A linearity tunable fiber ring laser based on closed-loop PZT

Abstract

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 of the fiber ring laser is linear with the tuning range nearly 0.9nm. Furthermore, the wavelength fluctuations of the tunable fiber ring laser are kept within ±0.01nm, and the power variation is kept within ±0.3dB.