Abstract
In this paper, a method based on the non-uniform sampling theory is proposed to recover remote target’s displacement from laser optical feedback interferometry (OFI) signals. The laser diode is operated in moderate optical feedback regime and is modulated with a sinusoidal dithering signal via laser diode current drive modulation. This dithering signal allows the recovery of sub-λ/2 displacements. The proposed method relies only on OFI’s fringe detection to recover the target’s displacement. The results are compared with mechanical dithering of the target. Using a laser diode emitting at 1550 nm, the measured white noise power spectral density is approximately$3.4{\text{nm}}/\sqrt {{\text{Hz}}} $.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
