Cladding-mode obtained by core-offset structure and applied in fiber Bragg grating sensor

Xinpu Zhang; Wei Peng; Yun Liu; Hong Li; Zhenguo Jing; Qi Yu; Xinlei Zhou; Wenjuan Yao; Yanjie Wang; Yuzhang Liang

doi:10.1117/12.905319

29 November 2011 Cladding-mode obtained by core-offset structure and applied in fiber Bragg grating sensor

Xinpu Zhang, Wei Peng, Yun Liu, Hong Li, Zhenguo Jing, Qi Yu, Xinlei Zhou, Wenjuan Yao, Yanjie Wang, Yuzhang Liang

Proceedings Volume 8307, Passive Components and Fiber-Based Devices VIII; 83070X (2011) https://doi.org/10.1117/12.905319
Event: SPIE/OSA/IEEE Asia Communications and Photonics, 2011, Shanghai, China

Abstract

Comparing to core-modes of optical fibers, some cladding-modes are more sensitive to the surroundings which are very valuable to sensing application; recently, a novel type of FBG sensor with core-offset structure attracts more and more interests. Normally, the forward core-mode is not only reflected and coupled to the backward core mode by the Fiber Bragg Grating in the step-type photosensitive single mode fiber, but also coupled to the backward cladding-modes and the radiation modes, eventually they will leak or be absorbed by the high refraction index coating layer. These backward cladding-modes can also be used for sensing analysis. In this paper, we propose and develop a core-offset structure to obtain the backward core-mode and backward cladding-modes by using the wavelength shift of the backward core-mode and the power of the backward cladding-modes in Fiber Bragg Grating sensor, and the power of the backward cladding-modes are independent from temperature variation. We develop a mode coupling sensor model between the forward core-mode and the backward cladding-modes, and demonstrate two coupling methods in the core-offset structure experimentally. The sensor is fabricated and demonstrated for refractive index monitoring. Some specific works are under investigation now, more analysis and fabrication will be done to improve this cladding-mode based sensor design for applicable sensing technology.

Citation Download Citation

Xinpu Zhang, Wei Peng, Yun Liu, Hong Li, Zhenguo Jing, Qi Yu, Xinlei Zhou, Wenjuan Yao, Yanjie Wang, and Yuzhang Liang "Cladding-mode obtained by core-offset structure and applied in fiber Bragg grating sensor", Proc. SPIE 8307, Passive Components and Fiber-Based Devices VIII, 83070X (29 November 2011); https://doi.org/10.1117/12.905319

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

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
8 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Fiber Bragg gratings

Sensors

Refractive index

Cladding

Optical fibers

Liquids

Structured optical fibers

Show All Keywords

Keywords/Phrases

Search In:

Publication Years