Fig. 1: Coherent Raman endoscope overview.
From: High-resolution multimodal flexible coherent Raman endoscope
A tunable femtosecond laser provides two synchronized pulse trains that are injected into the hollow-core fiber probe to perform CARS, SHG, and TPEF endoscopy. The light emitted by the sample is collected by and back-propagates through the same fiber (1 m long) before detection by large area photomultiplier detectors. The inset picture shows the endoscope probe head inserted into its stainless steel housing
