| Patent | Date |
|---|
Delay interferometer using magneto-optic effect of a variable faraday rotator
Grant 8,711,359 - Fukushima April 29, 2 | 2014-04-29 |
Optical switch
Grant 8,331,744 - Furukawa , et al. December 11, 2 | 2012-12-11 |
Delay interferometer using magneto-optic effect
App 20110096338 - Fukushima; Nobuhiro | 2011-04-28 |
Wavelength dispersion compensation device
App 20100284076 - Shibata; Kohei ; et al. | 2010-11-11 |
Optical Switch
App 20100284648 - FURUKAWA; Hiroyuki ; et al. | 2010-11-11 |
Optical receiver corresponding to differential M-phase shift keying system
Grant 7,792,436 - Hoshida , et al. September 7, 2 | 2010-09-07 |
Polarization controlling apparatus and polarization operation apparatus
Grant 7,535,616 - Hironishi , et al. May 19, 2 | 2009-05-19 |
Optical element including dielectric multilayer film and manufacturing method thereof
App 20080107874 - Fukushima; Nobuhiro | 2008-05-08 |
Wavelength selection device
Grant 7,340,128 - Shibata , et al. March 4, 2 | 2008-03-04 |
Wavelength selective optical switch, and optical device provided with spectroscopic function
Grant 7,330,617 - Aota , et al. February 12, 2 | 2008-02-12 |
Polarization controlling apparatus and polarization operation apparatus
App 20070242340 - Hironishi; Kazuo ; et al. | 2007-10-18 |
Wavelength dispersion compensation device
App 20070236797 - Shibata; Kohei ; et al. | 2007-10-11 |
Wavelength selection device
App 20070153352 - Shibata; Kohei ; et al. | 2007-07-05 |
Wavelength selective optical switch, and optical device provided with spectrscopic function
App 20070077003 - Aota; Hirofumi ; et al. | 2007-04-05 |
Optical apparatus provided with demultiplexing function
Grant 7,171,084 - Izumi , et al. January 30, 2 | 2007-01-30 |
Optical receiver corresponding to differential M-phase shift keying system
App 20060222377 - Hoshida; Takeshi ; et al. | 2006-10-05 |
Variable optical filter
Grant 7,050,216 - Fukushima , et al. May 23, 2 | 2006-05-23 |
Optical communication system and optical communication method having confidentiality
Grant 6,999,655 - Fukushima February 14, 2 | 2006-02-14 |
Optical apparatus provided with demultiplexing function
App 20050194514 - Izumi, Hirotomo ; et al. | 2005-09-08 |
Optical communication system and optical communication method having confidentiality
App 20050158055 - Fukushima, Nobuhiro | 2005-07-21 |
Variable optical filter
App 20050134954 - Fukushima, Nobuhiro ; et al. | 2005-06-23 |
Magnetic field generator for optical devices utilizing magneto-optical effect
Grant 6,753,997 - Sasaki , et al. June 22, 2 | 2004-06-22 |
Tunable optical filter
Grant 6,717,730 - Terahara , et al. April 6, 2 | 2004-04-06 |
Variable optical attenuator which applies a magnetic field to a faraday element to rotate the polarization of a light signal
Grant 6,717,713 - Onaka , et al. April 6, 2 | 2004-04-06 |
Method of manufacturing optical filter
Grant 6,666,944 - Fukushima December 23, 2 | 2003-12-23 |
Variable optical attenuator which applies a magnetic field to a faraday element to rotate the polarization of a light signal
App 20030210451 - Onaka, Hiroshi ; et al. | 2003-11-13 |
Magnetic field generator for optical devices utilizing magneto-optical effect, and method of fabricating base substrate thereof
App 20030165002 - Sasaki, Seimi ; et al. | 2003-09-04 |
Variable optical attenuator which applies a magnetic field to a Faraday element to rotate the polarization of a light signal
Grant 6,570,699 - Onaka , et al. May 27, 2 | 2003-05-27 |
Tunable optical filter
App 20030016432 - Terahara, Takafumi ; et al. | 2003-01-23 |
Method of manufacturing optical filter
App 20020026981 - Fukushima, Nobuhiro | 2002-03-07 |
Variable optical attenuator which applies a magnetic field to a faraday element to rotate the polarization of a light signal
App 20020021484 - Onaka, Hiroshi ; et al. | 2002-02-21 |
Tunable optical filter
Grant 6,339,492 - Terahara , et al. January 15, 2 | 2002-01-15 |
Method of manufacturing optical filter
Grant 6,334,924 - Fukushima January 1, 2 | 2002-01-01 |
Extract of Touchi containing an .alpha.-glucosidase inhibitor
Grant 6,299,911 - Kawabata , et al. October 9, 2 | 2001-10-09 |
Faraday rotator
Grant 6,288,827 - Kawai , et al. September 11, 2 | 2001-09-11 |
Tunable optical filter
App 20010010593 - Terahara, Takafumi ; et al. | 2001-08-02 |
Optical connector which provides a disconnection state between two optical fibers where light is totally reflected at an end face of one fiber
Grant 6,048,102 - Fukushima April 11, 2 | 2000-04-11 |
Optical attenuator
Grant 6,018,412 - Fukushima January 25, 2 | 2000-01-25 |
Optical device which makes use of magneto-optical effect
Grant 5,999,305 - Fukushima December 7, 1 | 1999-12-07 |
Optical device having function of optical circulator
Grant 5,999,313 - Fukushima December 7, 1 | 1999-12-07 |
Optical device for wavelength monitoring and wavelength control
Grant 5,896,201 - Fukushima April 20, 1 | 1999-04-20 |
Optical attenuator
Grant 5,889,609 - Fukushima March 30, 1 | 1999-03-30 |
Faraday rotator which generates a uniform magnetic field in a magnetic optical element
Grant 5,812,304 - Shirasaki , et al. September 22, 1 | 1998-09-22 |
Polarizer housing device for connecting a polarizer to an optical waveguide
Grant 5,812,707 - Yamane , et al. September 22, 1 | 1998-09-22 |
Optical equalizer having variable transmittance versus wavelength characteristics for attenuating light
Grant 5,805,759 - Fukushima September 8, 1 | 1998-09-08 |
Optical device having an optical film with an incident angle thereupon variable
Grant 5,801,892 - Naganuma , et al. September 1, 1 | 1998-09-01 |
Optical-filter array, optical transmitter and optical transmission system
Grant 5,696,859 - Onaka , et al. December 9, 1 | 1997-12-09 |
Tunable optical filter having beam splitter and movable film filter
Grant 5,646,399 - Fukushima , et al. July 8, 1 | 1997-07-08 |
Optical band-pass filter having two pass bands
Grant 5,625,494 - Fukushima April 29, 1 | 1997-04-29 |
Optical fiber coupling device including lenses and magnetooptics
Grant 5,402,509 - Fukushima March 28, 1 | 1995-03-28 |
Duplicated light source module
Grant 5,291,571 - Kunikane , et al. March 1, 1 | 1994-03-01 |
Floating type magneto-optic disk reading head system having external semiconductor laser resonator operating at orthogonal two mode oscillations
Grant 4,955,006 - Fukushima , et al. September 4, 1 | 1990-09-04 |
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