A detailed analysis of the behavior of a DFB fiber laser based on a high-speed tunable intra-cavity phase-shifter is presented. The phase-shifter made of a specially designed shape memory alloy is inducing a birefringence, thus allowing the laser to operate on either x or y polarization mode in the CW regime or in the Q-switched regime. The spectral characteristics of the laser are analyzed in detail for both regimes and the cavity properties are derived from the relaxation oscillation frequency.
© 2011 IEEE
Alex Fraser, Réal Vallée, Jean-Daniel Deschênes, Martin Bernier, Jérôme Genest, and Éric Weynant, "Q-Switched DFB Fiber Laser Based on a Shape Memory Alloy Optical Fiber Phase Modulator," J. Lightwave Technol. 29, 2156-2165 (2011)