Analytic phase retrieval of dynamic optical feedback signals for laser vibrometry
- Resource Type
- Conference
- Authors
- Luna Arriaga, Antonio; Bony, Francis; Bosch, Thierry
- Source
- IEEE SENSORS 2014 Proceedings SENSORS, 2014 IEEE. :762-765 Nov, 2014
- Subject
- General Topics for Engineers
Optical interferometry
Shape
Optical feedback
Couplings
Hysteresis
Frequency-domain analysis
Phase estimation
- Language
- ISSN
- 1930-0395
This paper presents a robust phase estimation to detect fringes of self-mixing signals for all feedback levels. It aims to avoid the need of restricting a particular working feedback regime for a sensor which is usually done by external optical/mechanical components. By removing the local offset from a set of fringes, their orthogonal representation can be obtained through the Hilbert transform allowing a unique calculation disregarding their shape in time. From it, it is possible to retrieve the displacement of a pointed target from a wide variety of usage conditions. The pertinence of the proposed approach for sensor implementation is also demonstrated.