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公开(公告)号：JPH05289134A
公开(公告)日：1993-11-05
申请号：JP9119892
申请日：1992-04-10
Applicant: SONY CORP
Inventor： WATANABE KENJIRO , YAMADA MASAHIRO , NADA NAOJI , MATSUMOTO SHUICHI , KOGA YUJI , KIJIMA KOUICHIROU
Abstract: PURPOSE:To obtain a non-linear optical device which has high efficiency and superior output characteristics efficiently in manufacturing and with high yield by forming periodic domain structure in a ferroelectric substance. CONSTITUTION:Periodic domain structure adapted to a wavelength of a fundamental wave light source 5 is formed in a state in which the light source 5 is optically coupled to a ferroelectric substance 1 having a light waveguide path. Therefore, since period domain structure having an optimum period can be formed independently of dispersion of oscillation wavelength of the light source 5 for instance a semiconductor laser, a nonlinear optical device which has high conversion efficiency and superior output characteristics for instance short wavelength light source can be constituted. And after the light waveguide path 2 is formed, periodic domain structure is formed, but the light waveguide path 2 previously formed can be formed so as not to be affected any by adopting a method in which reversal of domain can be performed at a low temperature in forming this periodic domain structure.
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公开(公告)号：JPH05289133A
公开(公告)日：1993-11-05
申请号：JP9119792
申请日：1992-04-10
Applicant: SONY CORP
Inventor： KIJIMA KOUICHIROU , YAMADA MASAHIRO
Abstract: PURPOSE:To obtain a stable optical waveguide-type device for converting wavelength with a high conversion efficiency by providing a periodic structure for reversing polarization on a multimode optical waveguide core coated around with a clad layer. CONSTITUTION:The periodic structure for reversing polarization 3 composed of ferroelectric substance is provided on a multimode optical waveguide core 2 coated around with a clad layer 1. The semiconductor laser with single transverse mode is mechanically integrated opposing adjecently to the light incident end of the optical waveguide-type element for converting wavelength 4 coated with the clad layer 1 around the multimode optical waveguide core 2 composed of ferroelectric substance. Consequently, by making a phase adjusting wavelength to form a polarization reversing structure having a period matched with a zero-order mode, the margin of a core diameter with respect to the phase matching wavelength, i.e., the degree of coating is largely extended. Thus the yield is improved and the stable optical waveguide-type device for converting wavelength with required characteristic and a high conversion efficiency is obtained.
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公开(公告)号：JPH05289132A
公开(公告)日：1993-11-05
申请号：JP9119692
申请日：1992-04-10
Applicant: SONY CORP
Inventor： KIJIMA KOUICHIROU , YAMADA MASAHIRO
Abstract: PURPOSE:To improve mass-productivity and characteristic by forming an optical waveguide element so that the distance from the surface to the center axis at the light incident end of the waveguide is coincident with the distance from the surface of a semiconductor laser to the center axis at an emitting end. CONSTITUTION:The optical waveguide element 21 provided an optical waveguide on a ferroelectric substance 12 and the semiconductor laser 1 are mechanically integrated by opposing adjacently the emitting end 2a of the semiconductor laser to the light incident end 15a of the optical waveguide. The distance H2 from the surface 21a of the optical waveguide element 21 to the center axis of the light incident end 15a of the optical waveguide is made coincident with the distance H1 from the surface 1a of the semiconductor laser 1 to the emitting end. Consequently, by juxtaposing both on the substrate 32 on the common plane, since the center axis of the emitting end 2a of the semiconductor laser 1 is made coincident with the axis of the light incident end 15a of the optical waveguide in the optical waveguide element 21 at least in height, i.e., in the vertical position, positioning of both axes is simplified.
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公开(公告)号：JPH04335620A
公开(公告)日：1992-11-24
申请号：JP10739291
申请日：1991-05-13
Applicant: SONY CORP
Inventor： TAGUCHI AYUMI , YAMADA MASAHIRO , KAWAKUBO SHIN , KIJIMA KOUICHIROU
Abstract: PURPOSE:To form a polarization inversion structure without causing the surface contamination, refractive index variation, crystal breakage, etc., of a ferroelectric material. CONSTITUTION:On the ferroelectric material 10 after single polarization, 1st and 2nd electrodes 1 and 2 are arranged in the polarizing direction and at least the 1st electrode 1 is formed in pattern corresponding to the pattern of polarization inversion structure which is obtained finally; and a voltage of 1-100kV/mm is applied between the 1st and 2nd electrodes 1 and 2 so that a negative potential is applied to the negative side of self-polarization of the ferroelectric material 10 and a positive potential is applied to the positive size, thus forming the polarization inversion structure.
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公开(公告)号：JPH04296830A
公开(公告)日：1992-10-21
申请号：JP6347291
申请日：1991-03-27
Applicant: SONY CORP
Inventor： NADA NAOJI , TAGUCHI AYUMI , KIJIMA KOUICHIROU
Abstract: PURPOSE:To ensure phase adjustment by matching temperature characteristic of phase adjusting wavelength and temperature characteristic of the wavelength of semiconductor laser with each other. CONSTITUTION:An optical second harmonic generating device, or SHG device 2 having a phase adjustment means 1, i.e., a refractive factor cyclic pattern or a domain reversal cyclic pattern, and a semiconductor laser 3 of its basic wave light source are provided. The temperature characteristic of the phase adjustment wavelength of the SHG device 2 and the temperature characteristic of the oscillating wavelength of the semiconductor laser 3 are almost identical in that the same temperature characteristic is obtained in a predetermined operating temperature region. By diffusing Ti and so on preferentially on a primary surface 4a of a non-linear optical crystal 4 comprising Z-plate of LN of mono-region, as indicated by an arrow (a), a phase adjustment means 1 by means of cyclic polarization reversal is formed. Otherwise, by forming a local electric field and whereby reversing the electrode, a phase adjustment means 1 by means of polarization reversal cyclic pattern is formed.
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Patent Agency Ranking
公开(公告)号：JPH0419719A
公开(公告)日：1992-01-23
申请号：JP12478690
申请日：1990-05-15
Applicant: SONY CORP
Inventor： YAMADA MASAHIRO , KIJIMA KOUICHIROU
Abstract: PURPOSE:To easily form a periodic domain inversion structure part which has a fine pitch with high accuracy without causing variation in refractive index by arranging a 1st and a 2nd electrode opposite each other on the mutually opposite main surfaces of a nonlinear ferrodielectric optical material body which is formed into a single domain, and applying a pulse voltage between those electrodes and performing domain control. CONSTITUTION:On the mutually opposite main surfaces of the nonlinear ferrodielectric optical material body 1 which is made into the single domain, the 1st and 2nd electrodes 11 and 12 are provided directly opposite each other. At least one of those opposite electrodes 11 and 12 is formed on a necessary electrode pattern, i.e. the domain inversion part according to the pattern and the necessary pulse voltage is applied between those the opposite electrodes 11 and 12 to perform the domain control which locally forms the domain inversion part 3 in pattern corresponding to the electrode pattern. Consequently, the fine pitch and pattern can be formed with high accuracy, and the applied pulse voltage is controlled to easily perform thickness control over an inverted domain with high accuracy.
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37.发明专利
公开(公告)号：JPH11259904A
公开(公告)日：1999-09-24
申请号：JP5679698
申请日：1998-03-09
Applicant: SONY CORP
Inventor： KIJIMA KOUICHIROU , YAMAMOTO KENJI , OSATO KIYOSHI
Abstract: PROBLEM TO BE SOLVED: To provide an optical disk information detecting device detecting optical disk information in an objective lens and an optical disk existing in an optical contact state and an optical disk device using it. SOLUTION: An objective lens 13a and an optical disk 11 are in an optical contact state, and a numerical aperture is constituted to 1 or above. At this time, a light source 22 irradiating a light beam L1 on the optical disk 11 through the objective lens 13a, a photodetcting means 23 detecting return light from the optical disk 11 and a processing circuit 24 detecting optical disk information recorded on a recessed part 11a formed on the optical disk 11 based on the detection signal of the return light from the photodetecting means 23 are provided.
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公开(公告)号：JPH11259882A
公开(公告)日：1999-09-24
申请号：JP5679798
申请日：1998-03-09
Applicant: SONY CORP
Inventor： KIJIMA KOUICHIROU , KAWAKUBO SHIN , OSATO KIYOSHI
Abstract: PROBLEM TO BE SOLVED: To eliminate the need for an initializing process for converting the recording film of a phase transition optical disk into a crystal state. SOLUTION: This optical disk is equipped with a rotary driving means which drives and rotates the phase transition optical disk 11, an optical pickup which irradiates the rotating optical disk with light through a light converging means 13a and detects return light from the recording surface of the optical disk by an optical detector through the light converging means, an actuator which supports a light spot converged on the optical disk by the light converging means movably in a tracking direction, a signal processing circuit which generates a reproduced signal according to the detection signal from the optical detector, and a servo circuit which moves the light spot converted on the optical disk by the light converging means in the tracking direction, and the light converging means is supported by a holding means 21 which is held at a specific distance to the optical disk.
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公开(公告)号：JPH11232717A
公开(公告)日：1999-08-27
申请号：JP2697598
申请日：1998-02-09
Applicant: SONY CORP
Inventor： KIJIMA KOUICHIROU , KOCHIYAMA AKIRA , TANAKA KAYOKO
IPC: G11B11/10 , G11B11/105
Abstract: PROBLEM TO BE SOLVED: To increase a recording density by reducing the thickness of a recording medium. SOLUTION: This optical recording device is provided with a light generating means for generating a light projected to a recording medium 1 using a magneto-optical effect, light converging means 41 and 43 for converging lights generated by the light generating means on the recording medium 1, and a field generating means 42 for generating a magnetic field to be applied to the recording medium 1. An optical path of a light converged on the recording medium 1 is formed so that a diameter formed in the field generating means 42 includes a through-hole 55 of 150 μm or less.
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公开(公告)号：JPH10138508A
公开(公告)日：1998-05-26
申请号：JP29417396
申请日：1996-11-06
Applicant: SONY CORP
Inventor： KIJIMA KOUICHIROU , ANDO MASATO , MURAKAMI TAKAAKI
Abstract: PROBLEM TO BE SOLVED: To well perform gradation expression especially on low density side anging from the low density side to a high density side by performing the determination of a determination medium at the time of the mixing and emission of the determination medium and an emitting medium by heating elements. SOLUTION: Pressure is applied to the determination medium in a determination medium pressure chamber by a first pressure applying means to mix the determination medium with the emitting medium in the emitting medium nozzle communicating with an emitting medium pressure chamber filled with the emitting medium and pressure is applied to the emitting medium in the emitting medium pressure chamber by a second pressure applying means to emit mixed liquid droplets of the determination medium and the emitting medium. In this case, at least the first pressure applying means is set to a heating element arranged toward the determination medium within the determination medium pressure chamber and one or more projection part is arranged on the heating element toward the determination medium. The determination medium nozzle may be provided so as to be opened in the state adjacent to the emitting medium nozzle and the determination medium may be allowed to exude from the determination medium nozzle to the emitting medium nozzle to be mixed with the emitting medium in the emitting medium nozzle.
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