Coherent Pound-Drever-Hall technique for high resolution fiber optic strain sensor at very low light power

Mengxin Wu; Qingwen Liu; Jiageng Chen; Zuyuan He

doi:10.1117/12.2265298

23 April 2017 Coherent Pound-Drever-Hall technique for high resolution fiber optic strain sensor at very low light power

Mengxin Wu, Qingwen Liu, Jiageng Chen, Zuyuan He

Author Affiliations +

Proceedings Volume 10323, 25th International Conference on Optical Fiber Sensors; 103230V (2017) https://doi.org/10.1117/12.2265298
Event: 25th International Conference on Optical Fiber Sensors, 2017, Jeju, Korea, Republic of

Abstract

Pound-Drever-Hall (PDH) technique has been widely adopted for ultrahigh resolution fiber-optic sensors, but its performance degenerates seriously as the light power drops. To solve this problem, we developed a coherent PDH technique for weak optical signal detection, with which the signal-to-noise ratio (SNR) of demodulated PDH signal is dramatically improved. In the demonstrational experiments, a high resolution fiber-optic sensor using the proposed technique is realized, and n"-order strain resolution at a low light power down to -43 dBm is achieved, which is about 15 dB lower compared with classical PDH technique. The proposed coherent PDH technique has great potentials in longer distance and larger scale sensor networks.

Citation Download Citation

Mengxin Wu, Qingwen Liu, Jiageng Chen, and Zuyuan He "Coherent Pound-Drever-Hall technique for high resolution fiber optic strain sensor at very low light power", Proc. SPIE 10323, 25th International Conference on Optical Fiber Sensors, 103230V (23 April 2017); https://doi.org/10.1117/12.2265298

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