Weak fiber grating demodulator based on distributed feedback laser array

Tian Kai

doi:10.1117/12.2590822

18 March 2021 Weak fiber grating demodulator based on distributed feedback laser array

Tian Kai

Author Affiliations +

Proceedings Volume 11780, Global Intelligent Industry Conference 2020; 117801Y (2021) https://doi.org/10.1117/12.2590822
Event: Global Intelligent Industry Conference 2020, 2020, Guangzhou, China

Abstract

A weak fiber grating demodulator based on the distributed feedback laser array (DFB-LA) was proposed used for the large-capacity ultra-weak fiber grating sensor network. This article describes the overall design, DFB-LA-based tunable narrow linewidth pulse light source module, and control demodulation process in detail. After design, the narrow linewidth tunable light source module composed of DFB-LA can realize nanosecond laser pulse output with a wide tuning range of 30nm. A prototype of a weak fiber grating（W-FBG） demodulator was developed, and a sensor demodulation test was carried out with an ultra-weak fiber grating with a reflectivity of -30dBm. The test results show that the system is stable. The prototype achieves a wavelength measurement range of 27nm and a resolution of 1.4pm. The measured W-FBG wavelength-temperature coefficient is 11.88pm/℃ and the temperature resolution is 0.1°C.

Citation Download Citation

Tian Kai "Weak fiber grating demodulator based on distributed feedback laser array", Proc. SPIE 11780, Global Intelligent Industry Conference 2020, 117801Y (18 March 2021); https://doi.org/10.1117/12.2590822

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