Pulsed CO2 laser oscillator excited by microwaves

Toshi Sugiyama; M. Kimura; Shigeki Yamane; T. Yano; R. Sano

doi:10.1117/12.334415

22 December 1998 Pulsed CO₂ laser oscillator excited by microwaves

Toshi Sugiyama, M. Kimura, Shigeki Yamane, T. Yano, R. Sano

Proceedings Volume 3574, XII International Symposium on Gas Flow and Chemical Lasers and High-Power Laser Conference; (1998) https://doi.org/10.1117/12.334415
Event: Twelfth International Symposium on Gas Flow and Chemical Lasers and High-Power Laser Conference, 1998, St. Petersburg, Russian Federation

Abstract

The optimum excitation conditions for pulsed CO₂ laser oscillation excited by microwaves are investigated to achieve oscillation with a short pulse width at a high repetition rate. The excitation conditions are optimized as follows; (1) by evaluating the decay time of excited N₂ molecule population density to optimize the gas mixture, and (2) by evaluating the discharge stability and the laser output waveform to optimize the magnetron drive conditions. We have developed a new coaxial fast gas flow pulsed CO₂ laser oscillator excited by microwaves, which produces pulses output with a rise time of less than 5 microsecond(s) ec rise-time and a 1/e- fall time of 30 microsecond(s) ec at a maximum repetition rate of 5 kHz. It is also possible to modulate the output power and the pulse waveform at high speed. The oscillator is currently being tested for application to a laser drilling system for printed wired boards.

Citation Download Citation

Toshi Sugiyama, M. Kimura, Shigeki Yamane, T. Yano, and R. Sano "Pulsed CO₂ laser oscillator excited by microwaves", Proc. SPIE 3574, XII International Symposium on Gas Flow and Chemical Lasers and High-Power Laser Conference, (22 December 1998); https://doi.org/10.1117/12.334415

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