High-power Q-switched CO2 laser based on a fast axial gas flow system

Naoya Hamada; Tatsuhiko Sakai

doi:10.1117/12.144675

4 May 1993 High-power Q-switched CO2 laser based on a fast axial gas flow system

Naoya Hamada, Tatsuhiko Sakai

Proceedings Volume 1810, 9th International Symposium on Gas Flow and Chemical Lasers; (1993) https://doi.org/10.1117/12.144675
Event: Ninth International Symposium on Gas Flow and Chemical Lasers, 1992, Heraklion, Greece

Abstract

Performance characteristics of a high power Q-switched CO₂ laser based on a fast gas flow system have been investigated. A combination of a fast rotating chopper and an intracavity telescope as a Q-switching device has been applied to a fast axial flow, dc- discharged 1.5 kW continuous wave CO₂ laser. The laser delivered 480 W average output power at 12 kHz pulse repetition rate on a free-running basis. Peak power of each Q-switched pulse is approximately 100 kW, and the pulse duration is 250 nsec. An analytical model describing the unique characteristics of the CO₂ laser medium and of the rotating chopper Q-switching technique has been developed and applied to the experimental results. Good agreement was obtained between the theory and experiment for various pulse parameters such as peak power, pulse duration, and pulse buildup time. A method to improve the pulse characteristics using a fast axial gas flow system is proposed.

Citation Download Citation

Naoya Hamada and Tatsuhiko Sakai "High-power Q-switched CO2 laser based on a fast axial gas flow system", Proc. SPIE 1810, 9th International Symposium on Gas Flow and Chemical Lasers, (4 May 1993); https://doi.org/10.1117/12.144675

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