Fully parallelised read-out of a Fabry-Perot ultrasound sensor using an InGaAs camera for fast photoacoustic imaging (Conference Presentation)

Fabry-Perot (FP) based scanners are typically interrogated by scanning a single focused laser beam over its surface and measuring the reflected light. However, this approach can be relatively slow with acquisition times on the order of minutes. An alternative is to parallelise the read-out of the Fabry-Perot sensor by illuminating it with a large diameter collimated interrogation beam (e.g. 1 cm) and measuring the reflected light using an InGaAs camera. This approach allows acquiring 3D photoacoustic images in sub-second time frames. To demonstrate this speed advantage, a camera based FP scanner was developed and evaluated.