Abstract
The emission of a broad-area laser always contains several lateral modes (along the junction plane) even at low drive levels. To increase the discrimination against high-order lateral modes, we developed simple techniques for depositing a profiled thin layer of SiO on the output facet of a broad-area laser that has a 75-μm-wide injection current stripe. The profiled coating provided a nearly Gaussian reflectivity in the lateral direction (parallel to the junction plane). The resolved near-field spectra of the uncoated and coated lasers have been compared. The maximum output power in the single-lateral-mode regime was pushed to 25 mW with the profiled coating, compared with a corresponding power of less than 1 mW before deposition. Experimental results have confirmed the behavior predicted by our numerical simulations. This method is scalable to higher-power lasers.
© 1996 Optical Society of America
Full Article | PDF ArticleMore Like This
Sylvain Mailhot, Yves Champagne, and Nathalie McCarthy
Appl. Opt. 39(36) 6806-6813 (2000)
Aviv Keshet, Peter Eugster, Paul Bloudoff, Bruce G. Klappauf, and KirkW. Madison
Opt. Express 15(19) 12344-12355 (2007)
Brian K. Garside and Paul Kempf
Appl. Opt. 25(21) 3846-3849 (1986)