Optical micro-knot resonator hydrophone

被引：29

作者：

De Freitas, J. M. ^{[1
]}

Birks, T. A. ^{[2
]}

Rollings, M. ^{[2
]}

机构：

[1] Atlas Elekt UK Ltd, Winfrith DT2 8ZB, Dorset, England

[2] Univ Bath, Dept Phys, Bath BA2 7AY, Avon, England

来源：

OPTICS EXPRESS | 2015年 / 23卷 / 05期

关键词：

ULTRASOUND DETECTION; RING-RESONATOR; FABRICATION; SENSOR; TEMPERATURE; PRESSURE; FILTERS; FIBERS;

D O I：

10.1364/OE.23.005850

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

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

引用

页码：5850 / 5860

页数：11

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