考虑晶体应力情况下的单块非平面环形腔分析

Analysis of Monolithic Nonplanar Ring Oscillators by Considering the Stress-Induced Birefringence

简要分析了单块非平面环形腔单频激光器的基本原理 ,并采用琼斯矩阵计算了单块单向行波非平面环形腔内的本征偏振态。深入分析了磁场强度、输出面偏振反射系数、入射角、非平面角及腔内其它参量对各本征偏振态的损耗及两本征偏振态间损耗差的影响 ,并且指出如何选择各参量以降低本征偏振态的损耗且增大两本征偏振态间的损耗差。最后还通过计算晶体应力在两个本征偏振态方向引起的相位差 ,讨论了应力作用方向以及应力双折射系数对腔内本征偏振态的损耗和两本征偏振态间损耗差的影响。

The principle of monolithic nonplanar ring single-frequency laser was introduced, and eigenpolarization states of monolithic unidirectional traveling wave nonplanar ring oscillator (NPRO) were calculated by Jones matrix. The influences of magnetic field strength, reflection coefficients of the output coupler, incident angle, nonplanar angle and other parameters inside cavity on the loss and loss difference of eigenpolarizations were analyzed. How to choose the parameters of cavity to decrease the loss of eigenpolarization states and increase the loss difference between two eigenpolarization states was pointed out. The influences of the stress direction and the stress-induced birefringence coefficient on the loss and loss difference of the eigenpolarization states in the cavity were discussed by calculating the phase difference between two eigenpolarization states induced by stress birefringence.