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Proceedings Paper

Fourier optical transverse mode selection in broad-area lasers: experiment and simulation
Author(s): Sandra Wolff; Andrey Yu. Rodionov; Vladimir E. Sherstobitov; Henning Fouckhardt
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Paper Abstract

Broad area lasers (BALs) with external Fourier-optical cavities with spatial filter for transverse mode selection are investigated experimentally and numerically. Nearfield and farfield distributions are calculated and compared to experimental results. Two different BALs, one with a high (10%) and the other with a very low residual reflectivity of the output facet (facing the external resonator) are operated in external Fourier-optical 4f setups. For the BAL mentioned first, transverse mode selection is obtained at low pump currents; the emission of the fundamental or a specific higher order transverse mode can be stabilized. In the latter BAL transverse modes can be selectively excited up to pump currents more than 200% above laser threshold. Numerical calculations reveal, that if this BAL within an external 4f-cavity is pumped even higher above laser threshold, it starts to operate in a self-Q-switched mode. Pulse duration and repetition rates are in the range of 2-4ns and 100-200MHz, respectively. Also, the concept and technology for fabrication of compact, miniaturized hybrid integrated Fourier-optical external cavities based on polymer waveguide mirrors is described. Experimental results of transverse mode selection in BALs with hybrid integrated-optical cavities are presented.

Paper Details

Date Published: 17 February 2003
PDF: 12 pages
Proc. SPIE 4833, Applications of Photonic Technology 5, (17 February 2003); doi: 10.1117/12.474844
Show Author Affiliations
Sandra Wolff, Univ. of Kaiserslautern (Germany)
Andrey Yu. Rodionov, Research Institute for Laser Physics (Russia)
Vladimir E. Sherstobitov, Research Institute for Laser Physics (Russia)
Henning Fouckhardt, Univ. of Kaiserslautern (Germany)


Published in SPIE Proceedings Vol. 4833:
Applications of Photonic Technology 5

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