Core Mode-Cladding Supermode Modal Interferometer and High-Temperature Sensing Application Based on All-Solid Photonic Bandgap Fiber

Author

Tan, Xiao Liang ; Geng, Y.F. ; Li, X.J. ; Yu, Y.Q. ; Deng, Y.L. ; Yin, Zheng ; Gao, Ran

Author_Institution

Shenzhen Key Lab. of Sensor Technol., Shenzhen Univ., Shenzhen, China

Volume

6

Issue

1

fYear

2014

fDate

Feb. 2014

Firstpage

1

Lastpage

7

Abstract

A core-mode-cladding-supermode modal interferometer with all-solid photonic bandgap fiber (AS-PBF) is constructed, and a reflective Michelson-type high-temperature sensor is fabricated. Such a fiber sensor is constituted by a small segment of AS-PBF and a leading single-mode fiber. The splice region of the two fibers is weakly tapered to excite the cladding supermode. Both the interference spectra and the near-field infrared CCD images verify that the LP01 cladding supermode is effectively excited and interferes with the LP01 core mode, which agrees well with theoretical results. Benefiting from a large effective thermooptic coefficient between the two modes, temperature sensitivity up to 0.111 nm/°C at 500 ^°C is obtained in experiment. The proposed sensor is compact and easy to fabricate, which makes it very attractive for high-temperature sensing applications.

Keywords

fibre optic sensors; high-temperature techniques; light interferometers; photonic band gap; thermo-optical devices; all-solid photonic bandgap fiber; core mode-cladding supermode modal interferometer; interference spectra; leading single-mode fiber; near-field infrared CCD images; reflective Michelson-type high-temperature sensor; splice region; thermooptic coefficient; Interference; Optical fiber sensors; Optical interferometry; Sensitivity; Temperature measurement; Temperature sensors; All-solid photonic bandgap fiber; modal interference; temperature sensor;

fLanguage

English

Journal_Title

Photonics Journal, IEEE

Publisher

ieee

ISSN

1943-0655

Type

jour

DOI

10.1109/JPHOT.2014.2303571

Filename

6728608