A fiber laser hydrophone

Foster, Scott; Tikhomirov, Alexei; Milnes, M.; Velzen, John van; Hardy, G.

doi:10.1117/12.623273

Cited by 57 publications

(24 citation statements)

References 6 publications

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“…The pressure induced wavelength shift for a bare fiber Bragg grating is only −3 × 10 −9 nm/Pa [14]. Although the pressure sensitivity can be significantly enhanced by coating fiber Bragg grating or fiber grating laser with elastomer material [10,11] or incorporating them into appropriate structure [12], the interferometric detection is required to read out the small wavelength shift induced by acoustic signal. This greatly complicates the sensor multiplexing.…”

Section: Introductionmentioning

confidence: 99%

“…Various fiber optic hydrophones based on intensity modulation were also demonstrated, including those utilize the principle of microbending [4], the lateral misalignment between two fiber ends [5], the frustrated total internal reflection [6], and the change of coupling ratio of fiber coupler in response to acoustic signals [7]. Recently, fiber optic hydrophones based on fiber Bragg grating [8][9][10] or fiber grating laser [11][12][13] have attracted attention. Their working principle is based on the change of operation wavelength of fiber Bragg gratings or fiber grating lasers in response to acoustic pressure.…”

Section: Introductionmentioning

confidence: 99%

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Dual polarization fiber grating laser hydrophone

Guan¹,

Tan²,

Tam³

2009

Opt. Express

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A novel fiber optic hydrophone based on the integration of a dual polarization fiber grating laser and an elastic diaphragm is proposed and experimentally demonstrated. The diaphragm transforms the acoustic pressure into transversal force acting on the laser cavity which changes the fiber birefringence and therefore the beat frequency between the two polarization lines. The proposed hydrophone has advantages of ease of interrogation, absolute frequency encoding, and capability to multiplex a number of sensors on a single fiber by use of frequency division multiplexing technique. 113-117 (1980). 7. R. Chen, G. F. Fernando, T. Butler, and R. A. Badcock, "A novel ultrasound fiber optic sensor based on a fusedtapered optical fiber coupler," Meas. Sci. Technol. 15(8), 1490-1495). 8. N. Takahashi, S., Takahashi, and K. Tetsumura, "Fiber-Bragg-grating underwater acoustic sensor," in Proc. 13th Int. Conf. Optical Fiber Sensors, Kyongju, Korea, 565-568 (1999. 9. N. Takahashi, K. Yoshimura, S. Takahashi, and K. Imamura, ""Characteristics of fiber Bragg grating hydrophone," IEICE Trans. Electron," E 83-C, 275-281 (2000). 10. J. H. Cole, C. Sunderman, A. B. Tveten, C. Kirkendall, and A. Dandridge, "Preliminary investigation of airincluded polymer coatings for enhanced sensitivity of fiber-optic acoustic sensors," In Proc. 15th Int. Conf. ©2009 Optical Society of America

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dual polarization fiber grating laser hydrophone

Guan¹,

Tan²,

Tam³

2009

Opt. Express

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“…We can illustrate this using an example of a fiber laser hydrophone [8] with acoustic of sensitivity 100 dB re [Hz/Pa]. For comparison the equivalent laser noise which corresponds to the lowest ocean acoustic noise and the sea noise at wind velocity of 5 knots [9] are plotted in Fig.5 The actual FL noise is just above (3dB) the lowest ocean noise (curve d) and clearly below the 5 knots curve (curve e) in the range 100Hz-to 10kHz.…”

Section: Resultsmentioning

confidence: 98%

DFB FL sensor multiplexing noise

Tikhomirov

Foster

2006

ACOFT/AOS 2006 - Australian Conference on Optical Fibre Technology/Australian Optical Society

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“…Because the demodulation of dynamic signal is more difficult than that of static signal. Fiber-optic vibration sensors have been widely used in lots of fields such as earthquake monitoring [6], hydroelectric dam monitoring [7] and hydrophone [8]. In particular, the earthquake happens more frequently these years that makes fiber-optic vibration sensors become more and more important than ever before.…”

Section: Introductionmentioning

confidence: 99%

Multi-longitudinal mode fiber-optic vibration sensor

Gao

Liu

Yin

et al. 2011

2011 International Topical Meeting on Microwave Photonics Jointly Held With the 2011 Asia-Pacific Microwave Photonics Conferenc

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A novel multi-longitudinal mode fiber-optic vibration sensor is presented in this paper. It is made of a piece of fiber, a fiber Bragg grating and a coupler. The beat frequency of any two different laser modes is modulated by the vibration signal. The modulated beat frequency signal is frequency-modulated signal, thus it can be demodulated with the simple frequency-modulation technique. It is demonstrated that the vibration signal from 60 Hz to 20 KHz can be measured successfully. The sensor has high signal-to-noise ratio, especially between 500 Hz and 10 KHz.

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A fiber laser hydrophone

Cited by 57 publications

References 6 publications

Dual polarization fiber grating laser hydrophone

Dual polarization fiber grating laser hydrophone

DFB FL sensor multiplexing noise

Multi-longitudinal mode fiber-optic vibration sensor

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