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Appl Opt. 2004 Jun 10;43(17):3504-12.

Analysis of the diffractional properties of dual-period apodizing gratings: theoretical and experimental results.

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  • 1Equipe Laser et Optique Guidée, Département de Physique, de Génie Physique et d'Optique, Centre d'Optique, Photonique et Laser, Université Laval, Québec G1K 7P4, Canada.


We present an analysis of the diffractional properties of dual-period apodizing gratings. In a previous paper we used these components to obtain single-lateral-mode and dual-longitudinal-mode emission from a broad-area diode laser. We now calculate the diffracted field for a monochromatic beam incident on the grating by using an analytical model. Predictions of the model are compared with experimental measurements made with several dual-period gratings. We also discuss the situation in which a dual-period grating is used as an external coupler of a diode laser in a two-wavelength emission regime.

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