Abstract
An in-fiber quasi-Michelson interferometer working on reflection is proposed and experimentally demonstrated. The device consists of a short section of multimode fiber (MMF) followed by a single-mode fiber (SMF) whose end face is terminated by a thick silver film. The MMF excites cladding modes into downstream SMF via the mismatched-core splicing interface. The core–cladding modes are reflected back by the silver film and recoupled to the core of lead-in SMF through the MMF. A well-defined interference pattern is obtained as the result of core–cladding mode interference. A configuration with a 40 mm pigtail SMF at a wavelength of 1528 nm exhibits a water level sensitivity of and a liquid refractive index sensitivity of (refractive index unit). In addition, the selected dip provides a considered temperature sensitivity of and a high displacement sensitivity of .
© 2013 Optical Society of America
Full Article | PDF ArticleMore Like This
Yanying Du, Xueguang Qiao, Qiangzhou Rong, Jing Zhang, Dingyi Feng, Ruohui Wang, Hao Sun, Manli Hu, and Zhongyao Feng
Appl. Opt. 52(15) 3591-3596 (2013)
Meng Jiang, A. Ping Zhang, Yang-Chun Wang, Hwa-Yaw Tam, and Sailing He
Opt. Express 17(20) 17976-17982 (2009)
Qiangzhou Rong, Xueguang Qiao, Tuan Guo, Hangzhou Yang, Yanying Du, Dan Su, Ruohui Wang, Dingyi Feng, Manli Hu, and Zhongyao Feng
Opt. Express 21(15) 17576-17585 (2013)