The sensitivity of fiber Bragg grating based chemical sensor

Zhaofang Meng; Binbin Yan; Xinzhu Sang; Chongxiu Yu; Kuiru Wang; Daxiong Xu

doi:10.1117/12.756606

11 January 2008 The sensitivity of fiber Bragg grating based chemical sensor

Zhaofang Meng, Binbin Yan, Xinzhu Sang, Chongxiu Yu, Kuiru Wang, Daxiong Xu

Proceedings Volume 6830, Advanced Sensor Systems and Applications III; 68301I (2008) https://doi.org/10.1117/12.756606
Event: Photonics Asia 2007, 2007, Beijing, China

Abstract

The chemical sensing principle based on Fiber Bragg Grating (FBG) is presented. By deriving the relation between effective core index and surrounding index of etched FBG, the relation between Bragg wavelength and concentration of chemical solutions is analyzed, which is demonstrated in the experiment by measuring propylene glycol solutions. The factors influencing the sensitivity of chemical sensing is investigated. The results show that, the sensitivity of the Bragg wavelength of FBGs to the surrounding index can be enhanced with decreasing the diameter of FBGs by etching the fiber with HF solution. The sensitivity can be appreciably enhanced by etching the fiber diameters as small as 5.0 μm. A maximum sensitivity of 911.8 nm/riu is achieved. Since a shift of 0.01 nm can be detected, this leads to a detectable change of 1.1×10^-5 in the surrounding index.

Citation Download Citation

Zhaofang Meng, Binbin Yan, Xinzhu Sang, Chongxiu Yu, Kuiru Wang, and Daxiong Xu "The sensitivity of fiber Bragg grating based chemical sensor", Proc. SPIE 6830, Advanced Sensor Systems and Applications III, 68301I (11 January 2008); https://doi.org/10.1117/12.756606

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