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公开(公告)号：GB2175087A
公开(公告)日：1986-11-19
申请号：GB8608771
申请日：1986-04-10
Applicant: HAMAMATSU PHOTONICS KK
Inventor： OSUMI YASUTSUGU , KATO TAKAHITO
Abstract: A compact laser gyrosystem comprises a main gyrostructure 1 of cylindrical configuration and having an internally reflecting surface 1a. Entrance and exit planes 1b and 1 c are defined in the gyrostructure and a beam splitter 2 is positioned therebetween. Light from laser source 3 is split by the beam splitter and follows two polygonal paths within the gyrostructure in opposite directions, emerging to respective detectors 4 and 5. Rotation of the gyrostructure about its axis results in the movement of interference fringes which are detected by the detectors, and arithmetic logic unit 6 calculates the angular velocity. The number of turns made by both laser beams inside the gyrostructure 1 can be altered by changing the angle of incidence of the laser beam on the gyrostructure.
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公开(公告)号：FR2580390A1
公开(公告)日：1986-10-17
申请号：FR8605123
申请日：1986-04-10
Applicant: HAMAMATSU PHOTONICS KK
Inventor： OSUMI YASUTSUGU , KATO TAKAHITO
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公开(公告)号：FR2580390B1
公开(公告)日：1992-05-15
申请号：FR8605123
申请日：1986-04-10
Applicant: HAMAMATSU PHOTONICS KK
Inventor： OSUMI YASUTSUGU , KATO TAKAHITO
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公开(公告)号：GB2175087B
公开(公告)日：1988-10-12
申请号：GB8608771
申请日：1986-04-10
Applicant: HAMAMATSU PHOTONICS KK
Inventor： OSUMI YASUTSUGU , KATO TAKAHITO
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公开(公告)号：DE3611980A1
公开(公告)日：1986-10-16
申请号：DE3611980
申请日：1986-04-09
Applicant: HAMAMATSU PHOTONICS KK
Inventor： OSUMI YASUTSUGU , KATO TAKAHITO
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Patent Agency Ranking
公开(公告)号：JPS63133687A
公开(公告)日：1988-06-06
申请号：JP28127086
申请日：1986-11-26
Applicant: HAMAMATSU PHOTONICS KK
Inventor： URA TADAHISA , SUZUKI HIDEO , OSUMI YASUTSUGU , MORITA NOBUHIRO , MATSUMOTO OSAMU , KOBAYASHI YUJI , OBAYASHI YASUSHI
Abstract: PURPOSE:To prevent displacement of output laser beam position by changing an angle formed by the optical axis of laser beam and optical axis through formation of curved external surface of window for inputting or outputting laser beam of device including an arc centered to the intersecting point of the optical axis of nonlinear optical crystal and optical axis of laser beam. CONSTITUTION:A nonlinear optical crystal 11 and a case 12 for sealing the crystal 11 are formed integrally and wavelength of laser beam 25a emitted is changed by changing an angle formed by the optical axis 26 of laser beam 25 incident to the non-linear optical crystal 11 and optical axis of the nonlinear optical crystal 11. In this waveform variable laser device, the external circumference of windows 21, 22 for inputting and outputting laser beams 25, 25a of case 12 is formed as the curved surface including the arc centered at the intersecting point of the optical axis of nonlinear optical crystal 11 and optical axis 26 of laser beam 25. The external circumference of windows 21, 22 for inputting and outputting laser beams 25, 25a of the case 12 is formed, for example, in cylindrical having the center axis of the rotating axis 13 of case 12, or formed as the spherical surface centered on the intersecting point of the rotating axis 13 of case 12 and the optical axis 26 of the laser beam 25.
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公开(公告)号：JPS6275944A
公开(公告)日：1987-04-07
申请号：JP21384685
申请日：1985-09-27
Applicant: HAMAMATSU PHOTONICS KK
Inventor： OSUMI YASUTSUGU , KOBAYASHI YUJI
Abstract: PURPOSE:To read and write to an optical information recording media and the media to satisfy the request for increasing in a recording information quantity by arranging >=2 heat modes recording media which sandwiches the isotropic media and different in polarizing direction. CONSTITUTION:The laser beam of a laser diode 21A is made thin through a half mirror 24 and a lens system 25, and polarizing films 11A and 11B of a substrate 10 are irradiated to optical information recording media 1 stuck orthogonally in the deflecting direction. A film 11B surface is quickly heated, at such a time, the hole is formed at the optical beam spot part, changed so as to pass through the light, the signal is recorded, and on the other hand, at the film 11A, the optical beam energy is transmitted and remains as it does. In the same way, the film 11B remains by a laser diode 21B, the hole of the film 11A is opened and through the light, the polarizing component of the film 11B remains. Thus, by making the hole on films 11A and 11B surfaces, the information can be selectively recorded on two surfaces.
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公开(公告)号：JPH01178938A
公开(公告)日：1989-07-17
申请号：JP33371287
申请日：1987-12-29
Applicant: HAMAMATSU PHOTONICS KK
Inventor： SUZUKI HIDEO , OSUMI YASUTSUGU , MORITA NOBUHIRO , MATSUMOTO OSAMU , KOBAYASHI YUJI , OBAYASHI YASUSHI
IPC: G02F1/39
Abstract: PURPOSE:To vary the angle of the optical axis of exciting light to the optical axis of nonlinear optical crystal and to vary the output wavelength of oscillation light at a high speed by deflecting the exciting light by an optical deflector which utilizes the optoelastic effect of an optical material. CONSTITUTION:When specific electric power is supplied to the oscillator 13 of the optical deflector 10 and its oscillation frequency is varied within a specific range, the exciting light 5a changes its traveling direction and is deflected into exciting light 5b. Consequently, the light is reflected and converged by one focusing mirror 16, the angle ph of phase matching between the optical axis 19 of the exciting light 5b entering the nonlinear optical crystal 3 through an incidence mirror 14 and the optical axis 8 of the nonlinear optical crystal 3 varies, and the oscillation light 18 projected through a projection mirror 15 varies in wavelength corresponding to said variation. This utilizes the optoelastic effect of the optical material such as acoustooptic effect and electrooptic effect. Consequently, the deflecting speed of the exciting light 5a is increased to facilitate fast variation in the output wavelength of the oscillation light 18 and also eliminate the need for a crystal rotational mechanism.
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公开(公告)号：JPS63185084A
公开(公告)日：1988-07-30
申请号：JP1754687
申请日：1987-01-28
Applicant: HAMAMATSU PHOTONICS KK
Inventor： KOBAYASHI YUJI , OBAYASHI YASUSHI , SUZUKI HIDEO , OSUMI YASUTSUGU , MORITA NOBUHIRO , MATSUMOTO OSAMU
Abstract: PURPOSE:To obtain an optical wavelength tunable laser without the large rotary angle of a crystal for an optical wavelength converter, by providing a second optical parametric oscillator having a specified function on the incident side of the optical wavelength converter. CONSTITUTION:When a crystal 6a for a first optical parametric oscillator (OPO) is excited with pumping lights, normal light and anomalous light are emitted when the angle (theta) of the crystal 6a is 90 degrees. Of the output light of the first OPO 1a, the pumping light is inputted into a 1/2 wavelength plate 27, and the direction of the polarized light is turned by 90 degrees. A crystal 6b for a second OPO 1b is provided at a position, which is orthogonally intersected with the crystal 6a for the first OPO. Therefore the pumping light becomes the normal light with respect to the crystal 6b for the second OPO. The phase is aligned with respect to the turning direction in a vertical plane. The signal light and the idler light, whose polarizing directions are orthogonally intersected with the output light of the first OPO 1a, are outputted. The output light from the first OPO 1a and the output light from the second OPO 1b are combined and inputted into an SHG 2. Then the normal light within a specified range with respect to a crystal 9 for the SHG is obtained. Said normal light becomes a wavelength tunable laser beam by the rotation of the crystal 9 for the SHG by 50-90 degrees.
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公开(公告)号：JPS63170619A
公开(公告)日：1988-07-14
申请号：JP255287
申请日：1987-01-08
Applicant: HAMAMATSU PHOTONICS KK
Inventor： KOBAYASHI YUJI , OBAYASHI YASUSHI , SUZUKI HIDEO , OSUMI YASUTSUGU , MORITA NOBUHIRO , MATSUMOTO OSAMU
Abstract: PURPOSE:To obtain a wavelength variable laser beam with high efficiency, and also, a stable oscillation, by enclosing a non-linear optical crystal so as to be turnable in a container, changing the incident angle of an excited light to a crystal axis by turning only this enclosed non-linear optical crystal, and changing the wavelength of an oscillation light. CONSTITUTION:A third harmonic laser beam (wavelength lambdap=355nm) of an Nd-YAG laser is inputted as the excited light 35, an oscillation light 36 consisting of a signal (wavelength lambdas) and an idler (wavelength lambdai) is generated by an optical parametric oscillation. When the incident angle of the excited light 35 to a crystal axis is changed by turning a non-linear optical crystal 24 around the center axis 37 in the direction as indicated with an arrow by driving a stepping motor 14, the wavelengths (lambdas, lambdai) of the oscillation light 36 are changed continuously within a prescribed range (for instance, 500-1,230nm). In such a way, a distance between mirrors 31, 32 (cavity length) can be made as short as possible, and a stable oscillation light can be obtained with high efficiency.
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