25 February 2010 Tunable birefringent phase shift induced in fiber Bragg gratings by a shape memory alloy phase modulator
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Proceedings Volume 7598, Optical Components and Materials VII; 75980J (2010) https://doi.org/10.1117/12.842098
Event: SPIE OPTO, 2010, San Francisco, California, United States
Abstract
We propose a new method to induce low loss tunable birefringent phase shifts in fiber Bragg gratings (FBG) by applying mechanical stresses at precise locations along the FBG. A specially designed shape memory alloy (SMA) ferrule is used to transfer mechanical stress to the optical fiber. A piezoelectric actuator control the amount of stress delivered to the fiber by the SMA ferrule, thus allowing a precise and dynamic tuning of the amplitude of the phase shift induced in the FBG. A distributed feedback (DFB) fiber laser based on this phase modulator is also introduced.
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A. Fraser, M. Bernier, E. Weynant, R. Vallée, "Tunable birefringent phase shift induced in fiber Bragg gratings by a shape memory alloy phase modulator", Proc. SPIE 7598, Optical Components and Materials VII, 75980J (25 February 2010); doi: 10.1117/12.842098; https://doi.org/10.1117/12.842098
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