Wide-band polarization-insensitive fiber optic acoustic sensors

Sung-Tsun Shih

doi:10.1117/1.601929

1 March 1998 Wide-band polarization-insensitive fiber optic acoustic sensors

Sung-Tsun Shih

Optical Engineering, Vol. 37, Issue 3, (March 1998). https://doi.org/10.1117/1.601929

A polarization-insensitive fiber optic acoustic sensor is constructed with a 3x3 coupler and Faraday rotator mirrors. This system deals with the polarization-induced signal fading by a passive method. The method in eliminating polarization-induced signal fading and the output intensities of this system are described and demonstrated. The homodyne symmetric demodulation system used to recover the sensing signal is also analyzed in detail with experimental verification. The sensing head of this sensor is made of single mode optical fiber wound into a cylindrical shell with cast polyurethane rubber as the acoustic window. The sensitivity of this sensor is measured in anechoic water tank. The results show that this sensor has a stable receiving sensitivity of - 145.5 dB re 1V/?Pa and the bandwidth extends from 2 to 50 kHz. This sensor configuration can be used as a high sensitivity, wide band underwater acoustic sensor.

Citation Download Citation

Sung-Tsun Shih "Wide-band polarization-insensitive fiber optic acoustic sensors," Optical Engineering 37(3), (1 March 1998). https://doi.org/10.1117/1.601929

Published: 1 March 1998

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