3 March 2017 Photoacoustic remote sensing microscopy with lock-in amplification
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High sensitive detection with lock-in amplification can provide high signal noise ratio even when noise is in orders of magnitude higher than the signal. Here we report to combine lock-in amplification with a novel photoacoustic remote sensing (PARS) technology to achieve high resolution, high contrast, all optical non-contact photoacoustic imaging at depth beyond optical scattering limitation. We demonstrate phantom measurements from PARS with lock-in technology were several orders of magnitude more sensitive than those from PARS with the broadband detection techniques.
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Wei Shi, Parsin Hajireza, Kevan Bell, Roger Zemp, "Photoacoustic remote sensing microscopy with lock-in amplification", Proc. SPIE 10064, Photons Plus Ultrasound: Imaging and Sensing 2017, 1006447 (3 March 2017); doi: 10.1117/12.2253195; https://doi.org/10.1117/12.2253195

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