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JP4439244B2 |
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JP2010054571A |
To provide an optical modulator for modulating light by microwaves in an electromagnetic wave region including in principle a THz region by utilizing interaction of the electron beam radiated from an electron radiation section and travel...
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JP2010050735A |
To provide a differential phase shift keying light transmitting system that suppresses a bit error even if a pulse spreading occurs.In the light transmitting system of a differential phase shift keying light transmitting method, the syst...
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JP4423372B2 |
It is an object of the present invention to provide a multiple wavelength signal generation device capable of generating lights of more wavelengths, and a generation method for multiple wavelength light using a multiple wavelength signal...
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JP2010039315A |
To provide a manufacturing method for a differential phase modulated light receiving module can reduce a cost and can make a size compact, while keeping the consistency of delay of a differential signal flowing between a delay interferom...
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JP4397567B2 |
The method according to the present invention includes the steps of inputting an optical signal having a first wavelength and probe light having a second wavelength different from the first wavelength into a nonlinear optical medium, bro...
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JP4395151B2 |
A method and system for AO3R functionality is presented. The system includes an AO2R device followed by an AOCR clock recovery module and an AOR retiming device. The AOR retiming device takes as input a recovered clock signal extracted f...
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JPWO2008007615A1 |
An optical phase detecting means for comparing the phases of a reference optical signal and a beat optical signal to generate a phase error signal, a shaping means for shaping the phase error signal, and a beat optical signal generated b...
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JP4379531B2 |
A light emitting device, comprises: an excitation light source that emits excitation light; a wavelength conversion member that absorbs the excitation light emitted from the excitation light source, converts its wavelength, and releases ...
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JP2009284454A |
To provide a method for generating an optical OFDM signal, with reduced optical signal to noise ratio (OSNR) requirement.A method for generating an optical OFDM signal with reduced OSNR requirement includes separating an up-converted OFD...
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JP4372440B2 |
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JP4362622B2 |
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JP4360812B2 |
A single-photon generator includes an exciton generation part including therein a quantum dot, an excitation part for generating an exciton in the exciton generator part, a recombination control part for controlling recombination timing ...
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JP4354932B2 |
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JP2009237111A |
To provide a wavelength-converted light generating apparatus and generating method, capable of suitably generating the light of a shorter wavelength for the incident light of a prescribed wavelength by wavelength conversion.The wavelengt...
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JP2009239791A |
To provide an optical receiver and an optical testing device provided with the optical receiver, can set phases of two branches to target phases in a short period of time, in the optical receiver having two branches.An optical receiver 1...
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JP2009232353A |
To provide an optical signal processing circuit and receiver circuit wherein the loss of optical signal is reduced.An optical signal processing circuit 1 includes a function for converting a phase-modulated optical signal into an intensi...
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JP2009225142A |
To provide an optical communication apparatus in which the nonlinear degradation of a wavelength multiplexed signal in the nonlinear degradation factor member causing the nonlinear degradation is reduced, to provide an optical transmissi...
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JP2009218765A |
To provide a technique accurately reproducing data from an optical signal modulated using a differential M phase shift modulation system.A demodulator 1 has a heater 21 for applying phase shift to an optical signal obtained by branching ...
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JP4332616B2 |
A modulated optical signal processing method and apparatus optically convert an optical signal to an intermediate frequency band that simplifies electrical processing after optical detection, thereby increasing the optical reception sens...
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JP2009200733A |
To provide a versatile optical code division multiplex access system (OCDMA).The optical code division multiplex access system 5 has a central station 2 provided with a multi-port optical coder 1 and a decoding part 4 provided with a dec...
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JP2009182888A |
To provide an optical receiving unit capable of being downsized with a simple configuration for the DQPSK polarized wave multiplexing scheme and the power consumption and cost of which are small.The optical receiving unit separates DQPSK...
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JP4299826B2 |
A white light-emitting device (1) with a fluorescent fiber (3) comprises a semiconductor blue light-emitting element (2), with excited light falling onto one end of an optical fiber and passing to the far end. The fiber optics comprise a...
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JP2009147326A |
To provide an image sensing device and a CMOS image sensor comprising it.A CMOS image sensor includes: an image sensing device including a p-n junction photodiode and a pattern layer made of a metal substance and formed on an upper surfa...
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JP4284278B2 |
An optical signal processing method is disclosed that enables improvements of a signal to noise ratio of an optical signal and reduction of size and power of an optical signal processing device. The optical signal processing method inclu...
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JP4276323B2 |
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JP4277099B2 |
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JP2009516227A |
This invention relates to methods and apparatus for generating an optical frequency comb. In embodiments a passive mode locked optical waveguide comb uses electrical or optical tuning for the mode spacing frequency (df) and the carrier e...
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JP4251040B2 |
A wavelength conversion element which can set the wavelength of a pump light to a wavelength longer or shorter than the wavelength of a plurality of signal lights and a wavelength of a plurality of conversion lights present in an optical...
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JP4247927B2 |
A method and apparatus is provided for modulating the polarization of an optical signal. A polarization modulator receives an optical signal onto which data has been modulated at a predetermined frequency. The polarization modulator modu...
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JP4242864B2 |
A wavelength converter for generating a wavelength tunable laser optical source in itself is disclosed. The wavelength converter includes a first semiconductor optical amplifier for generating an optical noise, generating and outputting ...
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JP2009060022A |
To provide a wavelength-scanning laser light source capable of rapidly and continuously scanning the wavelength of a light source having a narrow band spectrum in a wide band, and of reducing the number of required optical isolators.This...
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JP4239751B2 |
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JP4221649B2 |
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JP2009505571A |
A receiver for coherent detection of a PSK modulated optical carrier includes an optical detector, digital-to-analog converters, and a digital module. The optical detector is configured to mix the modulated optical carrier with two phase...
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JP4219519B2 |
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JP4214224B2 |
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JP4200825B2 |
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JP4202290B2 |
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JP4189906B2 |
The invention relates to a method for detecting and processing the amplitude and phase of signal waves. A Modulated signal source generates the signal waves which are modified by transmission medium or by reflection and scattering by at ...
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JP4184131B2 |
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JP2008275547A |
To sample optical signals with high sampling efficiency with simple low-cost constitution and to stably obtain waveform information of high-speed optical signals.A carbon nanotube 23 is used as a sampling element of an optical sampling d...
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JP2008271090A |
To provide an optically controlled phased array antenna apparatus which puts an optical power to a practical use effectively, improves a signal to noise ratio of a signal light, and improves a quality of a communication signal radiated f...
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JP2008271479A |
To perform optimal control of a DPSK (differential-phase-shift-keying) demodulation circuit in accordance with the center wavelength of a DPSK optical signal.A DPSK optical receiver includes a DPSK demodulation circuit 3, an optical band...
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JP4170298B2 |
In an optical receiver according to the present invention, an input signal light subjected to the differential quadrature phase shift keying (DQPSK) is incident on a PANDA type fiber in a linearly polarized state by 45°, so that a delay...
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JP4164599B2 |
To provide a light frequency measuring instrument and a measuring method having a wide range of measurable wavelengths and used for finding a carrier envelope offset frequency fceowith a high S/N. The range of measurable wavelengths can ...
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JP4163174B2 |
To provide a light emitting thin film and optical device thereof, having high luminance, stable chemical property and capable of reducing cost. The light emitting thin film of the invention is obtained in the following processes, vapor d...
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JP4158655B2 |
A first semiconductor optical amplifier is disposed on a first arm of a Mach-Zehnder interferometer and a second semiconductor optical amplifier is disposed on a second arm. An optical splitter splits a probe light into two portions and ...
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JP4149704B2 |
The present invention relates to apparatus for providing orthogonally polarized light beams for use in precision metrology applications such as in the measurement of length or length changes using interferometric techniques. An input bea...
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JP4148036B2 |
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