公开(公告)号：US20190267771A1

公开(公告)日：2019-08-29

申请号：US16281688

申请日：2019-02-21

Applicant: MITUTOYO CORPORATION

Inventor： Yusuke SHIRAKAWA

IPC: H01S3/13 ,  H01S3/136 ,  H01S3/10 ,  H01S3/139 ,  H01S3/16 ,  H01S3/04

Abstract: A laser light adjusting method includes detecting a pair of mode hops and a comparison saturated absorption line group of the pair of mode hops based on an intensity of a light output signal in response to a change applied to an actuator, comparing a mode center voltage value with a comparison voltage value which is the voltage value at which the comparison saturated absorption line group was generated; a control temperature adjustment process that increases a control temperature when the comparison voltage value is lower than the mode center voltage value, and that decreases the control temperature of the temperature adjuster when the comparison voltage value is greater than the mode center voltage value; and a laser light stabilization step that stabilizes an emission frequency of the laser light to a specific saturated absorption line after the control temperature adjustment process.

公开(公告)号：US20160240998A1

公开(公告)日：2016-08-18

申请号：US15042627

申请日：2016-02-12

Applicant: MITUTOYO CORPORATION

Inventor： Ryunosuke YANO ,  Yusuke SHIRAKAWA ,  Tatsuya NARUMI

IPC: H01S3/13

CPC classification number: H01S3/1305 ,  H01S3/1392

Abstract: A laser-frequency stabilizer includes: a light detector that converts a laser beam passing through an iodine cell to an optical output signal, an actuator that changes a resonator length in accordance with a received output voltage, and a control unit that controls the output voltage applied to the actuator. The control unit searches for a target saturated absorption line based on the optical output signal and, when the output voltage when the target saturated absorption line is found is within a normal voltage range that is predetermined corresponding to the target saturated absorption line, locks a oscillation frequency of the laser beam to the target saturated absorption line.

Abstract translation: 激光频率稳定器包括：将通过碘池的激光束转换为光输出信号的光检测器，根据接收的输出电压改变谐振器长度的致动器，以及控制单元，其控制输出电压 施加到致动器。 控制单元基于光输出信号搜索目标饱和吸收线，并且当发现目标饱和吸收线的输出电压在与目标饱和吸收线对应的预定正常电压范围内时，锁定振荡 激光束到目标饱和吸收线的频率。

公开(公告)号：US20190131759A1

公开(公告)日：2019-05-02

申请号：US16173350

申请日：2018-10-29

Applicant: MITUTOYO CORPORATION

Inventor： Yusuke SHIRAKAWA

IPC: H01S3/13 ,  H01S3/10 ,  H01S3/086

CPC classification number: H01S3/1303 ,  H01S3/005 ,  H01S3/025 ,  H01S3/0602 ,  H01S3/08027 ,  H01S3/086 ,  H01S3/09415 ,  H01S3/10069 ,  H01S3/109 ,  H01S3/1305 ,  H01S3/1392 ,  H01S2301/02

Abstract: A laser device includes an excitation light source, a resonator which receives excitation light from the excitation light source and generates laser light, an absorption cell to which the laser light is emitted, a light converter which converts the laser light passing through the absorption cell to a light output signal, a third order differential lock-in amplifier which generates a third order differential signal of the light output signal, and a controller. When a predetermined waveform of the third order differential signal is detected, the controller includes a return controller that determines a return direction of a resonator length based on the predetermined waveform and a resonator length controller that changes the resonator length to the return direction.