Abstract

A new type of Mach–Zehnder interferometer device based on in-fiber optical waveguides, fabricated by direct femtosecond laser pulse inscription in a single-mode fiber has been demonstrated and successfully employed for temperature and strain measurement. The in-fiber waveguide can couple the light out from the fiber core and guide it along the cladding region before directing it back into the fiber core. Such an inner structured interferometer device is compact and robust, can be constructed in a flexible and precisely controlled manner, and hence is expected to have many potential applications.

© 2017 Optical Society of America

Femtosecond laser inscribed straight waveguide in no-core fiber for in-line Mach–Zehnder interferometer construction

W. W. Li and D. N. Wang
Opt. Lett. 43(14) 3405-3408 (2018)

Femtosecond laser-inscribed fiber interface Mach–Zehnder interferometer for temperature-insensitive refractive index measurement

Yunfang Zhang, Chupao Lin, Changrui Liao, Kaiming Yang, Zhengyong Li, and Yiping Wang
Opt. Lett. 43(18) 4421-4424 (2018)

Ultra-compact all-in-fiber-core Mach–Zehnder interferometer

Pengcheng Chen, Xuewen Shu, and Kate Sugden
Opt. Lett. 42(20) 4059-4062 (2017)

In-line reflective Mach–Zehnder interferometer based on a tilted in-fiber beam splitter

Hua Zhang and D. N. Wang
Opt. Lett. 44(4) 803-806 (2019)

Highly sensitive temperature sensor based on an ultra-compact Mach–Zehnder interferometer with side-opened channels

Ming Deng, Leiguang Liu, Yong Zhao, Guolu Yin, and Tao Zhu
Opt. Lett. 42(18) 3549-3552 (2017)