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15 November 2010 DFB fiber laser hydrophone based on a intensity demodulation
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DFB Fiber laser based sensors, including strain sensing, temperature sensing and acoustic sensing, have attached a lot interests because of high performance and small size.We demonstrate a simple DFB fiber laser hydrophone and its demodulation is realized by a simple intensity based scheme. The reasons of the intensity modulation of DFB fiber laser, including gain demodulation, feedback effect, and polarization demodulation, are discussed in detail based on rate equations. The frequency response of the DFB fiber laser based hydrophone is measured in an anechoic water pool and compared with a referenced B&K8104 hydrophone.
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Xingliang Li, Quan Chai, Jianzhong Zhang, QianQian Hao, Qi Li, Ping Lu, Weimin Sun, Libo Yuan, and Gangding Peng "DFB fiber laser hydrophone based on a intensity demodulation", Proc. SPIE 7847, Optoelectronic Devices and Integration III, 78471F (15 November 2010);

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