Nonlinear optical phenomena and devices

Influence of the thermal self-interaction of radiation on the shift of the emission frequency of an electron-beam-controlled CO₂ laser

A. I. Sidorov, V. N. Chirkov, I. L. Yachnev

All-Russian Research Center "S. I. Vavilov State Optical Institute", St. Petersburg

Abstract: An experimental study established that the thermal self-interaction of radiation is the main mechanism responsible for the shift of the emission frequency of a hybrid atmospheric-pressure electron-beam-controlled CO₂ laser emitting pulses longer than 10 μs. It was found that the frequency shift can be reduced by weakening the self-interaction in an optimal working mixture. A dynamic deformation of the lasing mode was detected.

PACS: 42.55.Lt, 42.60.Mi

Received: 10.08.1993

 English version: Quantum Electronics, 1994, 24:6, 510–512

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