Abstract
We propose a configuration of optical heterodyne micro-vibration detection based on an all-fiber acousto-optic superlattic modulation structure that acts as both frequency shifter and reflector, simultaneously. The vibration information within the frequency range between 1 Hz to 150 kHz of a piezoelectric mirror (PZM) has been experimentally measured by using this all-fiber optical heterodyne detection configuration. The minimal measurable vibration amplitude and the resolution are around 0.013 nm and 10 pm in the region of tens to hundreds of kilohertz, respectively. The configuration not only has advantages of compact size, easy alignment and non-contact measurement, but also gains high accuracy, which provides a promising alternative and could be applied in the compact and portable instruments based on optical heterodyne detection.
| Original language | English |
|---|---|
| Pages (from-to) | 3821-3824 |
| Number of pages | 4 |
| Journal | Journal of Lightwave Technology |
| Volume | 35 |
| Issue number | 18 |
| Early online date | 22 Jun 2017 |
| DOIs | |
| Publication status | Published - 15 Sept 2017 |
Bibliographical note
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- acousto-optic frequency shifter
- acousto-optic superlattice modulation
- fiber gratings
- micro-vibration
- optical heterodyne detection
- optical mixing
- optical reflection
- optical superlattices
- optical variables measurement
- vibrations