公开(公告)号：EP0196856A3

公开(公告)日：1988-06-15

申请号：EP86302174

申请日：1986-03-25

申请人： TOKYO GAS CO., LTD.

发明人： Uehara, Kiyoji ,  Ueki, Takashi ,  Tanaka, Hiroaki ,  Tai, Hideo

IPC分类号： H01S03/105 ,  H01S03/106 ,  H01S03/139

CPC分类号： H01S5/14 ,  H01S3/0809 ,  H01S3/105 ,  H01S3/1061 ,  H01S3/1392 ,  H01S5/06832 ,  H01S5/4087 ,  H01S2301/04

摘要： @ There is disclosed a dual-wavelength laser apparatus including a laser emitting a laser beam consisting of two wavelength components, a methane cell for controlling and equalizing gains of the two wavelength components, a cavity length modulator including a piezoelectric element for periodically modulating the cavity length of the laser, and a feedback circuit for controlling the modulation center such that the sum of outputs of the two modulated wavelength components is kept substantially constant. The feedback circuit includes a detector for detecting a laser output, a lock-in amplifier for detecting and amplifying an output from the detector, an integrator for integrating an output from the lock-in amplifier, and a high-voltage amplifier for generating a bias voltage set by the integrator.

公开(公告)号：EP0196856B1

公开(公告)日：1990-12-27

申请号：EP86302174.7

申请日：1986-03-25

申请人： TOKYO GAS CO., LTD.

发明人： Uehara, Kiyoji ,  Ueki, Takashi ,  Tanaka, Hiroaki ,  Tai, Hideo

IPC分类号： H01S3/105 ,  H01S3/106 ,  H01S3/139 ,  G01N21/25

CPC分类号： H01S5/14 ,  H01S3/0809 ,  H01S3/105 ,  H01S3/1061 ,  H01S3/1392 ,  H01S5/06832 ,  H01S5/4087 ,  H01S2301/04

公开(公告)号：EP0196856A2

公开(公告)日：1986-10-08

申请号：EP86302174.7

申请日：1986-03-25

申请人： TOKYO GAS CO., LTD.

发明人： Uehara, Kiyoji ,  Ueki, Takashi ,  Tanaka, Hiroaki ,  Tai, Hideo

IPC分类号： H01S3/105 ,  H01S3/106 ,  H01S3/139 ,  G01N21/25

CPC分类号： H01S5/14 ,  H01S3/0809 ,  H01S3/105 ,  H01S3/1061 ,  H01S3/1392 ,  H01S5/06832 ,  H01S5/4087 ,  H01S2301/04

摘要： @ There is disclosed a dual-wavelength laser apparatus including a laser emitting a laser beam consisting of two wavelength components, a methane cell for controlling and equalizing gains of the two wavelength components, a cavity length modulator including a piezoelectric element for periodically modulating the cavity length of the laser, and a feedback circuit for controlling the modulation center such that the sum of outputs of the two modulated wavelength components is kept substantially constant. The feedback circuit includes a detector for detecting a laser output, a lock-in amplifier for detecting and amplifying an output from the detector, an integrator for integrating an output from the lock-in amplifier, and a high-voltage amplifier for generating a bias voltage set by the integrator.

摘要翻译： 公开了一种双波长激光装置，包括：发射由两个波长分量组成的激光束的激光器，用于控制和均衡两个波长分量的增益的甲烷单元;腔长调制器，包括用于周期性调制腔长度的压电元件 以及用于控制调制中心的反馈电路，使得两个调制波长分量的输出之和保持基本上恒定。 反馈电路包括用于检测激光输出的检测器，用于检测和放大来自检测器的输出的锁定放大器，用于对来自锁定放大器的输出进行积分的积分器和用于产生偏置的高压放大器 由积分器设定的电压。

公开(公告)号：EP0449573A3

公开(公告)日：1993-01-13

申请号：EP91302619.1

申请日：1991-03-26

申请人： TOKYO GAS CO., LTD.

发明人： Uehara, Kiyoji ,  Tanaka, Hiroaki ,  Matsuura, Masayuki ,  Tai, Hideo

IPC分类号： G01N21/39 ,  H01S3/025 ,  G02B3/00

CPC分类号： G02B3/00 ,  G01N21/39 ,  G01N2021/399

摘要： There is disclosed a gas detection device comprising :-
a laser which generates a laser beam of a wave length and intensity corresponding to a drive current and the temperature;
   a laser drive circuit which modulates the drive power source of the laser at a specified amplitude centered around a specified temperature and a specified current value;
   a means of stabilizing the wavelength by which the central wavelength of the laser beam generated by the laser is stabilized at a specific position on a special gas absorption line;
   a beam detection apparatus (6) which detects the intensity of the laser beam after the laser beam passes through the measuring object gas atmosphere; and
   a measuring means which performs a quantitative measurement of a specific gas based on the output of the beam detection apparatus.

公开(公告)号：EP0449573A2

公开(公告)日：1991-10-02

申请号：EP91302619.1

申请日：1991-03-26

申请人： TOKYO GAS CO., LTD.

发明人： Uehara, Kiyoji ,  Tanaka, Hiroaki ,  Matsuura, Masayuki ,  Tai, Hideo

IPC分类号： G01N21/39 ,  H01S3/025 ,  G02B3/00

CPC分类号： G02B3/00 ,  G01N21/39 ,  G01N2021/399

摘要： There is disclosed a gas detection device comprising :-
a laser which generates a laser beam of a wave length and intensity corresponding to a drive current and the temperature;
   a laser drive circuit which modulates the drive power source of the laser at a specified amplitude centered around a specified temperature and a specified current value;
   a means of stabilizing the wavelength by which the central wavelength of the laser beam generated by the laser is stabilized at a specific position on a special gas absorption line;
   a beam detection apparatus (6) which detects the intensity of the laser beam after the laser beam passes through the measuring object gas atmosphere; and
   a measuring means which performs a quantitative measurement of a specific gas based on the output of the beam detection apparatus.

摘要翻译： 公开了一种气体检测装置，包括：激光器，其产生波长和对应于驱动电流和温度的强度的激光束; 激光驱动电路，其以指定的温度和规定的电流值为中心的规定的振幅调制激光的驱动电源; 稳定由激光产生的激光束的中心波长稳定在特殊气体吸收线上的特定位置的波长的装置; 光束检测装置，其在激光束通过测量对象气体气氛之后检测激光束的强度; 以及基于光束检测装置的输出执行特定气体的定量测量的测量装置。