U.S. patent application number 16/484011 was filed with the patent office on 2021-07-08 for sector-shaped closely-packed laser.
The applicant listed for this patent is BWT Beijing Ltd.. Invention is credited to Rui Liu, Zongyuan Sun, Lei Xu, Juyun Zhao.
Application Number | 20210210925 16/484011 |
Document ID | / |
Family ID | 1000005524004 |
Filed Date | 2021-07-08 |
United States Patent
Application |
20210210925 |
Kind Code |
A1 |
Sun; Zongyuan ; et
al. |
July 8, 2021 |
SECTOR-SHAPED CLOSELY-PACKED LASER
Abstract
The present disclosure discloses a sector-shaped closely-packed
laser generator, comprising a module packaging unit and a
closely-packed output unit; the module packaging unit is provided
therein with a plurality of single-die modules, and each of the
single-die modules has a coupling optical fiber; the closely-packed
output unit is provided therein with a silicon wafer whose surface
has a plurality of V-shaped grooves, and the plurality of V-shaped
grooves are arranged into a sector shape; and the coupling optical
fibers of the single-die modules protrude from the module packaging
unit and enter the closely-packed output unit, and are arranged in
the V-shaped grooves after coating layers being stripped, to emit
laser lights in directions of the arrangement of the V-shaped
grooves. In the present application, the plurality of single-die
modules are collectively disposed in the module packaging unit, and
the coupling optical fibers of the single-die modules are led out
and arranged in the V-shaped grooves arranged in a sector shape,
which realizes the close arrangement of the coupling optical
fibers, obtains the effect of modularized and integrated packaging
of single die, and effectively reduces the volume of the laser
generator. Furthermore, by closely arranging the coupling optical
fibers in the V-shaped grooves arranged in a sector shape, the
present disclosure can control the light emitting direction of the
coupling optical fibers.
Inventors: |
Sun; Zongyuan; (Beijing,
CN) ; Liu; Rui; (Beijing, CN) ; Zhao;
Juyun; (Beijing, CN) ; Xu; Lei; (Beijing,
CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
BWT Beijing Ltd. |
Beijing |
|
CN |
|
|
Family ID: |
1000005524004 |
Appl. No.: |
16/484011 |
Filed: |
October 9, 2018 |
PCT Filed: |
October 9, 2018 |
PCT NO: |
PCT/CN2018/109433 |
371 Date: |
August 6, 2019 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
H01S 5/02469 20130101;
H01S 5/02326 20210101; H01S 5/4025 20130101; H01S 5/24 20130101;
H01S 5/02251 20210101; H01S 5/02253 20210101 |
International
Class: |
H01S 5/02251 20060101
H01S005/02251; H01S 5/024 20060101 H01S005/024; H01S 5/02253
20060101 H01S005/02253; H01S 5/40 20060101 H01S005/40 |
Foreign Application Data
Date |
Code |
Application Number |
Sep 29, 2018 |
CN |
201811149249.3 |
Claims
1. A sector-shaped closely-packed laser generator, wherein the
sector-shaped closely-packed laser generator comprises a module
packaging unit and a closely-packed output unit; the module
packaging unit is provided therein with a plurality of single-die
modules, and each of the single-die modules has a coupling optical
fiber; the closely-packed output unit is provided therein with a
silicon wafer whose surface has a plurality of V-shaped grooves,
and the plurality of V-shaped grooves are arranged into a sector
shape; and the coupling optical fibers of the single-die modules
protrude from the module packaging unit and enter the
closely-packed output unit, and are arranged in the V-shaped
grooves after coating layers being stripped, to emit laser lights
in directions of the arrangement of the V-shaped grooves.
2. The sector-shaped closely-packed laser generator according to
claim 1, wherein the single-die module further comprises: an
electrode, a die, a single-module heat sink and a fast-axis
collimating lens; the electrode electrically connects to the die;
the single-module heat sink is of a step shape, and a positioning
side rib is provided on one side of a first step of the
single-module heat sink; the die clings to the positioning side rib
and is mounted to the first step of the single-module heat sink,
and a front end face of the die aligns with a boundary between the
first step and a second step of the single-module heat sink; and
the fast-axis collimating lens is mounted in front of the die, and
the coupling optical fibers are configured to be aligned with the
fast-axis collimating lens.
3. The sector-shaped closely-packed laser generator according to
claim 2, wherein, in the single-die module, the die is fixed to the
single-module heat sink by sintering by using a metal solder.
4. The sector-shaped closely-packed laser generator according to
claim 2, wherein the plurality of single-die modules are
electrified and emit lights independently of each other.
5. The sector-shaped closely-packed laser generator according to
claim 2, wherein the plurality of single-die modules are disposed
side by side in the module packaging unit, and all of the
single-module heat sinks of the plurality of single-die modules are
adhesively fixed to an outer housing of the module packaging unit,
and respectively align with a rear end and a bottom of the outer
housing of the module packaging unit.
6. The sector-shaped closely-packed laser generator according to
claim 1, wherein the module packaging unit is provided with an
optical fiber mouthpiece, an optical fiber jacket is provided
between the optical fiber mouthpiece and the closely-packed output
unit, and the coupling optical fibers of the plurality of
single-die modules pass through the optical fiber mouthpiece and
the optical fiber jacket and protrude into the closely-packed
output unit.
7. The sector-shaped closely-packed laser generator according to
claim 1, wherein the coupling optical fibers are arranged in the
V-shaped grooves, and are fixed in the V-shaped grooves
adhesively.
8. The sector-shaped closely-packed laser generator according to
claim 1, wherein light-emitting end faces of the coupling optical
fibers are ground to be smooth.
9. The sector-shaped closely-packed laser generator according to
claim 1, wherein the V-shaped grooves are of a diverging shape, to
cause output lights of the coupling optical fibers to be diverging
lights; or, the V-shaped grooves are of a converging shape, to
cause output lights of the coupling optical fibers to be converging
lights.
10. The sector-shaped closely-packed laser generator according to
claim 1, wherein angles between the V-shaped grooves are equal; or,
angles between the V-shaped grooves are configured to be gradually
changing angles.
Description
TECHNICAL FIELD
[0001] The present disclosure relates to the technical field of
laser generators, and particularly relates to a sector-shaped
closely-packed laser generator.
BACKGROUND
[0002] Because of the advantages such as the small volume, light
weight and high efficiency, semiconductor laser generators have
been the hot spot in the art of laser since their creation. The
techniques for packaging semiconductor laser generators mostly
develop and evolve on the basis of the techniques for packaging
discrete devices, to realize and ensure the functions of the dies
of working normally and outputting visible light. Along with the
continuous upgrading of industry, demands of people increasingly
grow, and the outputting and packaging form of single die in
semiconductor laser generators cannot satisfy the usage demands at
present. That is because the simple superposing of single die
packaging cannot achieve the object of light weight and
miniaturization, and the light emitting directions of the
traditional single die packaging superposing solution are not
diversified, which limits the popularization and application of new
products of laser generators.
SUMMARY
[0003] In view of the problem that the laser generators in the
prior art cannot be light weight and minimized, the present
disclosure provides a sector-shaped closely-packed laser generator,
to solve the above problem or at least partly solve the above
problem.
[0004] In order to realize the above object, the present disclosure
employs the following technical solution:
[0005] a sector-shaped closely-packed laser generator comprises a
module packaging unit and a closely-packed output unit; the module
packaging unit is provided therein with a plurality of single-die
modules, and each of the single-die modules has a coupling optical
fiber; the closely-packed output unit is provided therein with a
silicon wafer whose surface has a plurality of V-shaped grooves,
and the plurality of V-shaped grooves are arranged into a sector
shape; and the coupling optical fibers of the single-die modules
protrude from the module packaging unit and enter the
closely-packed output unit, and are arranged in the V-shaped
grooves after coating layers being stripped, to emit laser lights
in directions of the arrangement of the V-shaped grooves.
[0006] Optionally, the single-die module further comprises: an
electrode, a die, a single-module heat sink and a fast-axis
collimating lens; the electrode electrically connects to the die;
the single-module heat sink is of a step shape, and a positioning
side rib is provided on one side of a first step of the
single-module heat sink; the die clings to the positioning side rib
and is mounted to the first step of the single-module heat sink,
and a front end face of the die aligns with a boundary between the
first step and a second step of the single-module heat sink; and
the fast-axis collimating lens is mounted in front of the die, and
the coupling optical fibers are configured to be aligned with the
fast-axis collimating lens.
[0007] Optionally, in the single-die module, the die is fixed to
the single-module heat sink by sintering by using a metal
solder.
[0008] Optionally, the plurality of single-die modules are
electrified and emit lights independently of each other.
[0009] Optionally, the plurality of single-die modules are disposed
side by side in the module packaging unit, and all of the
single-module heat sinks of the plurality of single-die modules are
adhesively fixed to an outer housing of the module packaging unit,
and respectively align with a rear end and a bottom of the outer
housing of the module packaging unit.
[0010] Optionally, the module packaging unit is provided with an
optical fiber mouthpiece, an optical fiber jacket is provided
between the optical fiber mouthpiece and the closely-packed output
unit, and the coupling optical fibers of the plurality of
single-die modules pass through the optical fiber mouthpiece and
the optical fiber jacket and protrude into the closely-packed
output unit.
[0011] Optionally, the coupling optical fibers are arranged in the
V-shaped grooves, and are fixed in the V-shaped grooves
adhesively.
[0012] Optionally, light-emitting end faces of the coupling optical
fibers are ground to be smooth.
[0013] Optionally, the V-shaped grooves are of a diverging shape,
to cause output lights of the coupling optical fibers to be
diverging lights; or, the V-shaped grooves are of a converging
shape, to cause output lights of the coupling optical fibers to be
converging lights.
[0014] Optionally, angles between the V-shaped grooves are equal;
or, angles between the V-shaped grooves are configured to be
gradually changing angles.
[0015] In conclusion, the advantageous effects of the present
disclosure are:
[0016] The plurality of single-die modules are collectively
disposed in the module packaging unit, and the coupling optical
fibers of the single-die modules are led out and arranged in the
V-shaped grooves arranged in a sector shape, which realizes the
close arrangement of the coupling optical fibers, obtains the
effect of modularized and integrated packaging of single die, and
effectively reduces the volume of the laser generator. Furthermore,
by closely arranging the coupling optical fibers in the V-shaped
grooves arranged in a sector shape, the present disclosure can
control the light emitting direction of the coupling optical
fibers.
BRIEF DESCRIPTION OF DRAWINGS
[0017] FIG. 1 is a schematic diagram of the overall structure of an
embodiment of a sector-shaped closely-packed laser generator of the
present disclosure;
[0018] FIG. 2 is a schematic structural diagram of a single-die
module of an embodiment of a sector-shaped closely-packed laser
generator of the present disclosure;
[0019] FIG. 3 is a schematic structural diagram of a module
packaging unit of an embodiment of a sector-shaped closely-packed
laser generator of the present disclosure;
[0020] FIG. 4 is a schematic structural diagram of a converging
light closely-packed output unit of an embodiment of a
sector-shaped closely-packed laser generator of the present
disclosure; and
[0021] FIG. 5 is a schematic structural diagram of a diverging
light closely-packed output unit of an embodiment of a
sector-shaped closely-packed laser generator of the present
disclosure;
[0022] in the drawings: 101. module packaging unit; 102.
closely-packed output unit; 21. electrode; 22. single-module heat
sink; 23. die; 24. fast-axis collimating lens; 25. coupling optical
fibers; 26. positioning side rib; 31. lower housing of module
packaging unit; 32. optical fiber mouthpiece; 33. optical fiber
jacket; 41. lower housing of closely-packed output unit; 42.
silicon wafer; and 43. V-shaped grooves.
DETAILED DESCRIPTION
[0023] In order to make the objects, the technical solutions and
the advantages of the present disclosure clearer, the embodiments
of the present disclosure will be described below in further detail
in conjunction with the drawings.
[0024] In the description of the present application, it should be
noted that, the terms that indicate orientation or position
relations, such as "central", "upper", "lower", "left", "right",
"vertical", "horizontal", "inner" and "outer", are based on the
orientation or position relations shown in the drawings, and are
merely for conveniently describing the present disclosure and
simplifying the description, rather than indicating or implying
that the device or element must have the specific orientation and
be constructed or operated according to the specific orientation.
Therefore, they should not be construed as a limitation on the
present application. Furthermore, the terms "first", "second" and
"third" are merely used for the purpose of describing, and should
not be construed as indicating or implying the degree of
importance.
[0025] In the description of the present application, it should be
noted that, unless explicitly defined or limited otherwise, the
terms "install", "join" and "connect" should be interpreted
broadly. For example, it may be fixed connection, detachable
connection, or integral connection; it may be mechanical connection
or electrical connection; and it may be direct connection or
indirect connection by an intermediate medium, and may be the
internal communication between two elements. A person skilled in
the art can determine the particular meanings of the terms in the
present application concretely.
[0026] The technical concept of the present disclosure is: a
plurality of single-die modules are collectively disposed in a
module packaging unit, and the coupling optical fibers of the
single-die modules are led out and arranged in the V-shaped grooves
arranged in a sector shape, to realize the close arrangement of the
coupling optical fibers, obtain the technical effect of modularized
and integrated packaging of single die, and effectively reduce the
volume of the laser generator. Furthermore, by closely arranging
the coupling optical fibers in the V-shaped grooves arranged in a
sector shape, the present disclosure can control the light emitting
direction of the coupling optical fibers.
[0027] FIGS. 1 to 7 disclose an embodiment of a sector-shaped
closely-packed laser generator of the present application, wherein,
FIG. 1 is a schematic diagram of the overall structure of an
embodiment of a sector-shaped closely-packed laser generator of the
present disclosure, FIG. 2 is a schematic structural diagram of a
single-die module of an embodiment of a sector-shaped
closely-packed laser generator of the present disclosure, FIG. 3 is
a schematic structural diagram of a module packaging unit of an
embodiment of a sector-shaped closely-packed laser generator of the
present disclosure, FIG. 4 is a schematic structural diagram of a
converging light closely-packed output unit of an embodiment of a
sector-shaped closely-packed laser generator of the present
disclosure, and FIG. 5 is a schematic structural diagram of a
diverging light closely-packed output unit of an embodiment of a
sector-shaped closely-packed laser generator of the present
disclosure.
[0028] As shown in FIGS. 1 to 7, a sector-shaped closely-packed
laser generator comprises a module packaging unit 101 and a
closely-packed output unit 102. The module packaging unit 101 is
provided therein with a plurality of single-die modules (see FIG.
2), and each of the single-die modules has a coupling optical fiber
25. The closely-packed output unit 102 is provided therein with a
silicon wafer 42 whose surface has a plurality of V-shaped grooves
43 (see FIGS. 4 and 5), and the plurality of V-shaped grooves 43
are arranged into a sector shape. As shown in FIGS. 1,4 and 5, the
coupling optical fibers 25 of the single-die modules protrude from
the module packaging unit 101 and enter the closely-packed output
unit 102, and are arranged in the V-shaped grooves 43 after coating
layers being stripped, to emit laser lights in directions of the
arrangement of the V-shaped grooves 43.
[0029] Compared with the solution of single die packaging and
superposing, the modularized packaging has the advantages of
miniaturization and light weight. By parallelly arranging and
collectively packaging a plurality of dies, stripping the coating
layers on the outer side of the coupling optical fibers 25, and
closely arranging the coupling optical fibers 25 to output laser
lights, the laser light beams are more concentric, the volume of
the laser generator is more compact, and the weight is smaller.
Furthermore, the coupling optical fibers 25 are arranged in the
V-shaped grooves 43, which can realize light emitting by the laser
generator in the directions of the arrangement of the V-shaped
grooves 43, and can control the light emitting direction of the
laser generator. Because closely-arranged outputting is realized,
the present disclosure is not limited by the beam parameter product
(for short BPP, a parameter that describes the product of the size
and the angle of the light-emitting zone of a chip) of the die 23,
and can realize the multi-beam outputting of a plurality of
single-die modules.
[0030] As shown in FIG. 2, besides the coupling optical fibers 25,
the single-die module further comprises: an electrode 21, a die 23,
a single-module heat sink 22 and a fast-axis collimating lens
24.
[0031] The electrode 21 electrically connects to the die 23,
thereby electrifying the die 23 by using the electrode 21, to
excite the die 23 to emit light. The single-module heat sink 22 is
of a step shape, which facilitates positioning and mounting optical
elements such as the die 23, wherein the lengths of the steps are
determined according to the geometrical sizes and mounting
positions of the optical elements to be mounted. A positioning side
rib 26 is provided on one side of the first step of the
single-module heat sink 22, wherein the positioning side rib 26
serves as the positioning reference to facilitate the mounting and
positioning of the die 23. The die 23 clings to the positioning
side rib 26 and is mounted to the first step of the single-module
heat sink 22, and the front end face of the die 23 aligns with the
boundary between the first step and the second step of the
single-module heat sink 22.
[0032] The fast-axis collimating lens 24 is mounted in front of the
die 23. Because the divergence angle of the light beam emitted by
the die 23 is usually relatively large in the fast-axis direction
(40.about.60 degrees), which is quite greater than the divergence
angle in the slow-axis direction (6.about.12 degrees), the output
light beam of a single die 23 is required to be collimated only in
fast-axis. Particularly, by using a high-accuracy finely adjusting
rack and an adhesive, the fast-axis collimating lens (FAC) 24 is
mounted in front of the die 23, as shown in FIG. 2, to collimate
the light beam of the die 23 in the fast-axis direction, by
inspecting the position and size of the far-field facula of the
light beam, the collimation degree in the fast-axis direction is
observed, and after the collimation degree meets the requirement,
the fast-axis collimating lens is fixed on the die 23 by using a
solidifying glue.
[0033] The coupling optical fibers 25 are configured to be aligned
with the fast-axis collimating lens 24. In some embodiments of the
present application, the coupling optical fibers 25 are coupling
optical fibers having an end face lens, but they are not limited
thereto, and may also be coupled lens and optical fibers that are
coaxially packaged. In installation, by using a high-accuracy
finely adjusting rack and a glue, the optical path of the laser
lights is regulated entirely, the tail end of the coupling optical
fibers 25 connects to an integrating sphere (integrating sphere
refers to a hollow sphere whose inner wall is coated with a white
diffuse reflection material, which is also referred to as a
photometric sphere, a luminous flux sphere and so on, and can be
used to measure parameters such as optical efficiency and radiation
angle), and when the laser power reaches a certain numerical value,
the coupling optical fibers 25 are fixed by using the glue.
[0034] In the single-die module of the present embodiment, the die
23 is fixed to the single-module heat sink 22 by sintering by using
a metal solder, to ensure good thermal conduction, so that the
single-module heat sink 22 can quickly dissipate the heat generated
by the operation of the die 23.
[0035] In the present embodiment, the plurality of single-die
modules are electrified and emit lights independently of each
other; that is, each of the dies has the function of independent
controlling, which can enable the sector-shaped closely-packed
laser generator of the present application to output diversified
laser light beams.
[0036] In the present embodiment, the plurality of single-die
modules are disposed side by side in the module packaging unit 101,
and all of the single-module heat sinks 22 of the plurality of
single-die modules are adhesively fixed to an outer housing of the
module packaging unit 101, and respectively align with a rear end
and a bottom of the outer housing of the module packaging unit 101,
thereby ensuring that the plurality of single-die modules are
aligned side by side. As shown in FIG. 3, all of the single-module
heat sinks 22 of the plurality of single-die modules align with the
rear end of the lower housing 31 of the module packaging unit, and
cling to the bottom of the lower housing 31 of the module packaging
unit.
[0037] In the present embodiment, as shown in FIG. 3, the module
packaging unit 101 is provided with an optical fiber mouthpiece 32,
an optical fiber jacket 33 is provided between the optical fiber
mouthpiece 32 and the closely-packed output unit 102, and the
coupling optical fibers 25 of the plurality of single-die modules
pass through the optical fiber mouthpiece 32 and the optical fiber
jacket 33 and protrude into the closely-packed output unit 102. By
using the collective optical fiber mouthpiece 32 and optical fiber
jacket 33 to comb and integrate the plurality of coupling optical
fibers 25, the connection structure is tidy, and that has good
protecting function for the coupling optical fibers 25.
[0038] In that, the length of the coupling optical fibers 25 that
protrudes out of the optical fiber mouthpiece 32 is properly
tailored according to the requirement on for example the size of
the laser generator, to reserve a proper length for the
closely-arranged outputting of the optical fibers.
[0039] In the installation process of the present embodiment, as
shown in FIGS. 4 and 5, firstly the silicon wafer 42 is adhesively
connected to the lower housing 41 of the closely-packed output
unit, then the coating layers on the outer side of the coupling
optical fibers 25 are stripped, the coupling optical fibers 25 and
the silicon wafer 42 are cleaned up, and then the coupling optical
fibers 25 are arranged in the V-shaped grooves 43, and are fixed in
the V-shaped grooves 43 adhesively, thereby realizing the close
arrangement of the coupling optical fibers 25.
[0040] In the closely-packed output unit shown in FIG. 4 of the
present embodiment, the V-shaped grooves 43 are of a converging
shape, the V-shaped grooves 43 are arranged rightwardly in a
converging shape, the right ends of the V-shaped grooves 43 are
closely adjacent, and the neighboring V-shaped grooves form preset
angles .alpha. and .beta. therebetween, to cause the output lights
of the coupling optical fibers 25 to be converging lights. In that,
the angles .alpha. and .beta. between the neighboring V-shaped
grooves 43 are set according to the usage demands. The converging
laser lights have a further irradiation distance, which facilitates
improving the scanning distance of the sector-shaped closely-packed
laser generator, and improving the penetrating power of the laser
lights.
[0041] In the closely-packed output unit shown in FIG. 5 of the
present embodiment, the V-shaped grooves 43 are of a diverging
shape, the left ends of the V-shaped grooves 43 are closely
adjacent, the V-shaped grooves 43 are arranged rightwardly in a
diverging shape, and the neighboring V-shaped grooves form preset
angles .gamma. and .theta. therebetween, to cause the output lights
of the coupling optical fibers 25 to be diverging lights. In that,
the angles .gamma. and .theta. between the neighboring V-shaped
grooves 43 are set according to the usage demands. The diverging
laser lights have a larger irradiation area, which facilitates
improving the scanning speed of the sector-shaped closely-packed
laser generator.
[0042] In a preferable embodiment of the present application, after
the coupling optical fibers 25 are fixed within the V-shaped
grooves 43 adhesively, the light-emitting end faces of the coupling
optical fibers 25 are further required to be ground, to ensure the
tidiness of the light-emitting end faces, to further improve the
light emitting effect.
[0043] In the present embodiment, the angles between the V-shaped
grooves 43 are equal; or, the angles between the V-shaped grooves
43 are configured to be gradually changing angles, to enable the
V-shaped grooves 43 to contract or expand at a proper speed.
[0044] In the present embodiment, the quantity of the V-shaped
grooves 43 is greater than the quantity of the coupling optical
fibers 25. Therefore, the present disclosure may conveniently add
more single-die modules, and arrange more coupling optical fibers
25 in the redundant V-shaped grooves 43, to enhance the output
capability of the laser generator.
[0045] In the present embodiment, each of the outer housings of the
module packaging unit and of the closely-packed output unit
comprises a lower housing and an upper housing that are spliced,
wherein the lower housing and the upper housing are fixed
adhesively.
[0046] In the sector-shaped closely-packed laser generator of the
present application, each of the single-die modules is equivalent
to one complete single-die semiconductor laser generator. Because
in the present application, the dies are collectively packaged in
the sector-shaped closely-packed laser generator, and the coupling
optical fibers corresponding to the dies are closely-arranged
outputted by using the V-shaped grooves arranged in a sector shape,
so that the laser generator has smaller volume and weight, on the
basis of realizing multi-channel laser light emitting, the present
disclosure facilitates controlling the light emitting direction,
and realizing polydirectional light emitting. Furthermore, the
modularized packaging mode can be easily expanded, which
facilitates expanding to more channels of laser lights that are
simultaneously outputted.
[0047] The description above is merely particular embodiments of
the present disclosure. By the foregoing teachings of the present
disclosure, a person skilled in the art may make other improvements
or modifications based on the foregoing embodiments. A person
skilled in the art should understand that, the particular
description above is merely for better explaining the present
disclosure, and the protection scope of the present disclosure
should be subject to the protection scope of the claims.
* * * * *