无磁光学非互易实验教学与设计

作为一种有趣的非线性光学效应,四波混频在众多领域有重要的应用。本文利用四波混频效应实现无磁的光学非互易,分别研究了信号光失谐量、泵浦光光功率和气体池温度等参量对信号光正向和反向传播时透过率的影响。实验结果表明改变这些参量可有效地调控正向透过率,而极低的反向透过率几乎不受影响。该文对于大学物理实验教学具有一定的参考价值。     

Single-frequency,single-polarization ytterbium-doped fiber laser by self-injection locking

We demonstrated a stable single-frequency,single-polarization operation of ytterbium-doped fiber laser. As a novel practical method to realize single-polarization operation of fiber distributed Bragg reflector (DBR) laser,we proposed self-injection locking (SIL) with an active fiber ring feedback cavity.The laser has high output power exceeding 15 mW,wavelength of 1053.20 nm,and side-mode suppression ratio greater than 60 dB. The SIL fiber laser shows the improvements in output power and side-mode suppression compared with the fiber DBR laser.No mode-hopping is observed within 2 hours.