Optical Ultrasound Generation and Detection for Intravascular Imaging: A Review

Figure 5

Major embodiments of fiber optic Fabry-Perot (FP) ultrasound detectors. (a) A schematic illustration of a FP sensor with a cylindric etalon cavity. (b) A gray scale microscopic image of a rounded-tip fiber with a concave etalon cavity. The design of endoscopic imaging probes with (c) forward-looking and (d) sideways-looking configurations. (e) The design of a highly sensitive planoconcave microresonator ultrasound sensor. Reproduced with permission, from [36] for (a); Copyright 2009, AIP Publishing, from [37] for (b); Copyright 2015, Zhang et al. from [38] for (c) and (d); and Copyright 2011, Zhang et al. from [39] for (e), Copyright 2017, Springer Nature.

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