High-quality beam transversal gas transport cw CO2 laser

Iulian Gutu; Victor Rares Medianu; Petre Cristian

doi:10.1117/12.312714

2 July 1998 High-quality beam transversal gas transport cw CO₂ laser

Iulian Gutu, Victor Rares Medianu, Petre Cristian

Proceedings Volume 3405, ROMOPTO '97: Fifth Conference on Optics; (1998) https://doi.org/10.1117/12.312714
Event: ROMOPTO '97: Fifth Conference on Optics, 1997, Bucharest, Romania

Abstract

A new optical resonator configuration for transverse flow CO₂ laser was developed. A high value of the matching coefficient (the cross section of the laser beam/the cross section of the electrical discharge)-(eta) _m, is obtained for laser beams with TEM_00/01 intensity distribution (that corresponds to the low values of the Fresnel number-N_F of the optical resonator). Simultaneously, both types of the gain and refractive index asymmetries of the active medium (parallel and perpendicular on the flow direction) are compensated. A 90 degree(s) deflection device is the main constructive element (this is built by two mirrors at 45 degree(s) relative angle and offers the pentaprism properties). This deflection device reverses the wavefront in one of the two discharge channel and in addition improved the resonator stability. The main results are (eta) _m is congruent to 0.83 for N_F is congruent to 1.9 and the beam pattern is independent of the power level in the range of 300 W to 1800 W.

Citation Download Citation

Iulian Gutu, Victor Rares Medianu, and Petre Cristian "High-quality beam transversal gas transport cw CO₂ laser", Proc. SPIE 3405, ROMOPTO '97: Fifth Conference on Optics, (2 July 1998); https://doi.org/10.1117/12.312714

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