Measurements of spectrum on HF chemical lasers with MOPA configuration

Yu-bin Chen; Xing Chen; Wenguang Liu

doi:10.1117/12.971470

15 October 2012 Measurements of spectrum on HF chemical lasers with MOPA configuration

Yu-bin Chen, Xing Chen, Wenguang Liu

Proceedings Volume 8417, 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment; 84173V (2012) https://doi.org/10.1117/12.971470
Event: 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies (AOMATT 2012), 2012, Xiamen, China

Abstract

HF chemical laser with master oscillator power amplifier (MOPA) configuration is a good solution to achieve high output power with high reliability and good beam quality. Researches of spectrum on HF chemical lasers with MOPA configuration are important for both enhancing atmospheric transmission and ensuring high power extraction efficiency on multiple vibrational transitions. A HF chemical laser operated in the line-selected mode which makes the output frequencies located in the atmospheric transparency windows will allow low atmospheric absorption, which will reduce thermal blooming effects and increase the intensity on the target. This will make the CW HF chemical lasers a possible development for long-distance transmission within the atmosphere. In this paper, a HF chemical laser with MOPA configuration using two identical discharge-driven CW HF laser modules as the laser oscillator and amplifier is presented. A multiple-selected-line, confocal, unstable resonator is also introduced. Measurements of spectrum on the laser have been taken by varying the flow parameters of the discharge-driven HF laser. It is concluded from our experiments that, the spectrum keeps stable with fixed flow parameters, even though the relative power of different lines varies slightly, and the maximum power is on the direct cascade of P₂(7) and P₁(8) lines. It is also believed that control of the flow parameters may allow high J direct cascade levels transitions, which may ensure high power extraction efficiency from multiple vibrational transitions.

Citation Download Citation

Yu-bin Chen, Xing Chen, and Wenguang Liu "Measurements of spectrum on HF chemical lasers with MOPA configuration", Proc. SPIE 8417, 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 84173V (15 October 2012); https://doi.org/10.1117/12.971470

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KEYWORDS

Hydrogen fluoride lasers

Chemical lasers

Optical amplifiers

Oscillators

Continuous wave operation

High power lasers

Mirrors

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