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 ' , IEEE Sensors Journal , vol. 16 , no. 7 . https://doi.org/10.1109/JSEN.2015.2507184
IEEE Sensors Journal
© 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