Fiber inline Michelson interferometer fabricated by CO2 laser irradiation for refractive index sensing

Hongbin Wu; Lei Yuan; Longjiang Zhao; Zhitao Cao; Peng Wang

doi:10.1117/12.2040114

7 March 2014 Fiber inline Michelson interferometer fabricated by CO₂ laser irradiation for refractive index sensing

Hongbin Wu, Lei Yuan, Longjiang Zhao, Zhitao Cao, Peng Wang

Proceedings Volume 8974, Advanced Fabrication Technologies for Micro/Nano Optics and Photonics VII; 89741D (2014) https://doi.org/10.1117/12.2040114
Event: SPIE MOEMS-MEMS, 2014, San Francisco, California, United States

Abstract

A compact Michelson interferometer (MI) in a single-mode fiber (SMF) is successfully formed by CO₂ laser irradiation to measure refractive index (RI) values. The fiber inline MI mainly consists of two parts: one is the waist region in fiber formed by CO₂ laser irradiation and the other one is the fiber tip end facet with pure gold sputter coating. Based on the MI theory, the interference signal is generate between the core mode and the cladding mode excited by the core mode at the waist region. Reflective spectra at two different interference lengths of 5mm and 15mm are given and the calculated lengths based on theory are well verified. After the measurements of matching liquids with seven different refractive indices, the RI sensitivity of the MI sample is tested of -197.3±19.1nm/RIU (refractive index unit), which suggests well potential application in RI sensing.

Citation Download Citation

Hongbin Wu, Lei Yuan, Longjiang Zhao, Zhitao Cao, and Peng Wang "Fiber inline Michelson interferometer fabricated by CO₂ laser irradiation for refractive index sensing", Proc. SPIE 8974, Advanced Fabrication Technologies for Micro/Nano Optics and Photonics VII, 89741D (7 March 2014); https://doi.org/10.1117/12.2040114

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available