Apodizing Holographic Gratings for Dual-Wavelength Operation of Broad-Area Semiconductor Lasers
Applied Optics, Vol. 37, Issue 36, pp. 8420-8425 (1998)
http://dx.doi.org/10.1364/AO.37.008420
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Abstract
Apodizing holographic gratings are designed to have a Gaussian reflectivity profile in the −1 order and a complementary reflectivity profile in the specular (0) order. They are obtained by the interference of two Gaussian beams on a glass plate covered with a photoresist. These gratings are intended to be used as the coupler of the external cavity of a broad-area semiconductor laser. When the grating is oriented to get the −1 order counterpropagating with respect to the incident beam, single-longitudinal- and single-lateral-mode operation is obtained. We report on the fabrication technique of an apodizing holographic grating designed to allow lasing on two wavelengths simultaneously, with a preselected wavelength separation. The results obtained with a commercial broad-area laser are presented.
© 1998 Optical Society of America
[Optical Society of America ]
OCIS Codes
(050.2770) Diffraction and gratings : Gratings
(090.2890) Holography : Holographic optical elements
(140.2020) Lasers and laser optics : Diode lasers
(140.3570) Lasers and laser optics : Lasers, single-mode
(140.5960) Lasers and laser optics : Semiconductor lasers
(220.1230) Optical design and fabrication : Apodization
Citation
Jean-François Lepage and Nathalie McCarthy, "Apodizing Holographic Gratings for Dual-Wavelength Operation of Broad-Area Semiconductor Lasers," Appl. Opt. 37, 8420-8425 (1998)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-37-36-8420
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