对称棱镜式环形谐振腔结构优化（英文）  

Structural optimization of ring resonant cavity consisted with symmetry prisms

作　　者：姚呈康[1] 李俊[1] 李龙[1] 

机构地区：[1]中航工业西安飞行自动控制研究所,陕西西安710075

出　　处：《红外与激光工程》2016年第11期216-224,共9页Infrared and Laser Engineering

摘　　要：由直角梯形棱镜构成的环形谐振腔的输出信号在机械振动环境下会受到影响,使输出波形幅值产生调制。为了改善谐振腔输出信号质量,从工程探索的角度出发,首次将对称型全反射棱镜纳入谐振腔的结构设计方案中。通过理论计算和有限元分析的方法,对比了两种谐振腔的光线传输特性和应力分布。结果表明,对于传输波长为632.8 nm的激光谐振腔而言,对称型结构可以保证构成谐振腔的光学元件具有对称的应力分布,降低棱镜上的应力双折射效应,提高输出信号的稳定性。对称性棱镜环形谐振腔的激光传输轨迹更稳定,装配要求更宽松,应力极值仅为非对称结构的15%。通过对比,在一个激励周期内,对称型谐振腔的激光输出能量波动相比原始结构降低了52.63%,平稳性获得了显著的改善。使用对称型环形谐振腔,对于提高我国现阶段环形激光传感器件的输出稳定性提供了一种新的技术途径。The amplitude of the output voltage signal of ring resonator which consisted of right trapezoid prisms would be modulated in the mechanical vibration. From the perspective of engineering exploration, a new symmetry structure compacted with symmetry prisms to improve the ring resonator performance was put forward and discussed in the first time. The propagation property of the laser beam and the stress distribution in prisms of those two kinds of resonators was analyzed by theoretical computation and finite element analysis method. Results show that, as for the laser resonator that wavelength is 632.8 nm, the symmetry structure has a symmetry stress distribution, and the value is much lower than that in asymmetry one in prism by 15%. Compared with the asymmetry cavity＇s output energy, the deviation extent of the symmetry one decreased more than 52.63% in one excitation period. From the results of simulation, using the symmetry resonator structure could reduce the stress induced birefringence in prism and off-axis range of the laser beam trajectory in the cavity, and improve the stability of output laser intensity and output signal quality effectively. The symmetry structure provides a new way for optimization design and reduction amplitude modulation for the ring resonator.

关 键 词：环形谐振腔 光强调制 应力双折射 

分 类 号：TN252[电子电信—物理电子学] V241.558[航空宇航科学与技术—飞行器设计]