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公开(公告)号：US5144636A
公开(公告)日：1992-09-01
申请号：US647022
申请日：1991-01-29
CPC分类号： G02B6/425 , G02B6/34 , H01S5/4025
摘要： A laser beam oscillating apparatus which includes a plurality of semiconductor laser beam oscillators (21, 22, 23) oscillating laser beams of a different wavelength from each other, an optical waveguide (12) formed on a substrate (11) so that the oscillated laser beams propagate therein and are then emitted in the same direction from the output end thereof and an optical coupler (13) to introduce the laser beams into the optical waveguide, thus allowing simultaneous introduction of these semiconductor laser beams of different wavelengths into the optical waveguide and simultaneous output of them in the same direction from the output end thereof.
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公开(公告)号：US5033812A
公开(公告)日：1991-07-23
申请号：US481369
申请日：1990-02-16
申请人： Toshihiko Yoshida , Osamu Yamamoto
发明人： Toshihiko Yoshida , Osamu Yamamoto
摘要： A grating coupler comprising an optical waveguide and a grating formed on the optical waveguide in which light is propagated for optically coupled light rays inside and outside of the optical waveguide, wherein the coupling coefficient of the grating coupler is gradually changed in the direction of propagation of guided light in the optical waveguide, whereby the intensity distribution of light rays inside or outside of the optical waveguide agrees with the coupling efficiency distribution of the grating coupler, so the coupling efficiency of the grating coupler can be greatly improved.
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公开(公告)号：US4945525A
公开(公告)日：1990-07-31
申请号：US239753
申请日：1988-09-02
CPC分类号： G11B7/1384 , G11B7/124
摘要： An optical information processing apparatus including a substrate of a transparent material, first and second optical waveguides formed on opposite faces of said transparent substrate, a light introducing device for introducing reflected light from an information writing medium into the first and second optical waveguides, and a detecting device for detecting reproduction signal, tracking error signal and focusing error signal based on the reflected light introduced into the first and second optical waveguides.
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公开(公告)号：US5450237A
公开(公告)日：1995-09-12
申请号：US300070
申请日：1994-09-02
申请人： Toshihiko Yoshida , Osamu Yamamoto , Saburo Yamamoto , Shohichi Kato , Masumi Nakamichi , Toshimasa Hamada , Sadayoshi Matsui
发明人： Toshihiko Yoshida , Osamu Yamamoto , Saburo Yamamoto , Shohichi Kato , Masumi Nakamichi , Toshimasa Hamada , Sadayoshi Matsui
CPC分类号： G11B7/1374 , G02B27/58 , G11B7/123 , G11B7/1381
摘要： A hyper-resolution optical device which can focus a beam of light to a diameter less than the diffraction limit. The optical device has an optical system disposed on a transmissive substrate. One component in the optical system is a hyper-resolution optical component which passes or reflects light and which has a central portion which does not pass or reflect light, respectively. The hyper-resolution optical component can be integrated with the transmissive substrate. Such optical devices are particularly suitable for optical pick-up devices, laser printers, sensors.
摘要翻译： 可以将光束聚焦到小于衍射极限的直径的超分辨率光学装置。 光学装置具有设置在透射基板上的光学系统。 光学系统中的一个部件是通过或反射光的超分辨率光学部件，并且具有不分别通过或反射光的中心部分。 超分辨率光学部件可以与透射基板一体化。 这种光学装置特别适用于光学拾取装置，激光打印机，传感器。
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5.发明授权Light wavelength converter for a wavelength of laser beams into a short wavelength 失效激光波长波长波长变化的光波长变换器
公开(公告)号：US5224195A
公开(公告)日：1993-06-29
申请号：US723500
申请日：1991-06-28
CPC分类号： G02F1/377 , G02F2001/374 , G02F2201/302
摘要： A light wavelength converter which includes a laser beam source for radiating fundamental waves, a first optical waveguide formed on a substrate so as to convert the fundamental waves into harmonics which are radiated through the substrate, a grating coupler provided on the substrate so as to receive the harmonics propagated through the substrate, and a second optical waveguide formed on the substrate, the second optical guide being connected to the grating coupler so as to radiate the harmonics outside.
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6.发明授权Optical pumping-type solid-state laser apparatus with a semiconductor laser device 失效具有半导体激光装置的光泵浦式固态激光装置
公开(公告)号：US5025449A
公开(公告)日：1991-06-18
申请号：US500039
申请日：1990-03-27
申请人： Osamu Yamamoto , Toshihiko Yoshida
发明人： Osamu Yamamoto , Toshihiko Yoshida
IPC分类号： H01S3/094 , H01S3/0941 , H01S3/131 , H01S5/024 , H01S5/06 , H01S5/0683
CPC分类号： H01S5/0683 , H01S3/09415 , H01S3/09408 , H01S3/1312 , H01S5/02415 , H01S5/06837 , H01S5/0687
摘要： Disclosed is an optical pumping-type solid-state laser apparatus in which a semiconductor laser device is used as a light source for optical pumping. The solid-state laser apparatus includes first and second photodetectors. The former detects the amount of light emitted from the semiconductor laser device, and the latter detects the amount of laser light transmitted through a filter plate which has the same light-absorbance characteristics as that of the solid-state laser. In accordance with the detected results, a driving circuit drives the semiconductor laser device to obtain a laser beam with an appropriate output level and a temperature regulator regulates the temperature of the semiconductor laser device so that the wavelength of the laser light to be emitted therefrom is accurately adjusted to be the same as that of the light to be efficiently absorbed by the solid-state laser. The laser beam with the accurately adjusted wavelength is used for optically pumping the solid-state laser.
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公开(公告)号：US5007694A
公开(公告)日：1991-04-16
申请号：US457320
申请日：1989-12-28
申请人： Osamu Yamamoto , Toshihiko Yoshida
发明人： Osamu Yamamoto , Toshihiko Yoshida
CPC分类号： G02F1/377
摘要： A light wavelength converter comprising a substrate that is made of a material attaining a non-linear effect; an optical waveguide that is formed within said substrate; a light source that irradiates said optical waveguide with a pair of lights having a fundamental waveguide, said pair of lights being propagated within said optical waveguide and intersecting each other within said optical waveguide to thereby generate a second harmonic light; and a light deflection means that changes the intersection angle between the pair of waveguiding lights based on an electric signal that is input into said light deflection means, whereby, the phase matching condition of a pair of incident laser beams can be readily satisfied and, even when the ambient temperature changes, the second harmonic light can be stably generated.
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8.发明授权Nonlinear optical waveguide device including grating for changing of the wavelength of light 失效包括用于改变光的波长的光栅的非线性光波导装置
公开(公告)号：US4852961A
公开(公告)日：1989-08-01
申请号：US251564
申请日：1988-09-30
申请人： Osamu Yamamoto , Toshihiko Yoshida
发明人： Osamu Yamamoto , Toshihiko Yoshida
CPC分类号： G02F1/377 , G02F2001/374 , G02F2201/302
摘要： A device for the changing of the wavelength of light comprising a non-linear optical crystal, first and second optical waveguides that are formed in the non-linear optical crystal, and an introducing means that is positioned adjacent to the second optical waveguide, the light being incident upon the first optical waveguide and propagated within the first optical waveguide, resulting in harmonic light that satisfies the phase-matching conditions, and the harmonic light being introduced, by the introducing means, into the second optical waveguide from which the harmonic light is output.
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公开(公告)号：US5109462A
公开(公告)日：1992-04-28
申请号：US577651
申请日：1990-09-05
CPC分类号： G02F1/377 , G02F2001/374
摘要： A light wavelength converter which includes a light source for emitting fundamental waves having a desired wavelength, a first loop-shaped optical waveguide for converting the fundemental waves into harmonics, and a second optical waveguide for receiving the light from the source, wherein the two waveguides are coupled by an optical directional coupler.
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公开(公告)号：US5046802A
公开(公告)日：1991-09-10
申请号：US498573
申请日：1990-03-26
申请人： Osamu Yamamoto , Toshihiko Yoshida
发明人： Osamu Yamamoto , Toshihiko Yoshida
CPC分类号： G02F1/377 , G02F1/3534 , G02F2001/374
摘要： A light wavelength converter comprising a substrate that is made of a material with a non-linear optical effect, and a loop-shaped optical waveguide that is formed on the substrate, whereby a second harmonic wave or a sum wave emanates from a fundamental wave that has been propagated in a specific area of the optical waveguide and part of the fundamental wave that has not been converted to the second harmonic wave or the sum wave is returned to the specific area of the optical waveguide, so that a fundamental wave with a relatively low output can be efficiently converted to a second harmonic wave and a high-output second harmonic wave can be obtained.
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