21 August 2014 Design about a novel encapsulation structure of DFB fiber laser hydrophones
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Proceedings Volume 9233, International Symposium on Photonics and Optoelectronics 2014; 92330X (2014) https://doi.org/10.1117/12.2066974
Event: International Symposium on Photonics and Optoelectronics (SOPO 2014), 2014, Suzhou, China
Abstract
To restrain the fluctuation of the frequency response curves of the Distributed Feedback (DFB) fiber laser applied in underwater sound detection, based on the principles of Helmholtz resonator, an encapsulation structure is designed, which via protective effects of the trepanning sleeve and the tension added to both ends of the fiber laser. The dynamics is numerically analyzed using the finite element software ANSYS, and the prototype of the new kind of hydrophone based on the structure is manufactured and tested utilizing the vibration jet-method. The results showed that the fluctuation of the frequency response of the DFB fiber laser was restrained effectively within the frequency range of 20 Hz to 800 Hz, and acoustic pressure sensitivity reached to -131dB with the fluctuation less than ±1.5dB.
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Bo Tan, Jun-bin Huang, "Design about a novel encapsulation structure of DFB fiber laser hydrophones", Proc. SPIE 9233, International Symposium on Photonics and Optoelectronics 2014, 92330X (21 August 2014); doi: 10.1117/12.2066974; https://doi.org/10.1117/12.2066974
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