Transverse Mode Controlled Wide-Single-Stripe Lasers By Loading Modal Filters

K. Ikeda; K. Shigihara; T. Aoyagi; S. Hinata; Y. Nagai; N. Kaneno; Y. Mihashi; Y. Seiwa; W. Susaki

doi:10.1117/12.976357

22 June 1989 Transverse Mode Controlled Wide-Single-Stripe Lasers By Loading Modal Filters

K. Ikeda, K. Shigihara, T. Aoyagi, S. Hinata, Y. Nagai, N. Kaneno, Y. Mihashi, Y. Seiwa, W. Susaki

Proceedings Volume 1043, Laser Diode Technology and Applications; (1989) https://doi.org/10.1117/12.976357
Event: OE/LASE '89, 1989, Los Angeles, CA, United States

Abstract

Two kinds of modal filter for high power diode lasers with a wide stripe have been examined. The first one is a partially narrow region formed in the active region. Flared-SBA(self-aligned bent active layer) laser in which the active layer flares the width from the narrow filter region to the wide output facet oscillates in a fundamental transverse mode under cw condition up to the output power of 64mW. The second one is a partial coating at the output facet of lasers. By applying it to an SBA laser whose stripe width is 150 μm, the laser oscillates in a single lobed far-field pattern up to 300mW, whose divergent angle is as narrow as 1.7° in FAHM(full angle at half maximum) under cw conditions.

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K. Ikeda, K. Shigihara, T. Aoyagi, S. Hinata, Y. Nagai, N. Kaneno, Y. Mihashi, Y. Seiwa, and W. Susaki "Transverse Mode Controlled Wide-Single-Stripe Lasers By Loading Modal Filters", Proc. SPIE 1043, Laser Diode Technology and Applications, (22 June 1989); https://doi.org/10.1117/12.976357

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