Electrically tunable lasers made from electro-optically active photonics band gap materials
Authors:
- 5 September 2005
- journal article
- Published by Optica Publishing Group in Optics Express
- Vol. 13 (18) , 7243-7249
Abstract
External cavity-free and electrically tunable laser made from photonics band gap (PBG) materials with electrically tunable stop band is reported. The tunable PBG materials are developed from a family of novel cholesteric liquid crystals (CLC) with electrically variable pitch that adopts a non-constant distribution in space across the CLC film. The CLC exhibits a distributed feedback cavity whose resonant frequency can be electrically varied over a spectral range wider than 300 nm. Under an optical pumping and subject to a variable electric field, a tunable laser has been demonstrated in experiment that shows a wavelength tuning over 33 nm.Keywords
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