摘要
为了使法布里-珀罗标准具有较好的热稳定性,从而制作性能较好的梳状滤波器,可采用特别的晶体制作标准具.通过分析表明,温度对标准具的影响归因于材料的热膨胀和折射率的温度效应.如果晶体的热膨胀系数和折射率温度系数在1个或1个以上方向上的值符号相反,则光束在晶体中某些方向上的光程与温度无关.据此提出了用晶体材料制作具有热稳定性的法布里-珀罗标准具的方法,并以晶体-LiSAF为例,进行具体计算和说明.结果表明,用晶体可以设计出效果很好的具有温度稳定的法布里-珀罗标准具.
Fabry-Perot etalon must be thermally stable when it is used to make interleaver. The temperature sensitivity of the etalon is due to thermal expansion and the thermal effects on the index of refractive of the materials. For some crystals, one or more of the thermal expansion coefficients and thermal refractive index coefficients have an opposite sign to the other coefficients such that a direction of temperature insensitive optical path length exists. The thermally stable etalon devices can be made based on this athermalization technique. As an example, a detailed calculation and description are given for LiSAF crystal. By concrete calculation, it can be seen that a good effect for thermally stable etalon devices can be designed using crystal.
出处
《江南大学学报（自然科学版）》
CAS
2007年第4期438-441,共4页
Joural of Jiangnan University (Natural Science Edition)
关键词
法布里-珀罗标准具
梳状滤波器
热稳定性
热膨胀系数
折射率温度系数
Fabry- Perot etalon, interleaver
temperature insensitive
thermal expansion eoeffieient
thermal refractive index coefficient
