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    WAVELENGTH VARIABLE LASER DEVICE
    21.
    发明专利
    WAVELENGTH VARIABLE LASER DEVICE 失效

    公开(公告)号：JPS63159832A

    公开(公告)日：1988-07-02

    申请号：JP31007386

    申请日：1986-12-24

    Applicant: HAMAMATSU PHOTONICS KK

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

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

    Abstract: PURPOSE:To simultaneously output two laser beams of independent and variable wavelength by providing two optical parametric oscillators along the optical axis of an excitation light, and controlling the rotary angle of each non-linear optical crystal. CONSTITUTION:When a wavelength selecting signal is sent out to optical parametric oscillators 24, 25 through lines l1, l2 from a wavelength selecting circuit 45, the rotary angle of rotary shafts 30 and 32, and that of 40 and 42 are controlled to a prescribed angle respectively, and a phase matching angle of a non-linear optical crystal 31, and that of a non-linear optical crystal 41 are set to theta1 and theta2, respectively. Therefore, the oscillator 24 oscillates an optical parametric by the excitation light 22 of wavelength lambdap from a laser oscillator 21, and outputs the light beam 47 of lambda1s and lambda1i. Also, the oscillator 25 uses the transmission light of wavelength lambdap contained in the light beams 47, as an excitation light, executes a parametric oscillation through a collimator lens 37, and outputs the light beams 48 of wavelength lambda2s and lambda2i corresponding to the angle theta2. Also, in the output side of a filter 26, the light beams 49 of wavelength lambda1s and lambda2s appear simultaneously.

    WAVELENGTH-TUNABLE LASER DEVICE
    24.
    发明专利
    WAVELENGTH-TUNABLE LASER DEVICE 失效

    公开(公告)号：JPS63258087A

    公开(公告)日：1988-10-25

    申请号：JP9290787

    申请日：1987-04-15

    Applicant: HAMAMATSU PHOTONICS KK

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

    IPC: H01S3/10 ,  H01S3/109

    Abstract: PURPOSE:To obtain a device which can be easily and accurately made and altered in wavelength setting by a method wherein incident angles of both excited light of a light parametric oscillator and oscillating light of a harmonics generator are rendered to be coincident with set angles stored in memory respectively by controlling a driving means. CONSTITUTION:A parametric oscillator 21, a harmonics generator 22, a driving means 46 changing incident angle of excited light 23 incident on a nonlinear optical crystal 28 of the oscillator 21, a driving means 47 changing incident angle of oscillating light 31 incident on a non-linear optical crystal 34 of the harmonics generator 22, an angle detection circuit 41 detecting incident angle of the excited light 23, an angle detection circuit 42 detecting incident angle of oscillating light 31, a memory 43 storing incident angles of the excited light 23 and the oscillating light 31 corresponding to plural wavelengths as setting values, a wavelength selection circuit 44, and a computing control means 45 controlling the drive means 46 and 47 on the computed output obtained in such way wherein an incident angle corresponding to a selecting signal acquired from the circuit 44, which is compared with a detected incident angle and computed so as to output the computed result, are provided.

    VARIABLE WAVELENGTH LASER DEVICE
    25.
    发明专利
    VARIABLE WAVELENGTH LASER DEVICE 失效

    公开(公告)号：JPS63165826A

    公开(公告)日：1988-07-09

    申请号：JP31090786

    申请日：1986-12-27

    Applicant: HAMAMATSU PHOTONICS KK

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

    IPC: H01S3/10 ,  G02F1/37 ,  G02F1/39 ,  H01S3/108 ,  H01S3/109

    Abstract: PURPOSE:To prevent an optical axis from being sheared by providing the mirror to correct the shear of the optical axis generated at the time of turning a non- linear optical crystal face and moving the mirror. CONSTITUTION:A signal for obtaining a projecting laser beams with an objective wavelength lambda is inputted from an input terminal 25 to a CPU 23. The CPU 23 rotates the non-linear optical crystal 6 by a prescribed angle theta through a driving circuit 21 and a crystal driving part 12. Since the wavelength of the projecting laser beam is changed, the optical axis 13 is moved in parallel by a prescribed distance (d). Simultaneously, a signal corresponding to the parallel moving distance (d) is set from the CPU 23 to a driving circuit 22 in a mirror driving device 18 to rotate a mirror driving part 19. Since the mirror 14 is moved by the rotation and the moving distance (d) is corrected, an optical axis 26 after diffraction based upon the mirror 14 is always allowed to coincide. An optical axis 27 parallel with the optical axis 10 of the incident laser beam is obtained by reflecting the optical axis 26 by a mirror 20.

    CRYSTAL PROTECTION MECHANISM OF VARIABLE WAVELENGTH LASER DEVICE
    26.
    发明专利
    CRYSTAL PROTECTION MECHANISM OF VARIABLE WAVELENGTH LASER DEVICE 失效

    公开(公告)号：JPS63133686A

    公开(公告)日：1988-06-06

    申请号：JP28126986

    申请日：1986-11-26

    Applicant: HAMAMATSU PHOTONICS KK

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

    IPC: H01S3/10 ,  H01S3/108

    Abstract: PURPOSE:To prevent damage or breakdown of nonlinear optical crystal due to excessive power density of incident laser beam to nonlinear optical crystal by providing a particular half-mirror, a power density detector, a comparator and a light shielding mechanism. CONSTITUTION:A variable-wavelength laser device 11 which changes wavelength of laser beam 13a emitted therefrom by changing a relative incident angle for crystal surface of laser beam 13 incident to nonlinear optical crystal 16 is provided with a half-mirror 21 for branching the laser beam 13 incident to the nonlinear optical crystal 15, a power density detector 31 for detecting power density of branched laser beam 13, a comparator 33 for comparing a detected value of power density detector 31 with the present value and a light shielding mechanism 20 for shielding the laser beam 13 incident to the nonlinear optical crystal 16 based on an output of the comparator 33. The light shielding mechanism 20 is structured, for example, a shutter 26 adjacent to the optical axis of laser beam 13, a solenoid 30 to drive the shutter and a solenoid drive circuit 23 to drive the solenoid 30 based on an output of comparator 33.

    Space optical modulating tube
    27.
    发明专利
    Space optical modulating tube 失效
    空间光调制管

    公开(公告)号：JPS6146927A

    公开(公告)日：1986-03-07

    申请号：JP16864284

    申请日：1984-08-10

    Applicant: Hamamatsu Photonics Kk

    Inventor： HARA TSUTOMU ,  MORITA NOBUHIRO ,  OKAMOTO HIROSHI

    IPC: H01J31/50 ,  G02B7/00 ,  G02F1/03 ,  G02F1/05

    Abstract: PURPOSE: To obtain a space optical modulating tube which can execute a coherent operation without a trouble by providing plural slots on one end face of a cylindrical spacer, sticking a crystal part to its end face, and sticking the other end face to the inside wall of an output surface of a vacuum vessel.
    CONSTITUTION: Plural slots 20a are provided on one end face of a cylindrical spacer 20, an electro-optical crystal 8 of LiNbO
    3 , etc. is stuck by an epoxy compound adhesive agent, etc., and the other end face is stuck and fixed to a glass surface plate 12 of a vacuum vessel 3 for forming an output surface of a space optical modulating tube. In such a way, a "0"-order component on a Fourier transforming surface of the time when a lens whose focal distance is 1,000mm has been used becomes a circular spot shape, therefore, no influence is exerted on a higher order component, and a coherent optical operation is executed easily. Also, a deformation caused by a difference of coefficients of thermal expansion of the crystal 8 and the spacer 20 is absorbed by the slot part 20a, therefore, a distortion is scarcely generated in the crystal 8, and an optical operation processing is executed easily.
    COPYRIGHT: (C)1986,JPO&Japio

    Abstract translation: 目的：为了获得可以通过在圆柱形间隔件的一个端面上设置多个槽而无故障执行相干操作的空间光学调制管，将晶体部分粘附到其端面，并将另一端面粘贴到内壁 的真空容器的输出表面。 构成：多个槽20a设置在圆筒形间隔物20的一个端面上，LiNbO 3等的电光晶体8被环氧化合物粘合剂等粘合，另一个端面固定在 用于形成空间光学调制管的输出表面的真空容器3的玻璃表面板12。 以这种方式，当焦距为1000mm的透镜的时间的傅立叶变换表面上的“0”阶分量。 已经被使用成为圆形斑点形状，因此不会对高阶分量产生影响，并且容易执行相干光学操作。 此外，由晶体8和间隔物20的热膨胀系数的差异引起的变形被槽部20a吸收，因此在晶体8中几乎不产生变形，并且容易进行光学运算处理。

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