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JPH11503841A |
PCT No. PCT/DE96/00725 Sec. 371 Date Oct. 20, 1997 Sec. 102(e) Date Oct. 20, 1997 PCT Filed Apr. 18, 1996 PCT Pub. No. WO96/33535 PCT Pub. Date Oct. 24, 1996An optical frequency generator provided with an optical comb generator for gener...
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JPH1184443A |
To obtain a device capable of mitigating the required condition of a BPF for removing spontaneously radiated noise light and sweeping a wide band and precise light frequency by using plural optical ring circuits and arranging the narrow ...
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JPH1184444A |
To provide a sweep light frequency generator in which its optical loop circuit is constituted of polarization dependent parts and is capable of outputting a light pulse signal train having stable light intensity while intersecting the li...
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JPH1172811A |
To enable the amplitude modulation of an output waveform but while sensitizing to the amplitude of an optical signal waveform without sensitizing to the characteristic of the optical carrier signal of an optical signal by modulating an i...
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JP2868084B2 |
To provide a wavelength converter suitable for long distance high- capacity optical communication or the like without generating wavelength chirping. This wavelength converter is constituted of waveguides 1, 2 causing non-linear refracti...
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JP2862635B2 |
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JP2863564B2 |
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JPH11502634A |
PCT No. PCT/CH96/00035 Sec. 371 Date Aug. 27, 1997 Sec. 102(e) Date Aug. 27, 1997 PCT Filed Jan. 29, 1996 PCT Pub. No. WO96/24080 PCT Pub. Date Aug. 8, 1996New, compact optical-optical switches and/or wavelength converters manufacturable...
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JP2858593B2 |
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JP2858400B2 |
To improve spectrum conversion efficiency. On the basis of a solving method known as spectrum inversion (or light phase conjugation), a spectrum is changed. This device 1 generally includes a medium like a dispersion shift optical fiber ...
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JP2842940B2 |
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JPH10336116A |
To provide an optical transmission system and an optical transmission device which transmit an optical signal through a high frequency carrier by using a narrow band optical fiber. Beams from a semiconductor laser 30 are branched by a co...
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JPH10333198A |
To read information out of signal light of a wavelength conversion source by providing a means which takes a photocurrent, generated in an electric field absorption type optical modulator (EA modulator) corresponding to intensity-modulat...
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JPH10333199A |
To obtain the device which can operate fast and consists of a small number of components and is then simple in constitution by using a semiconductor laser which has a periodic structure in a waveguide so that an active layer has a gain n...
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JP2838935B2 |
PURPOSE: To prevent the deterioration of code error ratio characteristic by correcting the deviation of the intermediate frequency due to the fluctuation of mark ratio of a digital signal. CONSTITUTION: A digital signal converted into th...
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JP2839105B2 |
In a long-distance high-speed optical communication scheme in which multiple optical amplifiers are provided at a large number of stages in optical fibers, an optical signal from a light source which has a desired small line width and os...
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JPH10319454A |
To provide a wavelength converter of an optical signal to be used at the time of routing the signal especially in the field of remote communication. First and second branched paths including the structure of an interference device for su...
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JPH10512685A |
PCT No. PCT/GB96/00072 Sec. 371 Date Jul. 23, 1997 Sec. 102(e) Date Jul. 23, 1997 PCT Filed Jan. 16, 1996 PCT Pub. No. WO96/22562 PCT Pub. Date Jul. 25, 1996An optical switch includes a semiconductor gain medium and inputs for an optical...
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JP2828707B2 |
A novel single sideband electro-optic modulator (10) includes a planar waveguide structure (14) allowing only circularly polarized optical and microwaves to propagate therein with equal phase velocities comprises a strip loaded GaAlAs/Ga...
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JPH10301151A |
To provide a wavelength converter which is easily configured, control, and is stable in the operation for the use of a long distance large capacity optical communication, etc. This wavelength converter has a waveguide 5 generating nonlin...
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JP2824511B2 |
To make possible shifting a wavelength of an optical signal with simple constitution by irradiating first, second coherent waves with wavelengths different from each other on a variable refractive index part, generating an interference p...
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JPH10293332A |
To provide a pulse train modulating method, a light sampler and a light pulse shaping device, easily controllable and integrally formable. A pulse train is inputted to a Mach-Zehnder interferometer, and a data stream is inputted to one o...
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JP2818864B2 |
To provide a light pulse train forming method capable of forming pulses of arbitrary time waveforms, and an apparatus therefor. The light having frequency spectra of uniform frequency intervals is generated by using a semiconductor laser...
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JPH10290053A |
To obtain photons on the order of a specific number of pieces or higher, whose wavelength is made short by a method wherein electrons in an electron beam are made to collide with photons in a laser beam which is radiated from a laser lig...
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JP2809796B2 |
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JPH10274504A |
To attain optical determination of transition timing and integral manufacture of an interferometer device by changing the interference state of an interferometer according to data of a received optical signal. A semiconductor light ampli...
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JPH10268370A |
To obtain a desired optical channel having desired corresponding time delay by arranging a filter which selects a specific 'teeth' in an optical frequency comb on the output side of an optical comb generating device. The optical frequenc...
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JPH10256637A |
To prevent the influence due to the level change of an analog signal outputted from a detector, by controlling the oscillation frequency of laser in such a manner that the difference of two phases becomes constant. A laser light which is...
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JP2802366B2 |
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JP2798149B2 |
PURPOSE: To provide the optical circuit which can contribute to the simplification of a light signal receiver. CONSTITUTION: This optical circuit has a 1st beam splitter 34 which deflects and separates the signal light introduced into an...
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JPH10228041A |
To obtain the wavelength converter which is transparent to the transmission rate and protocol of a processing signal and never varies in the quality of its output signal even if optical characteristics of its input signal change by provi...
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JPH10221725A |
To provide a wavelength conversion circuit used in wavelength multiplex cross connection in large capacity light wave network communication. This circuit is a hybrid Michelson interference type wave-length conversion circuit optically co...
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JP2787345B2 |
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JP2786188B2 |
The present invention relates to coherent optical heterodyning receivers which mix a received optical signal (ES), including an arbitrary polarization state, and a local oscillator signal (EL), including a fixed polarization state, while...
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JP2785452B2 |
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JPH10213830A |
To expand the application of a single-sideband optical modulator until a tuning laser needed for a system can be eliminated or reduced by providing single-sideband optical frequency shifters (SOB-OFS), and giving a positive and a negativ...
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JPH10206919A |
To make a light source manages with a wavelength sweep within its operable range by expanding the continuously variable wavelength range of the light source without deteriorating the coherence of the light source itself, and making a wav...
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JPH10206918A |
To actualize a waveguide type wavelength converting element which can easily be constituted and manufactured. This element is equipped with one tapered optical waveguide 1 formed on a plane substrate and striped branch optical waveguides...
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JP2784389B2 |
PCT No. PCT/US90/01345 Sec. 371 Date Jul. 5, 1991 Sec. 102(e) Date Jul. 5, 1991 PCT Filed Mar. 15, 1990.An image processing apparatus having a third-order nonlinear stimulated photon echo medium (1). The photon echo medium (1) can store ...
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JP2784038B2 |
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JP2775692B2 |
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JPH10186425A |
To obtain an full light processing type light frequency tracking device, in which the frequency interval wanted to be set is not limited by the band of an electric circuit, by providing a wavelength converter having specific functions. F...
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JP2774630B2 |
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JPH10178394A |
To prevent the deterioration of a signal quality due to the deterioration of the S/N by matching a local optical source frequency on a receiving side to a carrier optical source frequency on a transmitting side so as to generate a freque...
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JP2762911B2 |
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JP2760856B2 |
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JP2761951B2 |
PURPOSE:To improve light propagation loss in an entire element and to perform high-efficiency optical modulation to guided light by Brag diffraction by arranging two optical modulation parts in series with respect to a light advancing di...
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JPH10150235A |
To provide a reference light frequency generating circuit which is capable of stably and continuously feeding a light pulse train which serves as a light frequency reference from a light ring circuit. A reference light frequency generati...
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JPH10142643A |
To operate a wavelength converter regardless of an applied signal by converting the wavelength of NRZ signal by use of a 3×3 coupler. In addition to a fiber 1, a nonlinear optical Sagnac interferometer (NOLM) have two couplers 2, 4. The...
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JP2758227B2 |
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