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A Study on The Multi-point Signal and It's Directivity detection of FBG Hydrophone Using Hopper WDM be in The Making
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 Title & Authors
A Study on The Multi-point Signal and It's Directivity detection of FBG Hydrophone Using Hopper WDM be in The Making
Kim, Kyung Bok;
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In the using of FBG(Fiber Bragg Grating) developed in home land, we designed and manufactured united FBG acoustic transducers the first in Korea. they are being applied to multi-point signal detection of FBG Hydrophone used Hopper WDM(national patent NO 10-1502954) in the underwater. On united FBG transducers manufactured, we made an demonstrated on respective frequency response peculiarities in the underwater and analyzed the special characters. As the experimental result on frequency response peculiarities, we made it possible underwater acoustic detection on united FBG acoustic transducers type to maximum 30Hz~2.5KHz. it's the optimum conditions of 1.2KHz frequency in detection. And for the purpose of realization on multi-point signal detection on wide scope in the underwater, in the using of WDM(Wavelength Division Multiplexing) method and passive band-pass filter system, established arrays system and succeeded in multi-point underwater acoustic signal detection to the frequency 200Hz~1.3KHz out of the two united type FBG transducers. Additionally, it would be possible directivity detection for the object of its source as the intensity of detection signal varies with the sound source's direction and angle. From now on we prepared a new moment on the practical use study on FBG hydrophone in the future.
acoustic-wave optical fiber sensor;united FBG transducer;low-frequency signal detection;FBG Hydrophone;FBG Hydrophone array system;Hopper WDM/;
 Cited by
Hopper lens type WDM 설계 및 제작 연구,김경복;

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