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JP6363933B2 |
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JP6349696B2 |
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JP6353342B2 |
[Problem] To provide a method capable of easily compensating waveform distortion due to a non-linear effect caused by a complicated electric circuit, and a device for implementing the method. [Solution] Provided are a method capable of e...
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JP6346796B2 |
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JP6346803B2 |
An optical receiver circuit includes: a substrate; and an optical waveguide device that is formed on the substrate. The optical waveguide device includes: a first optical splitter section branching the signal light into a first signal li...
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JP6337960B2 |
A tunable laser source includes a mirror, a tunable filter, and a semiconductor optical amplifier integrated device including first, second, and third semiconductor optical amplifiers between a first end face facing toward the tunable fi...
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JP6331509B2 |
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JP6298654B2 |
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JP6295689B2 |
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JPWO2016143725A1 |
The coherent receiver 1 includes a housing 2, a first multimode interferator 40 including a first reference optical input unit 41 and a first signal optical input unit 42, a second reference optical input unit 51, and a second signal opt...
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JP6277660B2 |
An optical transceiver applicable to the coherent communication is disclosed. The optical transceiver includes a laser module, a transmitter module to output a transmitting signal by modulating a phase of an laser beam output from the la...
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JP2018006836A |
To provide a receiving device or the like capable of suppressing power consumption required for local light emission.A receiving device comprises a light source, a multiplexing part, a conversion part, a demodulation part, a correction p...
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JP6257098B2 |
According to one embodiment, a system for transmitting differential optical signals can include an optical modulation device, a multi-core optical waveguide, and a balanced optical receiver. The optical modulation device can include at l...
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JP6254543B2 |
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JP6244672B2 |
A light source module includes a single light source with two opposite light outputting faces, a first optical amplifier and a second optical amplifier provided on opposite sides of the light source adjacent to the corresponding light ou...
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JP6236894B2 |
An optical phase compensation device included in an optical receiver employing an intradyne detection method, includes a first optical phase error calculator configured to calculate a first optical phase error by averaging signal symbols...
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JP2017203900A |
To generate a two-tone signal having smaller frequency intervals with respect to frequency of an optical signal with a simple configuration.A two-tone signal generator for generating an optical two-tone signal using laser beams, comprise...
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JP6217120B2 |
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JP2017168545A |
To downsize an optical module by enabling compact mounting even when an etalon is mounted.The optical module is so configured that a variable wavelength laser is formed by an optical waveguide having a wavelength adjusting means and a li...
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JP6199995B2 |
An optical receiver having an optical IQ modulator configured to generate an optical local-oscillator (OLO) signal for optical homodyne detection of an optical input signal applied to the optical receiver. The optical receiver further ha...
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JP2017143485A |
To solve such a problem of an optical receiver using polarization separation that it is difficult to control the polarization state by simple configuration, without affecting the reception characteristics.An optical receiver has polariza...
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JP2017143332A |
To adjust the intensity of a local optical signal inputted to a coherent receiver appropriately.An optical receiver includes a coherent receiver 14. The coherent receiver 14 includes an X polarization hybrid 18X and a Y polarization hybr...
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JP6163109B2 |
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JP6156496B2 |
An optical reception apparatus (1) of the present invention includes: a local oscillator (11) outputting local oscillation light (22); an optical mixer (12) receiving a multiplexed optical signal (21) and the local oscillation light, and...
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JP6133236B2 |
To make it possible to obtain an optical frequency comb having a higher repetition frequency with high precision.An optical frequency comb stabilization light source makes a stabilization CW light generation unit 103 generate continuous ...
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JP6130527B1 |
[Subject] It aims at reducing the required number of the converter which performs light and electric signal transformation in the method of comparing the frequency difference of a lightwave signal. [Means for Solution] Optical oscillator...
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JP6128134B2 |
A frequency conversion device includes: an optical convertor configured to convert a source modulated light into an unmodulated light; and a frequency convertor configured to use the unmodulated light converted by the optical convertor a...
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JPWO2016043036A1 |
A light source (1) that emits light (101), a sawtooth generator (2) that generates a sawtooth wave (102), a frequency controller (4) that controls the frequency of the sawtooth wave (102), and a sawtooth wave. It is equipped with an opti...
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JP6103100B1 |
[Subject] Phase simulation is performed using a phase error signal which does not contain a high frequency component. [Means for Solution] Optical VCO20 which is lightwave signal demodulator 100 which restores to a lightwave signal by wh...
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JP6098596B2 |
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JPWO2015052937A1 |
The spectrum compressor (100) that performs spectral compression of the input optical signal includes a duplication unit (110) that generates at least two duplicate optical signals delayed at arbitrary time intervals by duplicating the i...
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JP2017032629A |
To provide an optical module capable of suppressing increase in a deviation of light intensity.The optical module includes an MMI coupler made of a semiconductor, an optical hybrid element including an optical waveguide made of a semicon...
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JPWO2014118836A1 |
Provided is an optical function integrated unit capable of easily integrating an active optical element and a passive optical element having a silicon waveguide, and a method for manufacturing the same. The optical function integrated un...
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JP6051792B2 |
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JP6053961B2 |
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JP6033121B2 |
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JP6032346B2 |
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JP6024169B2 |
In one embodiment, a first module of a server system modulates a common-source optical signal to generate a modulated optical data signal, transmits the modulated optical data signal to a second module of the server system via an optical...
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JP6008984B2 |
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JP6006053B2 |
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JP2016144197A |
To reduce the number of optical signal transmitters and optical signal receivers in optical communication using a multi-core fiber or a multi-mode fiber.The optical signal transmitter includes: a photoelectric conversion unit for detecti...
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JP5962669B2 |
Provided is an optical pulse-generator capable of efficiently using by a low driving voltage an entire band of an optical frequency comb input to a chirp compensator for the formation of an optical pulse. According to a graph shown in FI...
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JP5955944B2 |
Roughly described, an optical device has first and second waveguide segments which are constructed such that irradiation changes both average refractive index and also birefringence in the respective segment. The change in birefringence ...
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JP5938007B2 |
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JP2016099568A |
To solve the conventional problems in which, when an optical fiber is used to perform signal comparison in an optical frequency domain (optical carrier) in order to perform frequency comparison between faraway optical clocks, variation i...
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JP2016099595A |
To provide a three-terminal optical signal control element having a sandwich-type configuration formed by connecting two semiconductor optical amplifiers by an AWG (Arrayed Waveguide Grating) optical filter and capable of providing wavel...
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JP5927034B2 |
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JP5923003B2 |
Provided is an optical receiver including a first delay interferometer, a second delay interferometer, and an input light splitting portion for inputting modulated light. The first delay interferometer includes a first light splitting po...
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JP5920467B2 |
The present invention includes a polarization beam splitter (111) that splits input signal light (Sig) into two different polarized waves (TM, TE); two variable optical attenuators (113, 114) that respectively adjust attenuation of and o...
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JP5909154B2 |
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