| Title |
Frequency and Power Stabilization of CO_2 Laser Using a Photoacoustic Effect |
| Authors |
최종운(Choi Jong-Woon) ; 유문종(Yu Moon-Jong) ; 최성웅(Choi Sung-Woong) ; 서호성(Seo Ho-Sung) |
| Keywords |
Potoacoustic Effect ; CO₂ Laser ; Frequency ; Power ; Stabilization |
| 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 %. |