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JP2000010137A |
To enable wavelength conversion near to signal light by outputting only the wavelength conversion light without using an optical filter with a wavelength converter utilizing the oscillation suppression phenomenon of a semiconductor laser...
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JP2000010136A |
To enable wavelength conversion near to signal light by operating even to the high speed signal with a wavelength converter utilizing the gain suppression phenomenon of a semiconductor optical amplifier and outputting only the wavelength...
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JP2991261B2 |
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JP2993582B2 |
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JPH11326976A |
To provide an equal-frequency interval multiwavelength light source which has a large frequency shift quantity. This multiwavelength light source uses a light intensity modulator 21 having two arms where electrodes 21a and 21b for phase ...
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JPH11326977A |
To provide an optical frequency shifter which has a large shift quantity. This optical frequency shifter removes unnecessary light and amplifies necessary light by making good use of an injection synchronization phenomenon obtained by ma...
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JPH11326975A |
To reduce the loss of signal information due to the optical nonlinear effect of an optical waveguide and to enable the optical transmission for a long distance by providing a space filter having a function which modulates the intensity a...
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JP2981698B2 |
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JP2981695B2 |
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JP2982168B2 |
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JP2979644B2 |
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JP2973512B2 |
PURPOSE:To make a light shielding layer unnecessary and, at the same time to improve the using efficiency of a light source and photodetector by providing a wavelength converting member on the route of signal light. CONSTITUTION:An origi...
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JP2974077B2 |
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JP2974015B1 |
[wrap up] [Task] Realize a block converter system that can guarantee operation over a wide temperature range using an inexpensive crystal oscillator. In the outdoor receiver 1, an up-converted local signal and a pilot signal are generate...
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JP2969854B2 |
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JP2964984B2 |
To provide an optical switch device reduced in its packaging volume and cost by integrally forming a space switch part and an wavelength switch part. An wavelength converter 121 connecting its input terminal to an optical branching unit ...
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JPH11271827A |
To provide a high-frequency modulated signal generating device which can be constituted easily at low cost and can generate a modulated signal of a high frequency having a stable center frequency. Output light from a light source 102 is ...
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JP2959782B2 |
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JP2953004B2 |
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JPH11261494A |
To have a remaining AM signal element eliminated by a small-sized structure and easy control. This device is an optical heterodyne type FM modulator which, after generating an optical FM modulation signal by having an input signal drive ...
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JPH11258560A |
To improve a wavelength conversion efficiency and to stabilize a wavelength conversion operation. This converter has a waveguide layer 11, which changes in the absorption intensity of incident light of a wavelength λp according to incid...
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JP2949647B2 |
PCT No. PCT/GB91/00732 Sec. 371 Date Nov. 23, 1992 Sec. 102(e) Date Nov. 23, 1992 PCT Filed May 8, 1991 PCT Pub. No. WO91/17474 PCT Pub. Date Nov. 14, 1991.An optical signal regenerator has a semiconductor laser in a resonant cavity defi...
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JP2948645B2 |
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JP2947920B2 |
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JPH11242251A |
To provide a wavelength conversion circuit used in a wavelength multiplexed cross-connection in large capacity optical wave network communication. This wavelength conversion circuit of a phase modulation system is composed of a semicondu...
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JP2940946B2 |
The signals are introduced into at least one semiconductor laser amplifier of the resonant type (2), in the vicinity of the active layer (14) of this amplifier, the latter being polarised below its threshold current and having at least o...
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JPH11509642A |
PCT No. PCT/DE96/01193 Sec. 371 Date Dec. 30, 1997 Sec. 102(e) Date Dec. 30, 1997 PCT Filed Jun. 28, 1996 PCT Pub. No. WO97/02634 PCT Pub. Date Jan. 23, 1997The invention relates to a wavelength converter for converting a first light sig...
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JPH11218791A |
To eliminate the need for an optical filter, to simplify constitution and to obtain large conversion efficiency by short length in a wavelength con verter for converting the wavelength of signal light by non-degenerated four- optical wav...
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JP2926968B2 |
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JP2925651B2 |
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JP2923684B2 |
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JP2923032B2 |
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JPH11183619A |
To provide an injection method for seed light in a coherent laser radar, in which a detecting capability in a heterodyne detection is increased or in which required output of a master laser can be reduced, by a method wherein the output ...
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JP2914008B2 |
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JPH11167133A |
To provide a photodetecting circuit which has low loss and makes it easy to adjust the detection current of a balance type by using a multimode optical fiber only on the output side of an optical coupler. The photodetecting circuit is eq...
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JP2907350B2 |
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JP2905711B2 |
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JP2904445B2 |
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JP2905885B2 |
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JP2902008B2 |
PURPOSE:To efficiently supply the white light necessary for human life and to arbitrarily mix light rays so that the light rays of different colors can be obtd. by laminating and disposing a red fluorescent light condenser, green fluores...
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JP2901263B2 |
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JP2902475B2 |
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JPH11149101A |
To receive a stable image signal, etc., without being affected by an external noise by separating an inputted polarization plane modulation signal into a P-polarized light signal component and an S-polarized light signal component, conve...
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JP2897819B2 |
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JPH11142902A |
To provide an integrated interferometer structural body having peripheral amplifiers which may be operated even in a nonsaturated state. The first and second branches of the structural body having at least one first semiconductor optical...
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JP2891761B2 |
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JP2890034B2 |
A device capable of obtaining an electromagnetic wave having an arbitrary waveform and an arbitrary frequency, generating an electromagnetic wave with an ultrahigh frequency, generating an electromagnetic wave with a variable frequency, ...
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JPH11101996A |
To make it possible to simultaneously generate two laser beams varying in frequencies and to stabilize the frequencies by receiving the light rays which are branched by an optical element for branching and are passed through a frequency ...
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JP2879003B2 |
An image measuring apparatus for measuring an image of a tooth or gum applies the radiation of a laser beam to permit extremely quick, reliable, safe detection of dental caries and other dental pathological conditions. The low incident p...
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JP2875537B2 |
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