Acta Optica Sinica, Volume. 39, Issue 11, 1106003(2019)
20-mm-Diameter Interferometric Hydrophone Towed Array Based on Fiber Bragg Gratings
Based on a interferometric optical fiber hydrophone, a fiber Bragg grating (FBG) hydrophone towed array with a diameter of 20 mm is realized. This single-fiber hydrophone array without splices is realized by using the multi-wavelength FBG continuous writing technique. The average acoustic pressure sensitivity of a hydrophone unit is -143.9 dB, and the fluctuation of sensitivity is limited within 3 dB. To suppress the crosstalk in the FBG hydrophone array, weak-reflectivity FBGs are utilized,reducing the crosstalk to 53 dB. Moreover, polarization-induced fading is eliminated by three-channel polarization diversity receiving. A 32-element FBG hydrophone towed array with a diameter of 20 mm is fabricated.
Get Citation
Copy Citation Text
Zhen Guo, Kan Gao, Hui Yang, Zhiguo Dai, Bingyan Wu, Jun Zhang. 20-mm-Diameter Interferometric Hydrophone Towed Array Based on Fiber Bragg Gratings[J]. Acta Optica Sinica, 2019, 39(11): 1106003
Category: Fiber Optics and Optical Communications
Received: Jun. 3, 2019
Accepted: Jul. 15, 2019
Published Online: Nov. 6, 2019
The Author Email: Gao Kan (gaokan@siom.ac.cn)