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Frequency and Power Stabilization of $CO_2$ Laser Using a Photoacoustic Effect  

Choi Jong-Woon (호남대 공대 정보통신공학과)
Yu Moon-Jong (호남대 공대 정보통신공학과)
Choi Sung-Woong (전자통신연구원 디지털 방송연구단)
Seo Ho-Sung (한국표준과학연구원)
Publication Information
The Transactions of the Korean Institute of Electrical Engineers C / v.53, no.11, 2004 , pp. 583-588 More about this Journal
Abstract
We stabilized the frequency and power of a high voltage excited CW CO2 laser on the peak of the Doppler broadened gain curve using the photoacoustic effect generated from the laser itself. The photoacoustic signal is directly coupled from an radio frequency discharge chamber via a capacitor microphone into a detector and a lock-in stabilizer. The frequency stability is estimated to be better then 1.2×10/sup -7/ at the transition P(20) line. The stabilized output power variation was reduced to from 77 % to 3.3 %.
Keywords
Potoacoustic Effect; CO₂ Laser; Frequency; Power; Stabilization;
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