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JP4949496B2 |
The optical frequency comb generating device having two optical modulation parts 41 and 42 independently modulating optical waves propagating in two branch waveguides and a phase regulator 43 controlling a phase difference between the op...
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JP4939525B2 |
A method and device capable of evaluating the specific values of the polarization state of the signal transmitted in a photonic transmission system for a number of frequencies of one or more of the pulses extracted from the optical signa...
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JP2012078413A |
To enable the generation of an optical pulse with reduced distortion.The optical frequency comb generation device which includes an optical modulator for branching light into two, modulating each of the two branched light, and then combi...
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JP4918203B2 |
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JP2012070051A |
To provide a coherent optical receiver that operates stably at startup in a optical coherent reception system using a polarized multiplex optical signal.In a coherent optical receiver: a polarization beam splitter, to which a polarized m...
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JP4895052B2 |
In a delay interferometer in which a Michelson delay interferometer unit is mounted in a package, the delay interferometer includes a Michelson delay interferometer unit which outputs first interference output light from a first output p...
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JP4893969B2 |
In a delay interferometer in which a Michelson delay interferometer unit is mounted in a package, the delay interferometer includes: a Michelson delay interferometer unit in which A-channel interference output light obtained by optically...
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JP4889128B2 |
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JP4893672B2 |
The present invention relates to a coherent optical communication apparatus and method. According to the invention, the optical communication apparatus receives a modulated optical signal, which is generated by modulating an optical sign...
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JP4889951B2 |
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JP4893409B2 |
A demodulator comprises an input splitter, optical device sets, and couplers. The input splitter splits an input signal comprising symbols to yield a number of signals. A first optical device set directs a signal of along a first path. A...
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JP2012044626A |
To solve the problem that information on an optical phase of local oscillation light beams cannot be specified in respective light reception portions and an optical phase relation of signal light of respective channels in wavelength mult...
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JP4882042B2 |
It is an object to provide an optical frequency control device or the like which can quickly carry out control over a wide frequency range. The object is achieved by an optical frequency control device or the like comprised of an optical...
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JP4883306B2 |
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JP4875237B2 |
Solely lightwaves required to be wavelength converted are filtered out from the input broadband WDM lightwaves and are wavelength converted by use of FWM. Not only the broadband simultaneous wavelength conversion that is studied by many ...
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JP2012013782A |
To provide an optical demodulator which is used in a communication method using a phase change as a modulated signal, such as a DQPSK modulation method, the optical demodulator suppressing a temperature dependent frequency shift, and hav...
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JP4844432B2 |
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JP2011257513A |
To provide an optical 90-degree hybrid reduced in size and manufacturing cost.An optical 90-degree hybrid 1 includes a 90-degree hybrid circuit 4 which is formed in a planar light wave circuit of a PLC (Planar Light wave Circuit) chip 3 ...
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JP4843633B2 |
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JP2011254028A |
To provide a phased array laser apparatus that performs, by the same apparatus, correction of a phase difference in each sub-array and correction of an angle of beam spread of each sub-array, and focus adjustment to a desired position fu...
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JP2011247911A |
To provide an optical wavelength conversion device with an expanded dynamic range of input signal light power.The optical wavelength conversion device is mounted with one or more Mach-Zehnder interferometers configured by arranging two s...
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JP2011204882A |
To provide a vacuum ultraviolet light generation device which is not enlarged, and has small power loss, and varies a wavelength while suppressing a beam line shift.The vacuum ultraviolet light generation device which employs a four-wave...
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JP2011203550A |
To implement a heterodyne light source with a high output and a high frequency accuracy by using an optical frequency comb device.A heterodyne light source (1) includes an optical frequency comb device (1) which generates an optical freq...
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JP4791536B2 |
An optical field receiver comprises an optical branching circuit for branching a received optical multilevel signal into first and second optical signals, a first optical delayed demodulator for performing delayed demodulation on the fir...
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JP4793814B2 |
To propose a quantum teleportation for obtaining high-efficiency transportation using continuous quantity of an optical field. A distributor 2 emits a first to fourth squeezed optical beams. The first and third squeezed optical beams fro...
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JP4785392B2 |
A fabrication method of fabricating a structure capable of being used for generation or detection of electromagnetic radiation includes a forming step of forming a layer containing a compound semiconductor on a substrate at a substrate t...
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JP4781648B2 |
An optical resonator includes a waveguide (12) formed by using an incidence side reflection film (93) and an emission side reflection film (94) arranged in parallel with each other and adapted to resonate light entering it by way of the ...
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JP4771216B2 |
An optical frequency COM generator generating an optical frequency COM having flat spectrum characteristics using a single modulator. The optical frequency COM generator has a drive signal system (11) and a bias signal system (14) which ...
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JP4770998B2 |
In a synchronous circuit, a synchronizing signal generator combines either an optical BPSK signal or local oscillation light with a phase-shifted signal to produce different optical signals, one of which for use in producing a signal dem...
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JP4763013B2 |
The present invention provides methods to control phase shift of delay demodulation devices to reduce Polarization Dependent wavelength (PDλ) to be less than, for example, 0.5 GHz (i.e. 0.004 nm). The method to control phase shift in a ...
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JP4759665B2 |
In order to provide a reciprocating optical modulation system capable of obtaining a broad bandwidth, a reciprocating optical modulation system (1) of the present invention is basically provided with an optical modulator (2) modulating a...
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JP4763952B2 |
A method for encoding information that is encoded in spatial variations of the intensity of light characterized by a first wavelength in light characterized by a second wavelength, the method comprising: transmitting the first wavelength...
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JP2011164127A |
To provide: a device which achieves wavelength conversion by using a Purcell effect and a photonic band gap effect in a coupling system between a quantum dot and a resonator; a wavelength conversion method; and a single photon generation...
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JP4755231B2 |
To provide a quantum number delivery system which is firm for a photon number branching attack. A transmitter performs phase modulation of respective pulses of optical pulses sequence generated by a constant time interval T in ä0, π} o...
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JP4748504B2 |
An optical fiber wavelength converter inputs signal light and pumping light into an end of the highly nonlinear optical fiber to obtain converted light of the signal light from the other end of the highly nonlinear optical fiber. In the ...
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JP4751370B2 |
Signals can be superimposed on optical phase even when low-coherency light is used, and a bit rate and a signal coding format similar to those used in ordinary optical communications can be used. A transmitter includes an asymmetric inte...
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JP4740526B2 |
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JP2011141477A |
To prevent decrease in a signal-to-noise ratio in wavelength conversion for a single photon.A wavelength converting device is provided, including: a coupled quantum dot having a first quantum dot and a second quantum dot; an optical reso...
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JP2011141513A |
To solve the problems, wherein in conventional optical fiber based communication techniques, radio frequency must be controlled accurately, further, an optical filter, a phase controller, and the like, must be additionally installed.The ...
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JP4728267B2 |
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JP4731254B2 |
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JP2011135497A |
To solve the problem in a conventional digital coherent reception system where the cost required for the digital coherent reception system becomes higher as the wavelength multiplexing carrier number increases because of the narrower lin...
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JP2011128472A |
To provide a wavelength conversion apparatus for converting infrared ray into visible light by the change of a refractive index.A first Bragg light reflecting layer 10 is configured such that 21 layers of a layer 11 whose film thickness ...
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JPWO2009104631A1 |
The transmitting side communication device 100 of the optical communication system using the DQPSK (Differential Quadrature Phase-Shift Keying) method includes an optical carrier generator 102 that generates an optical carrier whose freq...
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JP4709799B2 |
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JP4694521B2 |
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JP4694526B2 |
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JP4692601B2 |
A single sideband modulator uses a radio-frequency signal output by a voltage controlled oscillator to modulate a reference optical signal output by a local light source, thereby obtaining several sideband signals, and combines the sideb...
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JP2011517152T |
How to set up a demodulator used to a lightwave signal of the 1st frequency modulated by phase deviation abnormal conditions, It has passing inside of a demodulator for probe light which has the 2nd frequency that is not equal to the 1st...
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JP4686785B2 |
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