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Self-stabilized Nonlinear Lateral Modes of Broad Area Lasers

Mehuys, David and Lang, Robert J. and Mittelstein, Michael and Salzman, Joseph and Yariv, Amnon (1987) Self-stabilized Nonlinear Lateral Modes of Broad Area Lasers. IEEE Journal of Quantum Electronics, QE-23 (11). pp. 1909-1920. ISSN 0018-9197.

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The lateral modes of broad area lasers are investigated theoretically. The nonlinear interaction between optical field and effective refractive index leads to a saturable nonlinearity in the governing field equation, so that self-modulated solutions are found to be stable with increased current injection above saturation intensity. We derive approximate analytical solutions for traveling wave fields within the broad area laser. The field amplitude consists of a small ripple superimposed on a large dc value. Matching fields at the boundary determines the modulation depth and imparts an overall phase curvature to the traveling wave mode. There are multiple lateral modes for a given set of operating conditions, and modes with successively more lobes in the ripple have greater overall phase curvature. In contrast to the linear problem, several lateral modes can achieve the same modal gain, for a given injected current density, by saturating the gain to different extent. Thus, these modes would exhibit slightly different optical powers.

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Additional Information:“©1987 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.” Manuscript received February 23, 1987; revised June 11, 1987. The research described in this work was conducted in the Department of Applied Physics, California Institute of Technology, and was supported in part by the Office of Naval Research and by the National Science Foundation.
Issue or Number:11
Record Number:CaltechAUTHORS:MEHieeejqe87
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Deposited On:22 Jun 2005
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