Transient Optical Spectrophotometer

Transient Optical Spectrophotometer

A home designed and constructed transient optical spectrometer is used to perform time-resolved absorbance (300-700 nm) spectroscopy. Light excitation of samples is provided by a pulsed-Nd-YAG laser, and the photo-induced absorbance changes are followed on time-scales of 100 ns to milliseconds by using a continuous-wave measuring beam with photomultiplier tube detection. Signals are digitized with a fast digital sampling oscilloscope. The spectrometer is computer controlled by using software coded in LabVIEW.