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Role of the pumping beam's shape in microchip lasers

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1 Author(s)
Chen, Y.F. ; Dept. of Electrophys., Nat. Chiao Tung Univ., Hsinchu, Taiwan

A technique for the generation of the cylindrical symmetry Laguerre-Gaussian fields TEM*p,l with p = 0 and specified values of l in a fiber-coupled diode end-pumped solid-state laser is reported. The key novelty is to produce a doughnut-shaped pump-profile by defocusing a standard fiber-coupled diode. The experimental results demonstrate that the stable transverse-mode pattern near the pump threshold is usually a LG TEM0,l mode with the distribution cos2 lθ (or sin2 lθ ) in azimuthal angle, having 2l nodes in azimuth.

Published in:

Quantum Electronics Conference, 2003. EQEC '03. European

Date of Conference:

22-27 June 2003

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