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6 October 2003 Single-mode waveguide gas laser
S. L. Pogorelsky; V. F. Lazukin; V. F. Maiboroda; A. M. Barmashov
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Proceedings Volume 5137, International Conference on Lasers, Applications, and Technologies 2002: Advanced Lasers and Systems; (2003) https://doi.org/10.1117/12.518088
Event: International Conference on Lasers, Applications, and Technologies 2002, 2002, Moscow, Russian Federation
Abstract
An effective mode selection method for square waveguides is proposed. One has to cut up the waveguide and turn the parts around optical axis. Nearly round fundamental mode is almost indifferent to such asymmetry while the mirror modes suffer great losses. The "turn" losses evaluation through the mode overlap integral confirms the method effectivenss. Lasing experiments were performed for an RF-pumped CO2 laser with a folded U-type resonator. To introduce asymmetry, waveguide channels were shifted so that the waveguide end fold mirrors image is turned axially. The laser beam quality was tested with "ModeMaster" coherent beam propagation analyzer. M2 value equal to one within the device tolerance is measured.
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S. L. Pogorelsky, V. F. Lazukin, V. F. Maiboroda, and A. M. Barmashov "Single-mode waveguide gas laser", Proc. SPIE 5137, International Conference on Lasers, Applications, and Technologies 2002: Advanced Lasers and Systems, (6 October 2003); https://doi.org/10.1117/12.518088
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