楔块调整式Talbot干涉仪的光学设计  

Optical design for wedge-adjusted Talbot interferometer

作　　者：李川[1] 张以谟[2] 田学飞[2] 刘铁根[2] 吴晟[1] 

机构地区：[1]昆明理工大学信息工程和自动化学院,云南昆明650051 [2]天津大学现代光学仪器研究所光电信息技术科学教育部重点实验室,天津300072

出　　处：《光学精密工程》2003年第5期453-456,共4页Optics and Precision Engineering

基　　金：国家自然科学基金(No.60077023);云南省自然科学基金(No.2002F0004R)资助项目

摘　　要：为改变光纤光栅的写入Bragg波长,研制了包括一块相位模板和两块紫外反射平面镜的楔块调整式Talbot干涉仪。在写入光纤Bragg光栅的过程中,通过调整两平面镜的反射角度可改变由±1级衍射光束经两平面镜反射后形成的干涉条纹的周期。最后,放置在可调谐干涉区的光纤就可刻写成具有不同写入Bragg波长的光纤光栅。值得注意的是通过选择不同倾斜角α的楔形块,决定了光纤光栅的写入Bragg波长的改变率和干涉条纹棱脊位置的位移率。A wedge-adjusted Talbot interferometer, which includes one phase mask and two UV-reflected mirrors, has been developed to change the process of writing fiber Bragg grating. The interference fringe period formed by the ±1 order diffractive beams is changed by adjusting the reflected angles of two mirrors, and the fiber placed in the tuned interference fringe can then be fabricated to the fiber Bragg grating with various inscribed Bragg wavelengths. The changing ratio of the inscribed Bragg wavelengths and the displacement ratio of the diamond bridge of interfering fringe can be defined by selecting the wedges with different tilt angles.

关 键 词：Talbot干涉仪 光纤BRAGG光栅 Bragg波长 位移 紫外反射镜 光学设计 楔块调整式 

分 类 号：TH744.3[机械工程—光学工程]