High-Stability multi-wavelength photonic crystal fiber laser based on nonlinear polarization rotation temperature measurement

Abstract

We have proposed and experimentally demonstrated a multi-wavelength fiber laser with high-stability. The physical model and theoretical mechanism of nonlinear polarization rotation was theoretical analyzed. Here, we have developed a novel method with optimizing design for improving the laser stability for the multi-wavelength output based on Erbium doped photonic crystal fiber. By the experiments description, the output spectra of multi-wavelength was from 1558.34 nm to 1562.00 nm with 0.92 nm intervals, and the fluctuation of peak power was found to be less than 1 dB under 100 min operation scan at 20 ℃. More than that, the full temperature stability of the multi-wavelength outputs was tested with a pump power of a 980 nm LD of 278 mW and the temperature range of 25 ℃− 45 ℃, where the power fluctuation of 1559.64 nm, 1560.56 nm and 1561.48 nm laser outputs was less than 2.66 dB, 1.7 dB and 2.81 dB, respectively.