发明名称 |
Dual-wavelength laser apparatus. |
摘要 |
<p>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. </p> |
申请公布号 |
EP0196856(A2) |
申请公布日期 |
1986.10.08 |
申请号 |
EP19860302174 |
申请日期 |
1986.03.25 |
申请人 |
TOKYO GAS CO., LTD. |
发明人 |
UEHARA, KIYOJI;UEKI, TAKASHI;TANAKA, HIROAKI;TAI, HIDEO |
分类号 |
G01N21/39;H01S3/00;H01S3/08;H01S3/101;H01S3/105;H01S3/106;H01S3/139;H01S5/0683;H01S5/14;H01S5/40;(IPC1-7):H01S3/105 |
主分类号 |
G01N21/39 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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