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- Title
All-Fiber Laser Feedback Interferometry for Sequential Sensing of In-Plane and Out-of-Plane Displacements.
- Authors
Xie, Zhanwu; Zhang, Meng; Li, Jie; Xia, Wei; Guo, Dongmei
- Abstract
In this paper, an all-fiber laser feedback interferometer (LFI) with a diffraction grating was developed for sequential measurement of in-plane and out-of-plane displacements without changing the optical arrangement. When the light emitted from an erbium-doped fiber ring laser is incident on a reflection grating at the Littrow angle, the diffracted light will return into the laser cavity along the original path, thus generating laser feedback interference. Experimental results reveal that the all-fiber system could achieve a precision of 40 nm in both in-plane and out-of-plane displacements sensing. Compared with the traditional all-fiber LFI, the proposed sensing system transfers the measuring scale from laser wavelength to grating period, and it has the advantages of good anti-interference performance and reliability.
- Subjects
LASER interferometry; FIBER lasers; RING lasers; DIFFRACTION gratings; LASER interferometers; SENSES
- Publication
Photonics, 2023, Vol 10, Issue 4, p480
- ISSN
2304-6732
- Publication type
Article
- DOI
10.3390/photonics10040480