期刊
OPTICS EXPRESS
卷 23, 期 5, 页码 5850-5860出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.23.005850
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资金
- Centre for Defence Enterprise
- Defence Science and Technology Laboratory, UK
We present results of what are believed to be the first underwater acoustic sensor using an optical micro-knot resonator. The mechanism involves straining the micro-fibre loop of the knot via an appropriate encapsulation material. The micro-knot sensor exhibited a spectral full-width half-depth of 37.7pm with a Q-factor of 41100 after deconvolution with the source. The shift in wavelength at 1550nm was observed to be around 67pm RMS when exposed to underwater acoustic excitation at 40Hz demonstrating a normalized sensitivity of -288 dB re mu Pa-1, or 5.83 fm/Pa. (C) 2015 Optical Society of America
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