Abstract
We report our recent work on distributed feedback fiber laser based hydrophones. Some issues related to sensitivity, such as fiber laser phase condition, demodulation, and packaging, are also discussed. With the development of appropriate digital signal processing (DSP) techniques and packaging designs, an interferometric-type distributed feedback (DFB) fiber laser hydrophone system with acoustic sensitivity of 58.0 dB·re·μPa·Hz−0.5 at 1 kHz or a minimum detectable acoustic pressure below 800 μPa during field test is attained. We have also investigated an intensity-type DFB fiber laser hydrophone system and its performance.
Highlights
Many applications are employing optical fiber sensors in preference to conventional electronic sensor
We report our recent work on distributed feedback fiber laser based hydrophones
We have investigated an intensity-type distributed feedback (DFB) fiber laser hydrophone system and its performance
Summary
Many applications are employing optical fiber sensors in preference to conventional electronic sensor. Asrul Izam AZMI et al.: Fiber Laser Based Hydrophone Systems components in analog circuits. Packaging technique is essential in many aspects [7,8,9,10], where it can greatly improve sensitivity, flatten frequency response, and provide protection to bare fiber to survive in harsh underwater environment. We have developed a new scheme using composite cavity fiber laser to provide additional means of sensitivity improvement [11]. Integration of these two components (i.e. DSP and packaging) is essential in realizing high performance fiber laser hydrophone system.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
