超稳球形光学腔的设计

DESIGN OF THE ULTRA STABILE SPHERICAL OPTICAL CAVITY

环境振动会引起光学谐振腔体的形变,从而降低了光学谐振腔的稳定性能.为了减小环境振动对光学谐振腔稳定性的影响,采用了有限元数值模拟的方法,设计了对振动不敏感的球形光学超稳腔.通过数值模拟水平支撑的球形腔,改变腔体的支撑位置,得到了球形腔光程变化量随位置参数变化的关系曲线.结果表明,通过选择合适的支撑位置,能够保持两腔镜平行,使得光程的变化最小,可以有效地减小环境振动对球形腔稳定性的影响.该方法对超稳球形腔的设计具有重要的指导意义.

Environmental vibration can the stability performance of the optical cause the deformation of optical cavity, and degrade cavity. In order to reduce the effect of environmental vibration on stability of optical cavity, an ultra stable spherical optical cavity, which is insen- sitive to environmental vibration insensitive to environmental vibration, is designed with the method of finite element numerical simulation. We get the relation curve between the optical path variation of spherical cavity and the location parameters by means of numerical simulation on the spherical cavity supported in the horizontal plane with changes of the supporting posi- tion. It turns out that this way can effectively reduce the effect of environmental vibration on stability of spherical cavity by selecting the optimized supporting position, which keeps the cavity reflectors parallel and minimizes the change of optical path. The method is important to the design of ultra stable spherical cavity.