Polarization selection in external-cavity birefringent vertical-cavity surface-emitting lasers

Angel Valle; Luis Pesquera; Jaume Dellunde; Keith Alan Shore

doi:10.1117/12.305458

20 April 1998 Polarization selection in external-cavity birefringent vertical-cavity surface-emitting lasers

Angel Valle, Luis Pesquera, Jaume Dellunde, Keith Alan Shore

Proceedings Volume 3286, Vertical-Cavity Surface-Emitting Lasers II; (1998) https://doi.org/10.1117/12.305458
Event: Optoelectronics and High-Power Lasers and Applications, 1998, San Jose, CA, United States

Abstract

Calculations are reported of the effect of weak optical feedback on the polarization properties of birefringent vertical-cavity surface emitting lasers (VCSELs) in an external cavity configuration. Attention is focused on the competition between two orthogonal polarization of the fundamental transverse mode of the weakly index VCSEL. Ohmic heating effects on polarization selection and sensitivity of external cavity VCSELs are analyzed. We show that control of the emission polarization selection and sensitivity of external cavity VCSELs are analyzed. We show that control of the emission polarization can be exercised even for very small external reflectivities by appropriate choice of optical feedback delays. The range of currents in which a particular polarization is selected narrows as thermal effects become important. A controlled displacement of the external reflector with respect to the laser can maintain the polarization over a wide current range in the presence of thermal effects. The polarization selectivity is shown to be dependent upon the strength of optical feedback. Polarization is also shown to be highly sensitive to small changes in optical feedback delay and to very small unwanted reflections.

Citation Download Citation

Angel Valle, Luis Pesquera, Jaume Dellunde, and Keith Alan Shore "Polarization selection in external-cavity birefringent vertical-cavity surface-emitting lasers", Proc. SPIE 3286, Vertical-Cavity Surface-Emitting Lasers II, (20 April 1998); https://doi.org/10.1117/12.305458

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