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151.发明授权公开(公告)号：US10234704B2
公开(公告)日：2019-03-19
申请号：US15695652
申请日：2017-09-05
Applicant: Fujitsu Optical Components Limited
Inventor： Iori Shirakawa
Abstract: An optical module includes: an optical modulator, a superimposing unit, an offset adding unit, a detector, and a bias controller. The optical modulator includes a first modulator to generate a first optical signal, a second modulator to generate a second optical signal and a phase shifter to provide a specified phase difference between the first optical signal and the second optical signal so as to generate a modulated optical signal. The superimposing unit superimposes a low frequency signal on a DC bias of the first modulator. The offset adding unit adds an offset to a DC bias of the second modulator. The detector detects a low frequency component from output light of the optical modulator. The bias controller controls a DC bias that is applied to the phase shifter based on the low frequency component detected by the detector.
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公开(公告)号：US20190058527A1
公开(公告)日：2019-02-21
申请号：US16029775
申请日：2018-07-09
Applicant: Fujitsu Optical Components Limited
Inventor： Ryou Okabe , Toru Matsuyama
IPC: H04B10/516
Abstract: An optical transmission apparatus and an optical transmission method are provided. In particular, an optical transmission apparatus is disclosed as being configured to add strength to a signal. The signal corresponds to a value that an input signal has, and the strength added to the signal is strength according to the value. The optical transmission apparatus is further configured to give delays to a plurality of signals that includes the signal and to convert the sum of the plurality of signals into an optical signal.
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公开(公告)号：US20190041577A1
公开(公告)日：2019-02-07
申请号：US16048753
申请日：2018-07-30
Applicant: Fujitsu Optical Components Limited
Inventor： Masaki Sugiyama
IPC: G02B6/12
Abstract: A tunable optical source includes a substrate, a light source disposed on the substrate, and a wavelength selecting element configured to select light of a specific wavelength as output light, from light emitted from the light source, in accordance with a control signal. On the substrate, a wavelength filter including multiple output ports and a photodetector are disposed. The wavelength filter is configured to receive a part of the output light and to output light beams to the respective output ports. The photodetector is configured to receive the light beam output from one of the output ports. The tunable optical source further includes an inspection waveguide connecting to the photodetector at one end, and an inspection light input unit for inputting inspection light provided at the other end of the inspection waveguide.
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公开(公告)号：US10122467B2
公开(公告)日：2018-11-06
申请号：US15409731
申请日：2017-01-19
Applicant: Fujitsu Optical Components Limited
Inventor： Hiroshi Nishimoto
IPC: H04B10/00 , H04B10/516 , G08C23/04 , H04B10/532 , H04B10/572
Abstract: An optical transmitter that transmits an optical signal includes a dither superimposing circuit configured to generate a dither signal, the dither signal being used to control an operation of the optical transmitter to output the optical signal, and a control circuit configured to control intermittent superimposition of the dither signal onto a target to be controlled.
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公开(公告)号：US10122464B2
公开(公告)日：2018-11-06
申请号：US15252447
申请日：2016-08-31
Applicant: Fujitsu Optical Components Limited
Inventor： Masaki Sugiyama
IPC: H04B10/00 , H04B10/50 , H04B10/516 , H05K1/02
Abstract: An optical module includes a substrate, a package, and a flexible substrate. The substrate is provided with an electrode. The package includes a housing fixed to the substrate, a receiving unit that optically demodulates a received optical signal to convert the optical signal into a reception electrical signal, an output terminal that is provided on a surface of the housing and outputs the reception electrical signal, an input terminal that is provided at a height from the substrate different from a height of the output terminal and receives a transmission electrical signal, and a transmitting unit that optically modulates the transmission electrical signal received from the input terminal and transmits an optical signal resulting from optical modulation. A flexible substrate has flexibility and includes a signal electrode that connects one of the output terminal and the input terminal to the electrode arranged on the substrate.
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Patent Agency Ranking
公开(公告)号：US10095080B2
公开(公告)日：2018-10-09
申请号：US15650222
申请日：2017-07-14
Applicant: Fujitsu Optical Components Limited
Inventor： Yasuhiro Ohmori , Yoshinobu Kubota , Masaharu Doi , Masaki Sugiyama
Abstract: An optical modulator includes an optical modulator chip configured to optically modulate an optical signal using an electrical signal input thereto; and a relay substrate configured to relay and couple the electrical signal to the optical modulator chip. The optical modulator chip includes a signal electrode and a ground electrode for the electrical signal, formed along a waveguide for the optical signal. One end of the optical modulator chip is arranged to face the relay substrate. An electrode connection portion coupling the electrical signal to the relay substrate by wire is provided at the one end. A distance between a tip of one end of the signal electrode in the electrode connection portion and the end of the optical modulator chip is less than a distance between a tip of an end of the ground electrode in the electrode connection portion and the end of the optical modulator chip.
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公开(公告)号：US10082683B2
公开(公告)日：2018-09-25
申请号：US15617478
申请日：2017-06-08
Applicant: Fujitsu Optical Components Limited
Inventor： Yoshihiko Yoshida , Masaharu Doi , Yoshinobu Kubota
CPC classification number: G02F1/0027 , G02F1/225 , G02F2001/212 , G02F2201/501
Abstract: An optical modulator includes: a ferroelectric substrate in which an input optical waveguide, a pair of branched optical waveguides, and an output optical waveguide are formed; a signal electrode that is formed in a vicinity of at least one of the pair of branched optical waveguides; a first protection member that is attached to an input end of the ferroelectric substrate in which the input optical waveguide is formed; and a second protection member that is attached to an output end of the ferroelectric substrate in which the output optical waveguide is formed. The first protection member and the second protection member have a Mohs hardness that is less than or equal to a Mohs hardness of the ferroelectric substrate, and are formed of a glass material that does not have a pyroelectric effect.
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公开(公告)号：US10044439B2
公开(公告)日：2018-08-07
申请号：US15723462
申请日：2017-10-03
Applicant: Fujitsu Optical Components Limited
Inventor： Masayuki Kurisu , Shuichi Yasuda
Abstract: An optical receiver includes a processor. The processor calculates first through fourth optical intensities that respectively indicate input optical intensities of in-phase component in the first polarization, quadrature component in the first polarization, in-phase component in the second polarization and quadrature component in the second polarization. The processor calculates polarization dependent intensity ratio and phase dependent intensity ratio based on the first through fourth optical intensities. The processor calculates an input optical intensity of a polarization multiplexed optical signal based on an optical intensity of one of the first through fourth amplifiers, the polarization dependent intensity ratio, and the phase dependent intensity ratio.
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公开(公告)号：US20180196714A1
公开(公告)日：2018-07-12
申请号：US15868048
申请日：2018-01-11
Applicant: Fujitsu Optical Components Limited
Inventor： Daisuke MATSUKAWA
Abstract: A processing device has a memory including a plurality of storage areas each storing a setting value and the correction frequency change unit. The correction frequency change unit is configured to decrease, when a frequency of correction by the error correction unit for a storage area that stores one of the setting values is changed to a high frequency, a frequency of correction by the error correction processing for one of the storage areas other than the storage area whose correction frequency is changed to a high frequency, and to increase, when a frequency of correction by the error correction unit for a storage area that stores one of the setting values is changed to a low frequency, a frequency of correction by the error correction processing for one of the storage areas other than the storage area whose correction frequency is changed to a low frequency.
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公开(公告)号：US10001693B2
公开(公告)日：2018-06-19
申请号：US15243126
申请日：2016-08-22
Applicant: Fujitsu Optical Components Limited
Inventor： Masaki Sugiyama , Akira Ishii , Norihisa Naganuma , Eiichi Kodera
IPC: G02F1/035 , G02F1/225 , H01S5/00 , H04B10/516 , G02F1/21
CPC classification number: G02F1/225 , G02F1/2255 , G02F2001/212 , H01S5/0085 , H04B10/516
Abstract: A light communication device further includes a rigid substrate, a package, and a flexible substrate. The rigid substrate includes a first terminal arranged on a surface thereof and a second terminal having a first hole opened at the surface. The package includes a third terminal and a fourth terminal being provided on a side wall thereof and being electrically coupled to a signal electrode and a ground electrode of the signal processor, respectively. The flexible substrate includes a fifth terminal and a sixth terminal being electrically coupled to the third terminal and the fourth terminal, respectively. The fifth terminal is electrically coupled to the first terminal on the surface, and the sixth terminal, with being placed into the first hole, is electrically coupled to the second terminal.
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