Tunable external cavity laser based on liquid crystal fabry-perot interferometer and liquid crystal phase shifter

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Abstract

An innovative non-mechanical and low power consumption continuous wavelength tunable external cavity laser (ECL) using liquid crystal tuning elements is demonstrated. The laser system consists of a gain chip, a collimating lens, tuning elements, and a partial reflection mirror. The tuning elements include a liquid crystal Fabry-Perot interferometer (LC-FPI) and a LC phase shifter. The LC-FPI fulfills the mode-hopping tuning and the continuous tuning is achieved by the LC phase shifter. A coarse wavelength tuning range of 40 nm and sidemode suppression of about 25 dB is obtained. © 2007 Taylor and Francis Group, LLC.

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Seah, L. K., Murukeshan, V. M., Wang, P., & Chao, Z. X. (2007). Tunable external cavity laser based on liquid crystal fabry-perot interferometer and liquid crystal phase shifter. International Journal of Optomechatronics, 1(1), 63–72. https://doi.org/10.1080/15599610701232622

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