22 April 2016 The control of CO2 lasing temporal charasteristics by modulated self-injected irradiation
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Abstract
We suggest using modulated self-injected radiation to achieve lasing regimes similar to Q-switching in a CO2 laser without loss of average output power. The feasibility of this solution is verified both theoretically and experimentally. Our theoretical model of CO2 laser is based on a standard six-temperature model supplemented with terms accounting for self-injection of laser output radiation. We show that temporal modulation of self-injected radiation with power several percent that of the laser output power in external optical systems achieves pulsed-periodical generation regime. The model is experimentally verified using a commercial CO2 laser. With modulation less than 5% of the output power pulsed-periodical lasing was realized. Pulse duration obtained was 300 ns with repetition rate of 20 kHz and power maximum-to-average rate around 20.
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V. V. Kiyko, V. V. Kiyko, D. A. Mikhaylov, D. A. Mikhaylov, "The control of CO2 lasing temporal charasteristics by modulated self-injected irradiation", Proc. SPIE 9729, High Energy/Average Power Lasers and Intense Beam Applications IX, 97290N (22 April 2016); doi: 10.1117/12.2214485; https://doi.org/10.1117/12.2214485
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