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公开(公告)号：DE69130816D1
公开(公告)日：1999-03-11
申请号：DE69130816
申请日：1991-08-02
Applicant: CANON KK
Inventor： TOMITA YASUO , ODA HITOSHI , OKUDA MASAHIRO
IPC: G02F1/095
Abstract: In a polarization-state converting apparatus for use as an optical isolator, an optical modulator and the like there are provided a waveguide comprising a magnetic semiconductor, a device- for applying a magnetic field to the waveguide in a first predetermined direction, a device for applying an electric field to the waveguide in a second predetermined direction, and a mode conversion is caused via electrooptic and magnetooptic effects due to the electric and magnetic fields to change the polarization state of light propagating through the waveguide. When used as an optical isolator, the optical isolation is performed compensating for degradation of the mode conversion rate due to a phase mismatch between light incident upon the waveguide and light emerging from the waveguide. When used as an optical modulator, the optical modulation of light emerging from the waveguide is performed by varying the electric field and an optical isolation function is effected while compensating for degradation of the mode conversion rate due to a phase mismatch between light incident upon the waveguide and light emerging from the waveguide.
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公开(公告)号：DE69225251T2
公开(公告)日：1998-10-01
申请号：DE69225251
申请日：1992-02-06
Applicant: CANON KK
Inventor： TOMITA YASUO
Abstract: Disclosed are an optical interconnection network and process, having a phase-conjugate mirror and input and output side channels. In the network, time-reversed wave, of a light beam propagated through the output side channel, is generated in the phase-conjugate mirror to cause an interconnection between the input side channel and the output side channel. The energy of the time-reversed wave comes from a light beam propagated through the input side channel.
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公开(公告)号：DE69225251D1
公开(公告)日：1998-06-04
申请号：DE69225251
申请日：1992-02-06
Applicant: CANON KK
Inventor： TOMITA YASUO
Abstract: Disclosed are an optical interconnection network and process, having a phase-conjugate mirror and input and output side channels. In the network, time-reversed wave, of a light beam propagated through the output side channel, is generated in the phase-conjugate mirror to cause an interconnection between the input side channel and the output side channel. The energy of the time-reversed wave comes from a light beam propagated through the input side channel.
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公开(公告)号：DE3334923A1
公开(公告)日：1984-03-29
申请号：DE3334923
申请日：1983-09-27
Applicant: CANON KK
Inventor： TOMITA YASUO
Abstract: A magneto-optical recording medium is disclosed which comprises a substrate, a magnetic thin film and a multi-layered dielectric layer for regulating the reflection factor of the magnetic thin film.
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公开(公告)号：DE69130816T2
公开(公告)日：1999-07-08
申请号：DE69130816
申请日：1991-08-02
Applicant: CANON KK
Inventor： TOMITA YASUO , ODA HITOSHI , OKUDA MASAHIRO
IPC: G02F1/095
Abstract: In a polarization-state converting apparatus for use as an optical isolator, an optical modulator and the like there are provided a waveguide comprising a magnetic semiconductor, a device- for applying a magnetic field to the waveguide in a first predetermined direction, a device for applying an electric field to the waveguide in a second predetermined direction, and a mode conversion is caused via electrooptic and magnetooptic effects due to the electric and magnetic fields to change the polarization state of light propagating through the waveguide. When used as an optical isolator, the optical isolation is performed compensating for degradation of the mode conversion rate due to a phase mismatch between light incident upon the waveguide and light emerging from the waveguide. When used as an optical modulator, the optical modulation of light emerging from the waveguide is performed by varying the electric field and an optical isolation function is effected while compensating for degradation of the mode conversion rate due to a phase mismatch between light incident upon the waveguide and light emerging from the waveguide.
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Patent Agency Ranking
公开(公告)号：DE3333194A1
公开(公告)日：1984-03-22
申请号：DE3333194
申请日：1983-09-14
Applicant: CANON KK
Inventor： TOMITA YASUO
IPC: G11B11/10 , G11B11/105 , G11B7/00
Abstract: This specification discloses a magneto-optical information reading apparatus which comprises a device for causing a light beam polarized in a predetermined direction to enter a magnetic recording medium on which information is recorded, an analyzer provided in the optical path of the light beam modulated by the magneto-optic effect in accordance with the information, and a photodetector having the current amplifying function and photoelectrically detecting the light beam transmitted through the analyzer, and in which the following equation is substantially satisfied: where phi is the transmission axis azimuth of the analyzer relative to the predetermined direction of polarization and eta is the extinction factor of the analyzer.
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公开(公告)号：JPH063711A
公开(公告)日：1994-01-14
申请号：JP18580392
申请日：1992-06-19
Applicant: CANON KK
Inventor： YOHAN BERIKUISUTO , TOMITA YASUO
IPC: G02F1/35
Abstract: PURPOSE:To obtain the device and method which optically shape light pulses. CONSTITUTION:Plural coherent light beams are formed by a laser beam source or beam splitter 2, etc., and one of the plural light beams 1 is variably delayed by a movable refroreflector 7, etc. The intensity ratios of the plural light beams are adjusted by a half wavelength plate 4, polarizer 5, etc., and the plural light beams are coupled by a nonlinear type crystal 12, such as GaAs, at mirrors 3, 11, etc. The light beams are coupled by the nonlinear type crystal 12 and interference patterns are formed there. The transmission and reception of the energy are executed between the light beams by the transient energy migration utilizing self-diffraction, etc., by which the shaping of the pulses is executed.
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公开(公告)号：JPH05321819A
公开(公告)日：1993-12-07
申请号：JP14834392
申请日：1992-05-14
Applicant: CANON KK
Inventor： TOMITA YASUO
Abstract: PURPOSE:To drive a micro machine on a substrate by laser beams without any electric circuit. CONSTITUTION:Laser beams L1 from a semiconductor laser unit is applied to a rotor 2 through a beam splitter 11 and light focusing lens 12. The rotor 2 is provided with a plurality of vanes 5 to 8 extending radially and a side 8a of the vane 8 at the focusing position of the lens 12 reflects the laser beams L1 and is turned in the direction as shown by the arrow Y1 while given the propulsion force caused by the impinging energy of the laser beams L1. As a result, the rotor 2 is turned in the Y1 direction. The laser beams are partially led to a detector 10 through a beam splitter 11.
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公开(公告)号：JPH05102927A
公开(公告)日：1993-04-23
申请号：JP28915191
申请日：1991-10-08
Applicant: CANON KK
Inventor： SHIBATA MASAAKI , TOMITA YASUO
Abstract: PURPOSE:To provide an optical data pulse train generating method which can generate the optical data pulse trains at a super-high speed and with no limitation by an electrical modulation speed. CONSTITUTION:An optical pulse 6 passes through a beam splitter 1 and is divided into plural diffracted beams by a diffraction grating 2. Then the diffracted beams are turned into the one-dimensional perallel beams by a collimator lens 3 and then made incident on a space modulator 4. The modulator 4 is divided into plural segments according to the number of information bits. Then only the transmitted beams reach a reflector 5 among those beams that are transmitted (bit 1) or cut off (bit 0) by the modulator 4. These transmitted beams are reflected on a stepped reflecting surface end the optical path difference, i.e., the time delay is caused between the beams at a fixed interval. Then these beams are condensed on the same optical path by a collimator lens 3 via the modulator 4. These condenced beams have the time delays at the fixed intervals end therefore a time series pulse train 7 is generated.
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公开(公告)号：JPH05100256A
公开(公告)日：1993-04-23
申请号：JP28915291
申请日：1991-10-08
Applicant: CANON KK
Inventor： SHIBATA MASAAKI , TOMITA YASUO
Abstract: PURPOSE:To provide the light data pulse train detecting method which can detect an ultrahigh speed light data pulse train in real time without being limited by an electric response speed. CONSTITUTION:Reference light pulses 1 and the light data pulse train 2 are made into sheet beams 6 and 7 through a collimator lens 3 and separated into an upper and a lower part in an (x)-axial direction. The light data pulse train is reflected by brazed grating 5, but the wave fronts slant because of a difference in optical path length to cause time delay at both ends of the sheet beams. The optical path lengths of the reference pulses 6 and light data pulse train 7 are adjusted to match the wave fronts and they are made incident on a nonlinear optical medium 9 from a linear lens 8. Remarkable nonlinear optical effect is generated at the position where the individual wave fronts of both the light pulses are made incident on the medium 9 at the same time and output light affected by the nonlinear optical effect is detected as a space pattern by a photodetector array 10. As a result of the nonlinear optical effect, the generation position and modulation position of the output light correspond to time intervals of the individual pulses of time series data pulses, so the time series signal can be detected as the data pattern of the space train.
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