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Vertical-Cavity Surface-Emitting Lasers with coupled cavities and with liquid crystal overlay

Publication date 2011
B-Phot Authors Krassimir Panajotov, Hugo Thienpont
Citation
K. Panajotov, V. Nair, Zujewski, M., and H. Thienpont, “Vertical-Cavity Surface-Emitting Lasers with coupled cavities and with liquid crystal overlay,” in 13th International Conference on transparent optical networks (ICTON), 2011.
Abstract We perform a theoretical linear study of the spectral and polarization threshold characteristics of coupled-cavity Vertical-Surface-Emitting Lasers (CC-VCSEL) and VCSELs with with Liquid Crystal overlay (LC-VCSEL). We show that strong wavelength discrimination can be achieved in CC-VCSELs by slightly detuning the cavities. We also consider the case of reverse-biasing one of the cavities, i.e. using it as a modulator via linear and/or quadratic electrooptic effect. Such a CC-VCSEL can act as a voltage-controlled polarization or wavelength switching device that is decoupled from the laser design. LC-VCSELs provide the possibility of selecting between two orthogonal directions of linear polarization (LP) of the fundamental mode (x or y LP) by electro-optically tuning the LC director. Finally, we numerically demonstrate that LC-VCSEL would be capable of efficient wavelength tuning.
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