Time-correlated single photon Raman spectroscopy at megahertz repetition rates.

Significant improvements in time-correlated single photon counting (TCSPC) Raman spectroscopy acquisition times can be achieved through exploitation of megahertz (MHz) laser repetition rates. We have developed a TCSPC Raman spectroscopy system based on a high peak power (>40) pulsed laser, a high pulse repetition rate (40 MHz), a custom /1.5 spectrometer, and a 512 spectral channel × 16 time bin single photon avalanche diode line sensor.