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A linearity tunable fiber ring laser based on closed-loop piezoelectric ceramics (PZT) is proposed and successfully demonstrated. The fiber Bragg grating (FBG) of the ring cavity is fixed on the PZT, and the strain gauge attached on the PZT is monitoring the error, the PZT driving system is compensating the nonlinear hysteresis of the PZT real-timely. Experimental results show that the tuning curve...
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