一种可连续调谐空间光学衰减器的研究  

Research on a continuously tunable space optical attenuator

作　　者：徐圣奇[1] 辛玉军[1] 韩文杰[1] 王治中[1] 张文平[1] 邬双阳[1] 董光焰[1] 李卫森[1] 

机构地区：[1]中国电子科技集团公司第二十七研究所,河南郑州450007

出　　处：《红外与激光工程》2015年第2期673-676,共4页Infrared and Laser Engineering

基　　金：国家863计划(2009AA7010402)

摘　　要：可调谐空间光学衰减器在各类光电系统中具有广泛的应用前景。基于法布里-珀罗多光束干涉原理,创新性地设计了一种适用于相干光束的可调谐空间光学衰减器,该衰减器选取在红外波段具有较高折射率的硒化锌晶体作为材料,结合温度控制系统,实现光功率的调谐。采用Nd:YAG激光器作为光源,对该衰减器的性能进行测量,其调谐范围可以达到3 d B。理论分析表明,相对于热膨胀系数,硒化锌材料的热光系数是决定衰减器性能的关键参量。此外,通过在硒化锌光学平板前后表面镀高反膜,可进一步提高调谐范围。Continuously tunable space optical attenuator has a wide prospect in various optoelectronic equipments. Based on the principle of Fabry-Perot interferometer, a new space optical attenuator was presented, its key component is a Zn Se crystal sheet, combined with a high accurate temperature control system, the attenuation ratio of laser beam can be tuned. The attenuation performance was measured with a Nd：YAG laser as light source. The experimental results indicate that the tuning range of the attenuator can reach 3 d B. Theoretical analysis shows that compared with thermal expansion coefficient, thermo-optic coefficient of Zn Se material plays a key role in determining the attenuator performance. In addition, by coating highly reflective dielectric film on both sides of Zn Se sheet, the tuning range can be further increased.

关 键 词：光学衰减 连续调谐 法布里-珀罗干涉 热光系数 

分 类 号：O439[机械工程—光学工程]