Fig. 1.

Panel a shows a diagram of the optical set up for illumination channels with the relative locations of filters and Leoni optical fiber switch. Briefly, laser light (λ = 785 nm) was delivered into a fluorocarbon polymer (Cytop) fiber and passed through a short-pass filter into telescoping optics and coupled into the Leoni switch. A custom Matlab script was written to automatically illuminate individual excitation optical fibers E1-E5. Panel b shows the Raman spectrum of Cytop polymer with no short pass filter in the optical train (upper spectrum) and with an 842 nm short pass filter (bottom spectrum).