Figure 2: Setup of the TICO-Raman system.
From: A Time-Encoded Technique for fibre-based hyperspectral broadband stimulated Raman microscopy
(a) The fibre based, wavelength-swept FDML probe laser25. FC, fibre coupler; FFP-TF, fibre Fabry-Pérot tuneable filter; ISO, optical isolator; SOA, semiconductor optical amplifier. (b) The homebuilt fibre-based pump laser is digitally synchronized to the FDML. EOM, electro-optic modulator; WDM, wavelength division multiplexer; YDFA, ytterbium-doped fibre amplifier. (c) The lasers are combined in the beam delivery unit and focused onto the sample. The SRG signal is detected after subtraction of the offset by a differential balanced photodetector (BPD). (d) Digital synchronization is employed by an inter-channel locked arbitrary waveform generator driving the whole TICO system. The SRG signals are directly sampled at 1.6 GS s−1 with a fast analogue-to-digital converter card and processed on a personal computer (PC).
