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Dual-beam OCT imaging setup. BPD: Balanced photo-receiver; PC: polarization controller; DC: dispersion compensating glass blocks; Recal.: recalibration arm; Ref.: reference arm; Galvo: galvanometer mirrors (x and y), L1/L2: relay lenses; BS: beam-splitter; TG: target; DM: Dichroic mirror. All fiber couplers (blue) have a 50/50 coupling ratio.
