Editing Time-resolved spectroscopy (section)

==Time-gated Raman spectroscopy==
The most common issue in conventional (CW) Raman spectroscopy (RS) is sample-induced fluorescence emission making the identification or quantification of materials challenging or impossible. An effective solution to this problem is time-gating (TG), which is a general technique used in signal processing.<ref>Breed G 2010 Fundamentals of pulsed and time-gated measurements High Freq. Electron. 9 1–4</ref> An integral part of Time-gated (TG) Raman spectroscopy (RS) is the temporally precise synchronization (picosecond range) between the pulsed laser excitation source and the sensitive and fast detector. The detector is able to collect the Raman signal during the short laser pulses, while fluorescence emission, which has a longer delay, is rejected during the detector dead-time. TG-Raman is also resistant against ambient light as well as thermal emissions, due to its short measurement duty cycle.<ref>Time-gated Raman Spectroscopy Review. Martin Kögler and Bryan Heilala 2020 Meas. Sci. Technol. 32 012002DOI 10.1088/1361-6501/abb044 {{Creative Commons text attribution notice|cc=by4|url=https://iopscience.iop.org/article/10.1088/1361-6501/abb044}}</ref>