Interference effects on the efficiency of an intracavity Raman-Nath mode locker in a TE CO2 laser

Richard S. Eng; Victor H. Hasson; Yu-Lin Wang; Hsian Pei Chou; Eddie H. Young

doi:10.1117/12.308077

12 May 1998 Interference effects on the efficiency of an intracavity Raman-Nath mode locker in a TE CO₂ laser

Richard S. Eng, Victor H. Hasson, Yu-Lin Wang, Hsian Pei Chou, Eddie H. Young

Proceedings Volume 3268, Gas and Chemical Lasers and Intense Beam Applications; (1998) https://doi.org/10.1117/12.308077
Event: Optoelectronics and High-Power Lasers and Applications, 1998, San Jose, CA, United States

Abstract

The axial separation distance between an intracavity resonant Raman-Nath acousto-optic modulator and the secondary mirror of an unstable resonator of a TE CO₂ laser has strong effects on the mode-locking efficiency. Experimental measurements showed that the mode-locker laser pulse width was a periodic function of the separation distance with a period of about 18 mm. Preliminary simple analyses using a two-beam interference model yield a periodic sine-squared acousto-optic diffraction intensity distribution as a function of separation distance with the mode-locked pulse width varying as the inverse of sine to the fourth power of the diffraction intensity. The observed pulse width was in good agreement with the calculated value using the above interference theory.

Citation Download Citation

Richard S. Eng, Victor H. Hasson, Yu-Lin Wang, Hsian Pei Chou, and Eddie H. Young "Interference effects on the efficiency of an intracavity Raman-Nath mode locker in a TE CO₂ laser", Proc. SPIE 3268, Gas and Chemical Lasers and Intense Beam Applications, (12 May 1998); https://doi.org/10.1117/12.308077

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