Simple electrical modulation scheme for laser feedback imaging
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In this work, we demonstrate a simple square-wave electrical modulation scheme for imaging with laser feedback interferometry (LFI). Distinct advantages of this scheme include (a) the straightforward creation of the modulating signal, even for high-current lasers, and (b) its natural suitability for lock-in detection. We compare this simple scheme against two established imaging modalities for LFI: mechanical modulation using an optical chopper and 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.
Bertling , K , Taimre , T , Agnew , G , Lim , Y , Dean , P , Indjin , D , Höfling , S , Weih , R , Kamp , M , von Edlinger , M , Koeth , J & Rakic , A 2016 , ' Simple electrical modulation scheme for laser feedback imaging ' Sensors Journal, IEEE , vol 16 , no. 7 . DOI: 10.1109/JSEN.2015.2507184
Sensors Journal, IEEE
© 2015 IEEE. This work is made available online in accordance with the publisher’s policies. This is the final published version of the work, which was originally published at https://dx.doi.org/10.1109/JSEN.2015.2507184
The authors acknowledge support the European Cooperation in Science and Technology (COST) Action BM1205. This research was supported under Australian Research Council’s Discovery Projects funding scheme (DP 120 103703) and the State of Bavaria. Y.L.L. acknowledges support under the Queensland Government’s Smart Futures Fellowships programme. P.D. acknowledges support from the EPSRC (UK). S. H. gratefully acknowledges support by the Royal Society and the Wolfson Foundation.