Lasers, Fiber Optics, and Communications

Demodulation method of sensor based on tunable distributed feedback laser diode

[+] Author Affiliations
Huixuan Yao, Yi Ni, Yixuan Qin

Jiangnan University, School of Internet of Things Engineering, Lihu Avenue 1800#, Wuxi 214122, China

Yu Guo

Jiangnan University, School of Internet of Things Engineering, Lihu Avenue 1800#, Wuxi 214122, China

Nanjing University, School of Engineering and Applied Sciences, Microwave Photonics Technology Laboratory, Hankou Road 22#, Nanjing 210093, China

Xiangfei Chen

Nanjing University, School of Engineering and Applied Sciences, Microwave Photonics Technology Laboratory, Hankou Road 22#, Nanjing 210093, China

Opt. Eng. 55(10), 106126 (Oct 27, 2016). doi:10.1117/1.OE.55.10.106126
History: Received July 6, 2016; Accepted October 7, 2016
Text Size: A A A

Abstract.  A fiber Bragg grating (FBG) wavelength shift demodulation method based on tunable distributed feedback laser diode (DFB-LD) is proposed. A highly effective algorithm is proposed to demodulate the strain of the sensing FBG, which is scanned by the tunable DFB-LD. The system is unique in that accurate demodulation can be achieved by scanning only a 0.4-nm bandwidth FBG spectrum instead of relying on scanning the FBG’s principal power peak and the scanned spectrum can be any part of the FBG. Thus, the demodulation system is much more simplified in comparison to a traditional demodulation system, which enables using wavelength-division multiplexing for the FBG sensing network. With the strain experiment of the FBG, the results match the theory of the proposed demodulation method very well, and the errors of the strain experiment are within 2 pm. The tunable DFB-LD is based on reconstruction-equivalent chirp (REC) technology. The REC technology potentially offers a low-price, compact, and high-performance solution for the demodulation.

Figures in this Article
© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Huixuan Yao ; Yi Ni ; Yu Guo ; Xiangfei Chen and Yixuan Qin
"Demodulation method of sensor based on tunable distributed feedback laser diode", Opt. Eng. 55(10), 106126 (Oct 27, 2016). ; http://dx.doi.org/10.1117/1.OE.55.10.106126


Access This Article
Sign in or Create a personal account to Buy this article ($20 for members, $25 for non-members).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging & repositioning the boxes below.

Related Book Chapters

Topic Collections

Advertisement
  • Don't have an account?
  • Subscribe to the SPIE Digital Library
  • Create a FREE account to sign up for Digital Library content alerts and gain access to institutional subscriptions remotely.
Access This Article
Sign in or Create a personal account to Buy this article ($20 for members, $25 for non-members).
Access This Proceeding
Sign in or Create a personal account to Buy this article ($15 for members, $18 for non-members).
Access This Chapter

Access to SPIE eBooks is limited to subscribing institutions and is not available as part of a personal subscription. Print or electronic versions of individual SPIE books may be purchased via SPIE.org.