波分复用薄膜带通滤光片的中心波长温度稳定性  

Temperature Stability of the Central Wavelength for WDM Thin Film Bandpass Filters

作　　者：顾培夫[1] 陈海星[1] 陆巍[1] 白胜元[1] 李海峰[1] 章岳光[1] 刘旭[1] 唐晋发[1] 

机构地区：[1]浙江大学现代光学仪器国家重点实验室,杭州310027

出　　处：《光学学报》2004年第1期33-36,共4页Acta Optica Sinica

基　　金：高等学校重点实验室资助课题

摘　　要：讨论了影响波分复用薄膜滤光片中心波长漂移的因素 ,着重分析了滤光片的温度稳定性。根据实验结果 ,借助于高桥模型 ,分析计算了滤光片的折射率温度系数、线膨胀系数和泊松比以及它们对温度漂移的影响。得到了Ta2 O5/SiO2 滤光片薄膜的折射率温度系数、线膨胀系数、泊松比分别为 1× 10 -5℃-1,5× 10 -7℃-1和 0 12 ,指出了这三个参量是影响温度稳定性最重要的因素 ,特别是薄膜的折射率温度系数。对特定的基板热膨胀系数 ,通过调节滤光片的干涉级次和间隔层材料 ,可望得到零温度漂移的稳定滤光片。The factors influenced central wavelength shift of wavelength division multiplexing (WDM) narrow-band filters are discussed. The temperature stability for such filters is emphasized. Based on Takashashi model,the effect of the temperature coefficient of refractive index,coefficient of linear expansion and Poisson ratio on temperature stability of the central wavelength of the filters is analyzed and calculated by using authors′ software. The temperature coefficient of refractive index,linear expansion coefficient and Poisson ratio of the Ta_2O_5/SiO_2 narrow-band filters are 1×10 -5 ℃ -1 ,5×10 -7 ℃ -1 and 0.12 respectively. These three parameters are most important factors for the temperature stability of the filters,especially for the temperature coefficient of refractive index. For given substrate with certain linear expansion coefficient,the filter with a nearly zero wavelength shift is expected by means of adjusting interference order,cavity number and spacer material of the filters.

关 键 词：光纤通信技术 波分复用 薄膜带通滤光片 温度系数 折射率 线膨胀系数 泊松比 温度漂移 

分 类 号：TN713.5[电子电信—电路与系统] TN929.11