可调谐双波长掺Yb3+光纤激光器的实验研究

tunable dual-wavelength fiber laser based on nonlinear polarization rotation technique is studied. A Polarization controller is used to adjust the tunable laser dual-wavelength output, which covers the spectral range of 1026 nm-1065 nm, and comprises of two parts: the equal-amplitude output and the unequal-amplitude output. Moreover, a reasonable explanation is made about the output power and tuning characteristics of the laser in combination with the experimental results. Experiments show that the relative dual-wavelength output power is determined by Yb fiber laser gain curve and the filtering mechanism, experimental results also show that the changes in pump power have obvious influence on the filtering properties of the laser, which is mainly due to fiber self-phase modulation (SPM) and cross-phase modulation (XPM) change with the pump power, which in turn affect the polarization evolution of the signal light.