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A compact wide-aperture single-mode TE-CO2laser with a low chirp rate

By: Parent, A.; Lavigne, P.; McCarthy, N.; Pascale, D.;

1986 / IEEE

Description

This item was taken from the IEEE Periodical ' A compact wide-aperture single-mode TE-CO2laser with a low chirp rate ' Single mode operation of a TE-CO2laser was obtained using a2 \times 2 \times 30cm gain module in a Cassegrain resonator with a Gaussian reflectivity convex mirror to produce a fundamental mode of large cross sectional area, and reducing the pressure to 375 torr in a 50 cm long cavity to limit the oscillation to a single longitudinal mode. The 70 ns gain switched pulse (FWHM) had an energy of 175 mJ, a peak power of 2.0 MW, a diffraction limited far-field, and a frequency chirp rate lower than 60 kHz/�s2.