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. Author manuscript; available in PMC: 2019 Jul 25.
Published in final edited form as: J Phys Chem Lett. 2019 Jun 13;10(13):3563–3570. doi: 10.1021/acs.jpclett.9b01289

Fig. 1. New stimulated Raman excited fluorescence (SREF) laser microscopy system opening excitation band near 600-nm.

Fig. 1

(a) Energy diagram for SREF process. (b) Wavelength of SHG of OPO idler (red) and corresponding resonance Raman shift (blue) as a function of OPO signal wavelength when OPO signal is set as Stoke beam and the SHG is set as pump beam. (c) System setup for SREF excitation band around 600-nm. PPLN, periodically poled Lithium Niobate; QWP, quarter-wave plate; DM, dichroic mirror; PBS, polarization beam splitter; BS, beam splitter; SPCM, single photon counting module; DAC, digital-to-analog converter; ADC, analog-to-digital converter; EOM, electro-optical modulator; APD, avalanched photodiode; PD, photodiode.