Air-coupled ultrasound detection using capillary-based optical ring resonators
Abstract We experimentally demonstrate and theoretically analyze high Q-factor (~107) capillary-based optical ring resonators for non-contact detection of air-coupled ultrasound. Noise equivalent pressures in air as low as 215 mPa/√Hz and 41 mPa/√Hz at 50 kHz and 800 kHz in air, respectively, are ac...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Nature Publishing Group
2017-03-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-017-00134-7 |