物理学报2012，Vol.61Issue(17)：190-197,8.
飞秒激光刻蚀非平行壁光纤微腔Mach-Zehnder干涉仪特性及其流体传感研究
Study on characteristics and fluid sensing of unparallel wall fiber micro-cavity Mach-Zehnder interferometer fabricated by femtosecond laser micromachining
摘要
Abstract
It is found that two walls of fiber micro-cavity fabricated by femtosecond laser micromachining are not perpendicular to the fiber axis. Interference spectrum of the unparallel wall fiber micro-cavity Mach-Zehnder interferometer （MZI） shows abnormal character- istics, such as optical path difference decreasing linearly with wavelength increasing and the total loss decreasing with wavelength increasing. In this regard, we propose an unparalleled wall fiber micro-cavity MZI model and establish analytical theory. By using new models and theories, the new micro-cavity interferometer characteristics are studied, including that the effects of comer and depth on spectral peak wavelength are numerically analysed and transmission loss, absorption loss, insertion loss, infrared absorption loss of material as well as how they affect the interference fringe contrast are theoretically studied. Theoretical analyses and experimental results are in agreement with each other. For fluid sensing, a high-quality unparallel wall fiber micro-cavity MZI is fabricated. The interference fringe contrast of the fiber micro-cavity reaches up to 35 dB in water. Experimental results show that the sensor exhibits an ultrahigh RI sensitivities, as high as-12937.31 nm/RIU in aqueous solution of sucrose.关键词
光纤Mach—Zehnder干涉仪/非平行壁光纤微腔/飞秒激光微加工/流体传感Key words
fiber Mach-Zehnder interferometer/unparallel wall fiber micro-cavity/femtosecond laser microma- chining/fluid sensing分类
数理科学引用本文复制引用
殷丽梅,张伟刚,薛晓琳,白志勇,魏石磊..飞秒激光刻蚀非平行壁光纤微腔Mach-Zehnder干涉仪特性及其流体传感研究[J].物理学报,2012,61(17):190-197,8.基金项目
国家自然科学基金（批准号：10974100,10674075,60577018）,天津市应用基础与前沿技术研究计划重点项目（批准号：10JCZDJC24300）和光学信息技术教育部重点实验室开放课题基金资助的课题 （）
