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    CRYSTAL SEALING CASE OF VARIABLE WAVELENGTH LASER DEVICE
    7.
    发明专利
    CRYSTAL SEALING CASE OF VARIABLE WAVELENGTH LASER DEVICE 失效

    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

    IPC: H01S3/108 ,  G02F1/39

    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.

    WAVELENGTH CALIBRATING APPARATUS FOR WAVELENGTH-TUNABLE LASER
    9.
    发明专利
    WAVELENGTH CALIBRATING APPARATUS FOR WAVELENGTH-TUNABLE LASER 失效

    公开(公告)号：JPS63184383A

    公开(公告)日：1988-07-29

    申请号：JP1580587

    申请日：1987-01-26

    Applicant: HAMAMATSU PHOTONICS KK

    Inventor： OSUMI YASUTSUGU ,  MORITA NOBUHIRO ,  SUZUKI HIDEO ,  KOBAYASHI YUJI ,  OBAYASHI YASUSHI ,  MATSUMOTO OSAMU

    IPC: H01S3/10 ,  H01S3/108

    Abstract: PURPOSE:To facilitate calibrating the wavelength scale of a wavelength reader for an output light and adjusting a light axis by a light axis regulator simultaneously by introducing a calibration light to the position of the light axis regulator in the latter stage of an optical parametric oscillator through a half mirror. CONSTITUTION:A continuous laser beam with a known wavelength, for instance the 2nd harmonic of an Nd-YAG laser device which is a laser beam with a wavelength of 530 nm, is generated and reflected and refracted by a half mirror 10 and transmitted through a light axis regulator 11 to a spectroscope 7. In the spectroscope 7, if there is a difference between a read sc ale value and the real wavelength of an inputted calibration light, the difference is calibrated. After the calibration in the spectroscope 7, a control signal is outputted and the crystal 5 of an optical parametric oscillator 6 is turned to vary the wavelength of the output light of the oscillator 6 so as to make the wavelength 530 nm which is equal to the wavelength of the calibration light in the spectroscope 7. As a discrepancy (d) of the light axis 8 of the output light is produced by the turn of the crystal 5, the calibration light is inputted so as to coincide with the cross point of the light from a wavelength calibration light source generator 18 axis 8 which is moved by the discrepancy (d) and the half mirror 10. Then a control signal is outputted from a light axis adjustment driving circuit 24 and the dielectric 17 of the light axis regulator 11 to adjust the light axis.

    WAVELENGTH-TUNABLE LASER APPARATUS
    10.
    发明专利
    WAVELENGTH-TUNABLE LASER APPARATUS 失效

    公开(公告)号：JPS63184382A

    公开(公告)日：1988-07-29

    申请号：JP1580387

    申请日：1987-01-26

    Applicant: HAMAMATSU PHOTONICS KK

    Inventor： KOBAYASHI YUJI ,  OSUMI YASUTSUGU ,  SUZUKI HIDEO ,  MORITA NOBUHIRO ,  MATSUMOTO OSAMU ,  OBAYASHI YASUSHI

    IPC: H01S3/10 ,  G02F1/39 ,  H01S3/108

    Abstract: PURPOSE:To obtain a stable output light without loss of a power density by a method wherein, even if an incident light misses the incident plane of a crystal, the crystal is moved by a transfer mechanism to correct the discrepancy and the matching conditions of the incident light are satisfied. CONSTITUTION:A part of the output of an optical parametric oscillator 6 is transmitted to a photosensor 22 and the position of a light axis is detected and the detected value is transmitted to a comparator 24. A datum obtained when there is no discrepancy of the light axis is supplied to the comparator 24 from a memory 23 and compared with the output of the light axis discrepancy caused by the rotation of a crystal 5 to output a signal corresponding to the discrepancy (h). If the discrepancy (h) becomes large to the extent that an incident light misses the incident plane of the crystal 5, a corresponding number of pulses are outputted from a calculator 25 and further transmitted to the linear pulse motor 18 of a transfer mechanism 16 through a pulse generator 20. Then a linearly-driven table is moved on linear guides 19 and 19 by the linear pulse motor 18 to correct the discrepancy of the incident light.

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