Simple Electrical Modulation Scheme for Laser Feedback Imaging

In this paper, we demonstrate a simple square-wave electrical modulation scheme for imaging with laser feedback interferometry (LFI). Distinct advantages of this scheme include: 1) the straightforward creation of the modulating signal, even for high-current lasers and 2) its natural suitability for...

Full description

Saved in:
Bibliographic Details
Published in:IEEE sensors journal 2016-04, Vol.16 (7), p.1937-1942
Main Authors: Bertling, Karl, Taimre, Thomas, Agnew, Gary, Yah Leng Lim, Dean, Paul, Indjin, Dragan, Hofling, Sven, Weih, Robert, Kamp, Martin, von Edlinger, Michael, Koeth, Johannes, Rakic, Aleksandar D.
Format: Article
Language:English
Subjects:
Artefacts
Choppers
Choppers (circuits)
Feedback
Frequency modulation
Imaging
Interferometry
Lasers
Modulation
Optical feedback
Optical modulation
Optical sensors
Sensors
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In this paper, we demonstrate a simple square-wave electrical modulation scheme for imaging with laser feedback interferometry (LFI). Distinct advantages of this scheme include: 1) the straightforward creation of the modulating signal, even for high-current lasers and 2) its natural suitability for lock-in detection. We compare this simple scheme against two established imaging modalities for LFI: 1) mechanical modulation using an optical chopper and 2) the swept-frequency feedback interferometry approach. The proposed scheme lends itself to high-frequency modulation, which paves the way for high frame-rate LFI imaging with no motion artefacts using off-the-shelf equipment.
ISSN:1530-437X
1558-1748
DOI:10.1109/JSEN.2015.2507184