising: a circuit board having
board contacts at a mounting area on an upper surface of the
circuit board, the mounting area having alignment openings; an
interposer assembly coupled to the circuit board at the mounting
area, the interposer assembly including an array of interposer
contacts held together by a support plate, the support plate and
the interposer contacts being held by an interposer frame, the
interposer frame including locating pins received in the alignment
openings to align the interposer assembly with the circuit board,
the interposer contacts being compressible, each interposer contact
having an upper mating interface and a lower mating interface, the
upper mating interfaces defining separable mating interfaces, the
lower mating interfaces of the interposer contacts being
electrically connected to the corresponding board contacts of the
circuit board; and an optical module assembly coupled to the
interposer assembly, the optical module assembly including a fiber
optic connector and an optical engine on an optical engine
substrate, the fiber optic connector having a ferrule holding at
least one optical fiber optically coupled to the optical engine,
the optical engine substrate including a contact array of optical
engine contacts at a bottom of the optical engine substrate, the
optical engine contacts being coupled to the optical engine, the
optical engine contacts being coupled to the corresponding
interposer contacts at a separable mating interface, the optical
module assembly including a heat transfer element thermally coupled
to the optical engine, the optical module assembly including a
backshell coupled to the circuit board, the backshell including a
cavity holding the heat transfer element, the optical engine and
the optical engine substrate, the backshell holding the heat
transfer element in thermal contact with the optical engine.
16. The optoelectronic assembly of claim 15, wherein the optical
module assembly includes compression hardware configured to be
coupled to the circuit board, the compression hardware including
biasing elements pressing the backshell downward toward the circuit
board, the biasing elements pressing the backshell downward against
the heat transfer element to press the heat transfer element
against the optical engine.
17. The optoelectronic assembly of claim 15, wherein the optical
engine substrate includes alignment features, the interposer
assembly including alignment features interfacing with the
alignment features of the optical engine substrate to orient the
optical engine contacts with the interposer contacts.
18. A communication system comprising: a circuit board having an
electronic package on the circuit board, the electronic package
being electrically connected to the circuit board, the circuit
board having mounting areas on an upper surface of the circuit
board adjacent the electronic package, each mounting area including
board contacts, the mounting area having alignment openings, the
mounting area having mounting openings; interposer assemblies
coupled to the circuit board at the corresponding mounting areas,
each interposer assembly including an array of interposer contacts
held together by a support plate, the support plate and the
interposer contacts being held by an interposer frame, the
interposer frame including locating pins received in the alignment
openings to align the interposer assembly with the circuit board,
the interposer contacts being compressible, each interposer contact
having an upper mating interface and a lower mating interface, the
upper mating interfaces defining separable mating interfaces, the
lower mating interfaces of the interposer contacts being
electrically connected to the corresponding board contacts of the
circuit board; and optical module assemblies coupled to the
corresponding interposer assemblies, each optical module assembly
including a fiber optic connector and an optical engine on an
optical engine substrate, the fiber optic connector having a
ferrule holding at least one optical fiber optically coupled to the
optical engine, the optical engine substrate including a contact
array of optical engine contacts at a bottom of the optical engine
substrate, the optical engine contacts being coupled to the optical
engine, the optical engine contacts being coupled to the
corresponding interposer contacts at a separable mating interface,
the optical module assembly including a heat transfer element
thermally coupled to the optical engine, the optical module
assembly including a backshell coupled to the circuit board using
compression hardware received in the corresponding mounting
openings, the backshell including a cavity holding the heat
transfer element, the optical engine and the optical engine
substrate, the backshell holding the heat transfer element in
thermal contact with the optical engine.
19. The communication system of claim 18, wherein the mounting
areas surround the electronic package on multiple sides to position
the interposer assemblies and the optical module assemblies on
multiple sides of the electronic package.
20. The communication system of claim 18, further comprising a
bolster plate coupled to a lower surface of the circuit board, the
backshell being coupled to the bolster plate using mounting
hardware, the circuit board being captured between the bolster
plate and the backshell.
Description
BACKGROUND OF THE INVENTION
[0001] The subject matter herein relates generally to communication
systems.
[0002] There is an ongoing trend toward smaller, lighter, and
higher performance communication components and higher density
systems, such as for ethernet switches or other system components.
Typically, the system includes an electronic package coupled to a
circuit board, such as through a socket connector. Electrical
signals are routed between the electronic package and the circuit
board. The electrical signals are then routed along traces on the
circuit board to another component, such as a transceiver
connector. The long electrical paths through the host circuit board
reduce electrical performance of the system. Additionally, losses
are experienced between the connector interfaces and along the
electrical signal paths of the transceivers. Conventional systems
are struggling with meeting signal and power output from the
electronic package.
[0003] A need remains for a reliable communication system.
BRIEF DESCRIPTION OF THE INVENTION
[0004] In one embodiment, an optoelectronic assembly is provided.
The optoelectronic assembly includes an optical module assembly
including a fiber optic connector and an optical engine on an
optical engine substrate. The fiber optic connector has a ferrule
holding at least one optical fiber optically coupled to the optical
engine. The optical engine substrate includes a contact array of
optical engine contacts at a bottom of the optical engine
substrate. The optical engine contacts are coupled to the optical
engine. The optical module assembly includes a heat transfer
element thermally coupled to the optical engine. The optical module
assembly includes a backshell configured to be coupled to a circuit
board. The backshell includes a cavity holding the heat transfer
element, the optical engine, and the optical engine substrate. The
backshell holds the heat transfer element in thermal contact with
the optical engine. The optoelectronic assembly includes an
interposer assembly electrically connected to the contact array of
optical engine contacts. The interposer assembly includes an array
of interposer contacts. The interposer contacts are compressible.
Each interposer contact has an upper mating interface and a lower
mating interface. The optoelectronic assembly includes separable
mating interfaces electrically connected to the corresponding
optical engine contacts. The lower mating interfaces of the
interposer contacts are configured to be electrically connected to
the circuit board.
[0005] In another embodiment an optoelectronic assembly is
provided. The optoelectronic assembly includes a circuit board
having board contacts at a mounting area on an upper surface of the
circuit board. The mounting area has alignment openings. The
optoelectronic assembly includes an interposer assembly coupled to
the circuit board at the mounting area. The interposer assembly
includes an array of interposer contacts held together by a support
plate. The support plate and the interposer contacts are held by an
interposer frame. The interposer frame includes locating pins
received in the alignment openings to align the interposer assembly
with the circuit board. The interposer contacts are compressible.
Each interposer contact has an upper mating interface and a lower
mating interface. The upper mating interfaces defining separable
mating interfaces. The lower mating interfaces of the interposer
contacts are electrically connected to the corresponding board
contacts of the circuit board. The optoelectronic assembly includes
an optical module assembly coupled to the interposer assembly. The
optical module assembly includes a fiber optic connector and an
optical engine on an optical engine substrate. The fiber optic
connector has a ferrule holding at least one optical fiber
optically coupled to the optical engine. The optical engine
substrate includes a contact array of optical engine contacts at a
bottom of the optical engine substrate. The optical engine contacts
are coupled to the optical engine. The optical engine contacts are
coupled to the corresponding interposer contacts at a separable
mating interface. The optical module assembly includes a heat
transfer element thermally coupled to the optical engine. The
optical module assembly includes a backshell coupled to the circuit
board. The backshell includes a cavity holding the heat transfer
element, the optical engine, and the optical engine substrate. The
backshell holds the heat transfer element in thermal contact with
the optical engine.
[0006] In a further embodiment, a communication system is provided.
The communication system includes a circuit board having an
electronic package on the circuit board. The electronic package is
electrically connected to the circuit board. The circuit board has
mounting areas on an upper surface of the circuit board adjacent
the electronic package. Each mounting area includes board contacts.
The mounting area has alignment openings. The mounting area has
mounting openings. The communication system includes interposer
assemblies coupled to the circuit board at the corresponding
mounting areas. Each interposer assembly includes an array of
interposer contacts held together by a support plate. The support
plate and the interposer contacts are held by an interposer frame.
The interposer frame includes locating pins received in the
alignment openings to align the interposer assembly with the
circuit board. The interposer contacts are compressible. Each
interposer contact has an upper mating interface and a lower mating
interface. The upper mating interfaces define separable mating
interfaces. The lower mating interfaces of the interposer contacts
are electrically connected to the corresponding board contacts of
the circuit board. The communication system includes optical module
assemblies coupled to the corresponding interposer assemblies. Each
optical module assembly includes a fiber optic connector and an
optical engine on an optical engine substrate. The fiber optic
connector has a ferrule holding at least one optical fiber
optically coupled to the optical engine. The optical engine
substrate includes a contact array of optical engine contacts at a
bottom of the optical engine substrate. The optical engine contacts
are coupled to the optical engine. The optical engine contacts are
coupled to the corresponding interposer contacts at a separable
mating interface. The optical module assembly includes a heat
transfer element thermally coupled to the optical engine. The
optical module assembly includes a backshell coupled to the circuit
board using compression hardware received in the corresponding
mounting openings. The backshell includes a cavity holding the heat
transfer element, the optical engine, and the optical engine
substrate. The backshell holding the heat transfer element in
thermal contact with the optical engine.
BRIEF DESCRIPTION OF THE DRAWINGS
[0007] FIG. 1 is a top view of a communication system having an
optoelectronic assembly in accordance with an exemplary
embodiment.
[0008] FIG. 2 is an exploded, rear perspective view of the
optoelectronic assembly in accordance with an exemplary
embodiment.
[0009] FIG. 3 is an exploded, front perspective view of the
optoelectronic assembly in accordance with an exemplary
embodiment.
[0010] FIG. 4 is a top perspective view of the interposer assembly
in accordance with an exemplary embodiment.
[0011] FIG. 5 is a bottom perspective view of the interposer
assembly in accordance with an exemplary embodiment.
[0012] FIG. 6 is an exploded view of the optical module assembly in
accordance with an exemplary embodiment.
[0013] FIG. 7 is a top perspective view of the optical module
assembly in accordance with an exemplary embodiment.
[0014] FIG. 8 is a bottom perspective view of the optical module
assembly in accordance with an exemplary embodiment.
[0015] FIG. 9 is a top view of the optical module assembly coupled
to the circuit board in accordance with an exemplary
embodiment.
[0016] FIG. 10 is an end view of the optical module assembly
coupled to the circuit board in accordance with an exemplary
embodiment.
[0017] FIG. 11 is a side view of the optical module assembly
coupled to the circuit board in accordance with an exemplary
embodiment.
DETAILED DESCRIPTION OF THE INVENTION
[0018] FIG. 1 is a top view of a communication system 100 having an
optoelectronic assembly 102 in accordance with an exemplary
embodiment. The optoelectronic assembly 102 includes one or more
optical module assemblies 104 electrically connected to a circuit
board 110 by interposer assemblies 108 (shown in FIG. 2). An
electronic package 106 is electrically connected to the circuit
board 110. In an exemplary embodiment, compression hardware is used
to load the optical module assemblies 104 against the interposer
assemblies 108 to electrically connect the optical module
assemblies 104 to the interposer assemblies 108 and to electrically
connect the interposer assemblies 108 to the circuit board 110. For
example, compression hardware, such as spring loaded threaded
fasteners, may be coupled to bolster plates or other support
structures below the circuit board 110. In an exemplary embodiment,
the communication system 100 includes a heat sink (not shown)
provided to dissipate heat from the electronic package 106 and/or
the optical module assemblies 104.
[0019] In various embodiments, the electronic package 106 may be an
integrated circuit assembly, such as an ASIC. However, the
electronic package 106 may be another type of communication
component. The electronic package 106 may be mounted to a host
circuit board, such as the circuit board 110. In other various
embodiments, the circuit board 110 may be a package substrate,
which may be coupled to a host circuit board (not shown).
Optionally, the optical module assemblies 104 may be provided on
multiple sides of the circuit board 110. In the illustrated
embodiment, the optical module assemblies 104 are provided on
multiple sides of the electronic package 106, such as on all four
sides of the electronic package 106. Other arrangements are
possible in alternative embodiments. In various embodiments, the
optical module assemblies 104 are individually clamped or
compressed against the interposer assemblies 108 and are thus
individually serviceable and removable from the circuit board
110.
[0020] FIG. 2 is an exploded, rear perspective view of the
optoelectronic assembly 102 in accordance with an exemplary
embodiment. FIG. 3 is an exploded, front perspective view of the
optoelectronic assembly 102 in accordance with an exemplary
embodiment. The optoelectronic assembly 102 includes the optical
module assembly 104 and the interposer assembly 108. The interposer
assembly 108 is used to electrically connect the optical module
assembly 104 to the circuit board 110. The optoelectronic assembly
102 includes a bolster plate 112 used to secure the optical module
assembly 104 to the circuit board 110.
[0021] The circuit board 110 includes a mounting area 114 on an
upper surface 116 of the circuit board 110. The mounting area 114
may be located adjacent the electronic package 106 (shown in FIG.
1). The circuit board 110 includes board contacts 120 at the
mounting area 114. The board contacts 120 are arranged in an array,
such as in rows and columns. The board contacts 120 may be pads or
traces of the circuit board 110. The board contacts 120 may be high
speed signal contacts, sideband signal contacts, ground contacts,
or power contacts. In an exemplary embodiment, the circuit board
110 includes alignment openings 122 adjacent the mounting area 114.
The interposer assembly 108 is coupled to the alignment openings
122 to orient the interposer assembly 108 relative to the circuit
board 110. The alignment openings 122 may be keyed, such as being
differently sized, to orient the interposer assembly 108 relative
to the circuit board 110. In an exemplary embodiment, the circuit
board includes mounting openings 124 adjacent the mounting area
114. The optical module assembly 104 and/or the bolster plate 112
is coupled to the circuit board 110 at the mounting openings
124.
[0022] The bolster plate 112 is configured to be coupled to a lower
surface 118 of the circuit board 110. The bolster plate 112
includes a main body 130 and embossments 132 extending from a top
of the main body 130. The embossments 132 are received in the
mounting openings 124. In the illustrated embodiment, the
embossments 132 are cylindrical. The embossments 132 may have other
shapes in alternative embodiments. The embossments 132 may have
different sizes or different shapes for keyed mating with the
circuit board 110. In an exemplary embodiment, the embossments 132
have bores 134 extending therethrough. The bores 134 may be
threaded to receive threaded fasteners of the optical module
assembly 104.
[0023] FIG. 4 is a top perspective view of the interposer assembly
108 in accordance with an exemplary embodiment. FIG. 5 is a bottom
perspective view of the interposer assembly 108 in accordance with
an exemplary embodiment. The interposer assembly 108 includes an
array of interposer contacts 200 held together by a support plate
202. The interposer assembly 108 includes an interposer frame 204
holding the support plate 202 and the interposer contacts 200.
[0024] In an exemplary embodiment, the interposer frame 204 is a
multipiece frame having an upper frame member 206 and a lower frame
member 208. The support plate 202 is sandwiched between the upper
frame member 206 and the lower frame member 208. In the illustrated
embodiment, the interposer frame 204 extends around an outer
periphery of the interposer assembly 108, such as along all four
sides of the support plate 202. The interposer frame 204 may have
other shapes in alternative embodiments.
[0025] In an exemplary embodiment, the interposer frame 204
includes upper locating pins 212 and lower locating pins 214. The
upper locating pins 212 extend upward from the upper frame member
206. The upper locating pins 212 are used for locating the optical
module assembly 104 (shown in FIG. 2) relative to the interposer
assembly 108. The upper locating pins 212 are received in alignment
features, such as openings, of the optical module assembly 104 to
position the optical module assembly 104 relative to the interposer
frame 204 and the interposer contacts 200. The upper locating pins
212 may be held in the optical module assembly 104 by an
interference fit. Optionally, the upper locating pins 212 may be
different sizes or shapes for keyed mating with the optical module
assembly 104. The lower locating pins 214 extend downward from the
lower frame member 208. The lower locating pins 214 are used for
locating the interposer assembly 108 relative to the circuit board
110 (shown in FIG. 2). The lower locating pins 214 are received in
the alignment openings 122 to position the interposer frame 204 and
the interposer contacts 200 relative to the circuit board 110.
Other types of locating features other than the locating pins 212,
214 may be used in alternative embodiments. The lower locating pins
214 may be held in the alignment openings 122 by an interference
fit. Optionally, the lower locating pins 214 may be different sizes
or shapes for keyed mating with the alignment openings 122.
[0026] In an exemplary embodiment, the support plate 202 is a film
having an upper surface 220 and a lower surface 222. The support
plate 202 includes openings 224 therethrough holding corresponding
interposer contacts 200. The support plate 202 is manufactured from
an insulative material, such as a polyimide material, to
electrically isolate the interposer contacts 200 from one
another.
[0027] The interposer contacts 200 are held by the support plate
202. In an exemplary embodiment, the interposer contacts 200 are
compressible contacts, such as conductive polymer columns. Each
interposer contact 200 includes an upper mating interface 226 and a
lower mating interface 228. The upper mating interface 226 is
located above the upper surface 220 of the support plate 202 and
the lower mating interface 228 is located below the lower surface
222 of the support plate 202. The interposer contacts 200 are
compressible between the upper mating interfaces 226 and the lower
mating interfaces 228. Optionally, the upper and lower mating
interfaces 226, 228 may be planar interfaces oriented parallel to
each other. Optionally, upper and lower sides 230, 232 of the
interposer contacts 200 may be tapered. For example, the sides 230,
232 may be oriented nonparallel to the upper and lower mating
interfaces 226, 228. The upper and lower portions of the interposer
contacts 200 may be cone-shaped, such as being frusto-conical.
Other types of interposer contacts 200 may be utilized in
alternative embodiments.
[0028] FIG. 6 is an exploded view of the optical module assembly
104 in accordance with an exemplary embodiment. The optical module
assembly 104 includes a fiber optic connector 300, an optical
engine 302 on an optical engine substrate 304, a heat transfer
element 306 thermally coupled to the optical engine 302, and a
backshell 308 that holds the other components together. The
backshell 308 is configured to be coupled to the circuit board 110
(shown in FIG. 2) using mounting hardware 310. In an exemplary
embodiment, the mounting hardware 310 is compression hardware
having biasing elements 312, such as springs, coupled to the
mounting hardware 310. The mounting hardware 310 is configured to
be threadably coupled to the bolster plate 112 (shown in FIG.
2).
[0029] The fiber optic connector 300 includes a ferrule 320 holding
at least one optical fiber 322. The fiber optic connector 300 is
configured to be coupled to the optical engine 302 such that the
optical fibers 322 are optically coupled to the optical engine 302.
In an exemplary embodiment, the fiber optic connector 300 includes
a fiber strain relief element 324. The fiber strain relief element
324 provides strain relief for the optical fibers 322. The fiber
strain relief element 324 may be overmolded over the optical fibers
322.
[0030] The optical engine 302 is coupled to the optical engine
substrate 304, such as at a top 330 of the optical engine substrate
304. The optical engine 302 includes an optical-electrical
converter 332 for converting between optical signals and electrical
signals. In an exemplary embodiment, the optical engine substrate
304 includes a contact array of optical engine contacts 334 (shown
in FIG. 8) at a bottom 335 of the optical engine substrate 304. The
optical engine contacts 334 are coupled to the optical engine 302.
The optical engine contacts 334 are configured to be coupled to the
interposer contacts 200 (shown in FIG. 4). The optical engine
contacts 334 may define a separable mating interface with the
interposer assembly 108. In an exemplary embodiment, the optical
engine substrate 304 includes alignment features 336 configured to
align the optical engine substrate 304 with the interposer assembly
108. For example, the alignment features 336 may be openings
through the optical engine substrate 304. The alignment features
336 receive the upper locating pins 212 (shown in FIG. 4) to orient
the optical engine substrate 304 with the interposer assembly 108.
The alignment features 336 may have different sizes for keyed
mating with the upper locating pins 212.
[0031] The heat transfer element 306 is configured to be thermally
coupled to the optical engine 302 to dissipate heat from the
optical engine 302. In an exemplary embodiment, the heat transfer
element 306 includes a thermal bridge. The heat transfer element
306 includes a stack of plates being individually movable relative
to each other to conform to the optical engine 302. The plates are
held together in a frame 340. In an exemplary embodiment, the heat
transfer element 306 may be a heat sink configured to be air
cooled. For example, the heat transfer element 306 may include heat
dissipating fins having airflow channels between the heat
dissipating fins. In other various embodiments, the heat transfer
element 306 may be thermally coupled to another component, such as
a liquid cooling module or another heat sink.
[0032] In an exemplary embodiment, the backshell 308 is
manufactured from a metal material. Optionally, the backshell 308
may be diecast. The backshell 308 includes a main body 350 forming
a cavity 352. The backshell 308 has an opening 360 at a top of the
backshell 308. The main body 350 surrounds the opening 360. The
cavity 352 receives the heat transfer element 306, the optical
engine 302, the optical engine substrate 304 and the fiber optic
connector 300. In an exemplary embodiment, the backshell 308
includes a ledge 354 surrounding the cavity 352. The ledge 354
captures the heat transfer element 306 and/or the optical engine
substrate 304. The ledge 354 may press downward against the heat
transfer element 306 and/or the optical engine substrate 304. The
backshell 308 includes mounting tabs 356 having openings 358. The
mounting tabs 356 may be mounted to the circuit board 110. The
openings 358 receive the mounting hardware 310. The biasing
elements 312 are coupled to the mounting tabs 356 and press
downward against the mounting tabs 356 to hold the heat transfer
element 306 in thermal contact with the optical engine 302. The
biasing elements 312 press downward against the mounting tabs 356
to compress the interposer contacts 200. In an exemplary
embodiment, the backshell 308 includes heat dissipating fins 362
having airflow channels 364 therebetween. The heat dissipating fins
360 dissipate heat from the backshell 308.
[0033] FIG. 7 is a top perspective view of the optical module
assembly 104 in accordance with an exemplary embodiment. FIG. 8 is
a bottom perspective view of the optical module assembly 104 in
accordance with an exemplary embodiment. FIGS. 7 and 8 illustrate
the optical module assembly 104 in an assembled state. The heat
transfer element 306, the optical engine 302, the optical engine
substrate 304 and the fiber optic connector 300 are received in the
cavity 352 of the backshell 308. The fiber optic connector 300
extends from the backshell 308. The heat transfer element 306
extends through the opening 360 to an exterior of the backshell
308.
[0034] In an exemplary embodiment, the backshell 308 includes an
opening 366 at a bottom 368 of the backshell 308. The optical
engine substrate 304 is exposed at the bottom 368 for interfacing
with the interposer assembly 108 (shown in FIG. 4). The optical
engine contacts 334 are provided at the bottom 335 of the optical
engine substrate 304. The optical engine contacts 334 may be pads
or traces of the optical engine substrate 304. The optical engine
contacts 334 are arranged in an array, such as in rows and columns.
The optical engine contacts 334 may be high speed signal contacts,
sideband signal contacts, ground contacts, and power contacts. In
an exemplary embodiment, a bottom portion of the cavity 352 is
configured to receive the interposer assembly 108 to mate with the
optical engine contacts 334.
[0035] FIG. 9 is a top view of the optical module assembly 104
coupled to the circuit board 110. FIG. 10 is an end view of the
optical module assembly 104 coupled to the circuit board 110. FIG.
11 is a side view of the optical module assembly 104 coupled to the
circuit board 110. The bolster plate 112 is located below the
circuit board 110. The optical module assembly 104 is coupled to
the top of the circuit board 110. The mounting hardware 310 passes
through the circuit board 110 to threadably couple to the bolster
plate 112. The biasing elements 312 are compressed as the mounting
hardware is tightened. The biasing elements 312 press downward
against the backshell 308 to press the backshell 308 downward
toward the circuit board 110. The biasing elements 312 press the
backshell 308 downward against the heat transfer element 306 to
press the heat transfer element 306 against the optical engine 302.
In an exemplary embodiment, the biasing elements 312 press the
backshell 308 downward to compress the interposer contacts 200
(shown in FIG. 4).
[0036] It is to be understood that the above description is
intended to be illustrative, and not restrictive. For example, the
above-described embodiments (and/or aspects thereof) may be used in
combination with each other. In addition, many modifications may be
made to adapt a particular situation or material to the teachings
of the invention without departing from its scope. Dimensions,
types of materials, orientations of the various components, and the
number and positions of the various components described herein are
intended to define parameters of certain embodiments, and are by no
means limiting and are merely exemplary embodiments. Many other
embodiments and modifications within the spirit and scope of the
claims will be apparent to those of skill in the art upon reviewing
the above description. The scope of the invention should,
therefore, be determined with reference to the appended claims,
along with the full scope of equivalents to which such claims are
entitled. In the appended claims, the terms "including" and "in
which" are used as the plain-English equivalents of the respective
terms "comprising" and "wherein." Moreover, in the following
claims, the terms "first," "second," and "third," etc. are used
merely as labels, and are not intended to impose numerical
requirements on their objects. Further, the limitations of the
following claims are not written in means-plus-function format and
are not intended to be interpreted based on 35 U.S.C. .sctn.
112(f), unless and until such claim limitations expressly use the
phrase "means for" followed by a statement of function void of
further structure.
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