Dual-clad fiber couplers allow combining coherent imaging and diffuse sensing within the same instrument. Since the technology's lab-to-market transfer, several groups reported on its application to OCT, confocal microscopy, and hyperspectral imaging, to name a few. From this initial design, our group has focused on other dedicated optical fiber couplers for biomedical imaging, namely: multimode circulators, bi-directional couplers, and modally-specific photonic lanterns. This presentation will review the application of these recent innovations in the context of biomedical imaging and sensing.
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