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JPH03110528A |
PURPOSE:To convert the wavelength of an input optical signal optically as much as possible and to output the optical signal by inputting the output of a photodetector and detecting a signal for converting the wavelength from input electr...
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JPH03109530A |
PURPOSE:To attain the exchange between frequency-multiplexed signals while maintaining phase information by impressing electric signals shifted in phases between plural electrodes provided on a material having an electrooptical effect an...
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JPH03103837A |
PURPOSE:To constitute a converter so that an output light becomes the complete wavelength conversion light of an input light by setting the wavelength of the input light and a polarized wave to a converting means so that the injecting sy...
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JPH0396930A |
PURPOSE: To provide a data signal regardless of polarization by selecting the value of difference between the lengths of pathes while mutually shifting them to be equal with optical phase deviation contained in an FSK modulated transmiss...
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JPH0394212A |
PURPOSE:To display a scanning image which has no scan deviation by controlling optical scanning timing with an optical sensor. CONSTITUTION:Image information from a laser diode 11 is reflected linearly by, for example, a polygon scanner ...
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JPH0391726A |
PURPOSE:To offer an optical carrier generator whose optical carrier frequency interval is easily controlled and variable by using >= stage of an acoustooptic element which is modulated by a sine wave signal generator to shift the optical...
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JPH0385834A |
PURPOSE: To attain optical frequency multiplexing with a narrow channel interval by providing an optical filter having a pass band passing a required minimum spectrum for demodulation of a signal with respect to each signal constituting ...
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JPH0384525A |
PURPOSE:To realize an optical access node which extracts and receives necessary information from signal light and transmits the sent signal light to a next node as it is by providing a means which demodulates a signal to be selected and ...
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JPH0382089A |
PURPOSE: To generate laser light of a wave band not obtained by the increase of the output of an ultraviolet laser light, the generation of a second harmonic wave of a semiconductor laser by uniformly distributing an anthracene fine crys...
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JPH0380635A |
PURPOSE: To take a long transmission distance by devising the system such that an excellent eye pattern is obtained in the case of high speed optical communication and a reception section receives an optical pulse with a large extinct ra...
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JPH0380230A |
PURPOSE:To obtain a light receiving device having high sensitivity and wide dynamic range by detecting an electrical signal outputted from a photoelectric conversion device and controlling the gain of an optical signal amplification devi...
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JPH0322964B2 |
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JPH0371118A |
PURPOSE:To cancel high-order group delay distortion and to equalize the delay by arranging a group delay equalizer on the intermediate position between a light transmitter and a light receiver. CONSTITUTION:A base band signal 1 is conver...
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JPH0371119A |
PURPOSE:To offer the waveguide type polarization diversity optical circuit reduced at its size, guaranteed at its stable operation and applicable to the light transmission of super high frequency by integrating a polarized light separati...
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JPH0361906A |
PURPOSE: To continuously control delay over a wide delay range through a compact and light device with less energy consumption by controlling the frequency of a carrier wave and injecting the carrier wave of the controlled frequency to a...
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JPH0361932A |
PURPOSE:To obtain a sharply profiled printing record by energy-transforming the printing information light into secondary electrons, simultaneously highly energizing the information light and emitting the fluorescent material element sur...
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JPH0346838A |
PURPOSE: To autonomously and locally attain accurate and instantaneous stability of a semiconductor laser by adopting an absolute frequency reference element to be driven through an optogalvanic effect in a feedback control loop having a...
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JPH0317526U |
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JPH0336506A |
PURPOSE:To demultiplex signal light into a TE-mode and a TM mode light beam without using any external power source and to reduce the size of a device by demultiplexing signal light spatially by a 1st and a 2nd striped optical waveguide ...
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JPH0335226A |
PURPOSE: To realize a phase non-sensitive and/or polarization non-sensitive optical heterodyne reception by shifting a transmission signal or a local oscillator signal between specified polarized states and obtaining an intermediate freq...
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JPH0333726A |
PURPOSE:To realize subminiaturization and stable operation by integrating a polarized wave separating circuit which uses a balanced receiver type polarization diversity reception system by using optical waveguides. CONSTITUTION:This opti...
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JPH0324528A |
PURPOSE: To obtain the reception of phase and polarization blind by simultaneously executing the reception of phase blind by a phase shift and the reception of polarization blind by a polarizing shift without being related to each other....
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JPH0317633A |
PURPOSE:To obtain an optical inverter function for generating the light output which is the inversion of a strong/weak signal by superposing the weak signal on a 2nd light input while 1st light is inputted. CONSTITUTION:The 1st signal li...
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JPH0315830A |
PURPOSE:To obtain the optical switch which selects a path, etc., with a wavelength by providing the semiconductor laser diodes which oscillates with the wavelength lambda1 or lambda2 and lambda1 or lambda2 and oscillating a wave with the...
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JPH0313906A |
PURPOSE:To improve the characteristic of an optical integrated circuit by providing a groove to a part other than the optical waveguide part of a light guide layer and intercepting light which is not guided with the aid of the groove. CO...
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JPH0311302A |
PURPOSE:To obtain a gate capable of separation of components by providing two optical waveguides which are closely arranged in a base body and are being in directional coupling and a diffraction grating in the coupling part between two o...
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JPH039624A |
PURPOSE: To prevent deterioration in quality due to the gain saturation of an optical repeater from occurring by performing transmission by performing the frequency conversion of a light source with an optical signal at a transmission si...
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JPH036535A |
PURPOSE:To enable low-voltage driving by controlling independently optical paths of light beams with different wavelengths LAMBDA and lambda which are multiplexed and inputted by controlling voltages applied to a 1st 45 deg. TN liquid cr...
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JPH032842A |
PURPOSE:To improve the wavelength resolution by varying the length of ion exchange waveguide parts of a first and a second waveguides. CONSTITUTION:In a phase difference giving means 27, when a difference of a refractive index of a first...
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JPH02311829A |
PURPOSE:To improve the mounting performance and handling ability by shifting coupling positions between input optical fibers and respective output optical fibers from the lens optical axis of a lens. CONSTITUTION:The input fibers 21 and ...
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JPH0259519B2 |
An armoured optical fibre cable is formed with a core construction comprising three glass clad optical fibres 51 twisted into a long pitch helix, a sort plastic buffer coat 52 around the fibres 51, and a hard jacket 53 of low diffusivity...
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JPH02296226A |
PURPOSE:To detect the change in the wavelength of the laser beam modulated in wavelength at a high speed with high accuracy and to demodulate the same to an electric signal by utilizing the spectral effect by a diffraction grating and th...
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JPH02296227A |
PURPOSE: To realize the optical heterodyne reception of a straight line polarization received signal over a long distance by changing polarization by a half wavelength plate with a fixed polarizing direction coinciding with the straight ...
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JPH02294617A |
PURPOSE: To reduce a production cost and to save power consumption by permitting a signal processing means to control a polarized state control equipment consisting of plural liquid crystal devices in accordance with a difference signal ...
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JPH02293826A |
PURPOSE:To allow optical wavelength conversion with high efficiency without requiring pumping light by setting the wavelength of the frequency modulation signal light to be inputted to a converting means so as to have the wavelength diff...
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JPH02287444A |
PURPOSE:To obtain a high signal to noise characteristic by constituting the above device of a second higher harmonic wave generator and a squeezer which is pumped by the output light from the second higher harmonic wave generator and out...
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JPH02280128A |
PURPOSE:To obtain the optical heterodyne communication system which can make stable signal reception with a high sensitivity by using a negative frequency component suppression type optical light receiving device and subjecting one of th...
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JPH02281239A |
PURPOSE:To allow the demultiplexing of only the light of a desired wavelength even when the light of the desired wavelength and the light of the wave number to be the integer times the wave number of the wavelength thereof are multiplexe...
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JPH02269327A |
PURPOSE:To obtain an optical heterodyne detector which is small in size, stable, and also, can be manufactured easily by providing a photodetecting means for photodetecting a light beam mixed by a mixing means and outputting the correspo...
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JPH0250078B2 |
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JPH02264930A |
PURPOSE: To prevent light radiated from a local oscillator from being returned to a transmitting optical fiber by providing the light receiver with a means capable of preventing light radiated from the local oscillator from arriving at t...
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JPH02262628A |
PURPOSE:To prevent a difference in transmission condition from being generated between 1st branched light and 2nd branched light owing to disturbance by transmitting the sent light consisting of the 1st branched light and 2nd branched li...
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JPH02259629A |
PURPOSE:To allow a wide-band wavelength tuning over a wide wavelength band by organically coupling a monochrometer and filters of plural semiconductor elements. CONSTITUTION:The light signal at a point A is inputted by an optical coupler...
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JPH02259615A |
PURPOSE:To efficiently converge a laser beam onto a target object surface by constituting lasers of respective wavelengths and respective elements of a variable-shape mirror in such a manner that these lasers and elements can correspond ...
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JPH02259736A |
PURPOSE:To allow the pulling down of an amplified 1st light signal from a 2nd optical fiber by bringing the 2nd optical fiber into contact with the pulling down point of the light signal at the time of taking out this light signal from t...
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JPH02259626A |
PURPOSE:To exchange new and old signals in the state of light signals at a high speed by providing a polarization rotating element which rotates the polarization of light of a specific wavelength and a polarization separating element whi...
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JPH02242237A |
PURPOSE:To accurately measure the spectral ray width of a semiconductor laser without generating fluctuations in the spectral ray width by forming both ends of 1st, 2nd and 3rd optical fibers respectively diagonally with the side faces o...
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JPH02239209A |
PURPOSE:To obtain the small-sized optical wavelength filter having a sharp wavelength selecting characteristic and good coupling efficiency by forming a diffraction grating in a region where the respective waveguide modes centering at 1s...
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JPH02236533A |
PURPOSE:To exactly select a channel by detecting an optical frequency of a selection channel corresponding to a transmitting side, and selecting the channel, based on this frequency as a reference. CONSTITUTION:An optical frequency corre...
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JPH02235032A |
PURPOSE: To efficiently generate an optical signal of a single-frequency sideband by small microwave power by setting up the side of an optical element on a boundary between a fin part of an electrode mechanism and the optical element to...
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