optical length

Based on the inhomogeneous heat distribution, the thermal birefringence and thermal depolarization have been studied in a tube YAG laser. The optical length differences of thermal birefringence and the losses of thermal depolarization have been calculated under different thicknesses of the laser tube and different pump powers.

对非均匀发热的管状YAG激光器的热应力双折射和热致退偏进行了深入研究，计算模拟了不同管壁厚度和泵浦功率下的热致双折射光程差和热致退偏损耗。

The high-resolution absorption spectra of real and simulated atmosphere were recorded by using an experimental system, which includes a tunable pulsed OPO, an 8 m base-length white cell with optical length of 1 km, and a time-division multiplexing detector system.

用脉冲可调谐光参量振荡器作光源，使用光程长达1km的8m长吸收池，采用分时复用的单探测器探测方法，组成测量系统，测量了一系列高分辨率的模拟和实际大气的吸收光谱。