AI Article Synopsis
- The study presents a coherent detection system utilizing an all-fiber setup at a wavelength of 1.55 micrometers, leveraging heterodyne self-mixing modulation.
- Key innovation involves serrodyne phase modulation with an integrated electro-optic modulator, simplifying detection for class B lasers.
- The system achieves precise nanometric displacement measurements of noncooperative targets by accurately detecting the optical phase difference between the laser field and backscattered signals.
Article Abstract
We describe an all-fiberized coherent detection system at 1.55 microm using heterodyne self-mixing modulation in a distributed-feedback fiber laser. Frequency shifting of the optical feedback is based on serrodyne phase modulation with an integrated electro-optic modulator, which is a significant advance in the simplification of the self-mixing detection scheme for class B lasers. Accurate measurement of the optical phase difference between the laser electric field and the backscattered electric field demonstrates nanometric displacement detection on noncooperative targets.
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| http://dx.doi.org/10.1364/ol.33.002746 | DOI Listing |
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