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Proceedings Paper

Generation of single transverse modes in a commercial multimode VCSEL by the beam-profile adapted optical feedback
Author(s): Yu-Heng Wu; Chuan-Pi Hsu; Da-Long Cheng; Wang-Chuang Kuo; Tsu-Chiang Yen
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Paper Abstract

This research investigated the feasibility of applying beam-profile adapted optical feedback to generate single high-order transverse modes in a commercial multi-transverse mode vertical-cavity surface-emitting laser (VCSEL). The beam-profile adaption was achieved by launching the multi-transverse-mode beam profile of the solitary VCSEL into a single-mode fiber. At the fiber's exit, a quasi-Gaussian beam profile was easily obtained. Afterward, the beam was passed through a spatial light modulator (SLM), and was then fed back into the laser's cavity. The SLM was designed to have the intensity pattern of a designated transverse mode. Accordingly, the beam profile of the feedback beam was adapted to be the pattern of a single transverse mode. Conducting by the feedback beam, the VCSEL would lase the designated single transverse mode with a side-mode suppression ratio about 10 dB. More experimental details will be presented. These results will help to expand the application of VCSELs.

Paper Details

Date Published: 27 April 2010
PDF: 8 pages
Proc. SPIE 7720, Semiconductor Lasers and Laser Dynamics IV, 77201S (27 April 2010); doi: 10.1117/12.853964
Show Author Affiliations
Yu-Heng Wu, National Sun Yat-Sen Univ. (Taiwan)
Chuan-Pi Hsu, National Sun Yat-Sen Univ. (Taiwan)
Da-Long Cheng, SHU-TE Univ. (Taiwan)
Wang-Chuang Kuo, National Sun Yat-Sen Univ. (Taiwan)
Tsu-Chiang Yen, National Sun Yat-Sen Univ. (Taiwan)

Published in SPIE Proceedings Vol. 7720:
Semiconductor Lasers and Laser Dynamics IV
Krassimir Panajotov; Marc Sciamanna; Angel A. Valle; Rainer Michalzik, Editor(s)

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