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JP5211117B2 |
To provide a terahertz continuous wave generation device and a terahertz continuous wave generation method. The terahertz continuous wave generation device includes: an optical carrier wave providing part for providing two optical carrie...
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JP5202015B2 |
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JP5193708B2 |
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JP5193188B2 |
Regarding an optical pulse reshaping device of CPF type, there are subjects to reduce the number of stages by enhancing a compression efficiency as extremely higher for one stage of the CPF with maintaining a quality of an output pulse a...
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JP2013078093A |
To obtain a data signal without need of accurate control of wavelength.A dispersion medium 1 receives input of carrier light EC phase modulated on the basis of a subcarrier modulation signal modulated by a data signal. An extraction unit...
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JP2013078034A |
To provide an optical receiver, which demodulates a DQPSK-modulated optical signal, including a 1-bit delay circuit composed of a spatial optical system, having no optical path difference of differential output light, outputting it in th...
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JP5188837B2 |
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JP2013074439A |
To perform more reliable channel multiplex communication by eliminating a configuration for modulation and integration to identify a channel at a transmission side and a configuration for demodulation and separation at a reception side.A...
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JP5182994B2 |
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JP5181770B2 |
An optical transmission system capable of efficiently reducing waveform distortion of an optical signal. A transmitting-side distortion compensation coefficient storage (1a) of a transmitting station (1) stores transmitting-side distorti...
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JP5176191B2 |
To provide an optical gate switch circuit that can be reduced in size and integrated, and that utilizes interference caused in optical phase modulation performed in accordance with light intensity by using a semiconductor element whose n...
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JP5169710B2 |
An optical receiver for receiving a processing modulated optical signal, the optical receiver includes a variable dispersion compensator for receiving the optical signal and for compensating chromatic dispersion of the optical signal in ...
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JP5168973B2 |
An interferometer of the invention includes: a first splitting element which includes a first transparent medium and a first splitting film formed on the first transparent medium, and which splits incident light into a first split beam a...
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JP5158859B2 |
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JP5147582B2 |
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JP2013011777A |
To provide a compact delay interferometer allowing a low-cost packaging.A differential phase-shift keying optical receiver includes a 1-bit delaying interferometer adapted to emit second light and third light that is 1-bit delayed compar...
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JP5122499B2 |
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JP5122498B2 |
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JP2013003256A |
To realize requirements on a wobble used for secure optical communication, the requirements such as high white-color property, high stability, capability of magnitude adjustment, and good quality in transmission property of light produce...
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JP2012533915A |
A representative optical receiver of the invention receives an optical transverse-mode-multiplexed (TMM) signal through a multimode fiber that supports a plurality of transverse modes. The optical receiver has a plurality of optical dete...
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JP5104963B2 |
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JP2012249126A |
To reduce power consumption significantly when compared with the digital coherent system, by reproducing the local light emission stably and simply over a wide wavelength range.The coherent receiver comprises: an optical amplifier 1 whic...
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JP5090382B2 |
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JP5075739B2 |
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JP5079657B2 |
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JP5075480B2 |
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JP2012226256A |
To achieve realization of a stabilized signal frequency even when a surrounding environmental temperature varies largely due to an expanded frequency adjusting range of a high frequency signal.A high frequency oscillator comprises: an op...
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JP5068390B2 |
A feedback signal indicative of the average RF power of an APol-DPSK optical signal is used by a PMD compensator to adjust the amount of compensation applied to the optical signal.
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JP5062303B2 |
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JP2012208162A |
To provide a small and integratable wavelength conversion device suitable for wavelength conversion of an optical signal in an optical communication system, which achieves little S/N degradation caused by intrusion of amplified spontaneo...
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JP5058105B2 |
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JP5050140B2 |
To provide an easily produceable fine particle dispersion of a fluorescent substance for a three-dimensional display device, using the fine particles of the fluorescent substance exhibiting upconversion fluorescence, and capable of being...
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JP5045161B2 |
An optical fiber and a broadband light source that can generate SC light having a broader bandwidth. A broadband light source 1 is equipped with a seed light source 11 and an optical fiber 12. The seed light source 11 outputs light havin...
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JP5041256B2 |
A quantum entanglement generating system includes: a laser light source for producing a light beam of light frequency 2f0; a ring interferometer comprising a beam splitter into which the light beam of light frequency 2f0 is incident and ...
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JP5036610B2 |
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JP5028555B2 |
To be suitable for a high-density wavelength multiplex transmission (DWDM) system having a frequency comb light generating device as a transmission source, and to detect a signal component in an error-free state on a reception side even ...
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JP2012173423A |
To provide an optical device and a method for adjusting characteristics of optical device output light, capable of configuring a digital coherent receiver with excellent CMRR characteristics in adequately stable manners.The optical devic...
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JP2012521153A |
A coherent optical detector having a waveguide circuit, in which a plurality of waveguides are connected to a waveguide grating. In a representative embodiment, the waveguide grating serves at least three different functions, e.g., those...
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JP5009890B2 |
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JP5006978B1 |
An optical modulation system has a function to compensate an operating point drift, which occurs in an MZ optical modulator, by carrying out feedback control with use of a low frequency signal. A judgment section judges stability of feed...
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JP5006850B2 |
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JP5006933B2 |
A demodulator is provided for a multilevel differential phase shift keyed signal, capable of eliminating polarization dependence due to birefringence and polarization coupling-induced light resulting from a waveguide structure, and also,...
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JP5009130B2 |
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JP2012150327A |
To provide a two-beam multiplexing circuit that has no requirement for fusing an optical fiber for connecting between an interferometer module and a PD (or Photo Detector) module, and that has little occurrence of loss of interference li...
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JP4990969B2 |
An apparatus includes one or more optical couplers, an optical medium, and an optical pump source. The optical medium behaves as a negative refractive index material over a frequency range. The one or more optical couplers are configured...
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JP4979286B2 |
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JP2012515468A |
An exemplary apparatus for digital coherent detection of a multi-wavelength signal includes a polarization-diversity optical hybrid, at least four Wavelength De-Multiplexing (W-DMUX) filters, 4M detectors, and 4M analog-to-digital conver...
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JP4966871B2 |
An all-fiber, phase controlled interferometer device is disclosed as well as its method of manufacture. This device is suitable for use in an optical DPSK demodulation system. It is comprised of two optical fiber couplers, each having tw...
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JP4968073B2 |
An optical signal demultiplexing device includes a demultiplexing unit that receives an optical signal multiplexed by an optical time-division system and a synchronization pattern, and demultiplexes the optical signal based on the synchr...
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JP4949620B2 |
The present invention is an optical waveform shaper that utilizes a plurality of interferometers. Each interferometer has one of two types of transfer functions. One type is a first transfer function characterized as having a positive se...
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