Patent ID: 6320663
Filing Date: 2001-11-20
Classification: G01J

Abstract:
A laser spectrometer for making spectral measurements of laser light from a high repetition rate pulse laser at rates of at least 1000 measurements per second, said spectrometer comprising:A) a double pass etalon device;B) a fast photodetector array;C) a process device configured to:1) process pulse information collected by said fast photodetector array during time intervals when said laser is lasing, said pulse information collected during each such interval defining a set of pulse information,2) processing noise information collected by said fast photodetector during time intervals when said laser is not lasing said noise information collected during each such interval defining a set of noise information,3) using at least some of said set of pulse information and said sets of noise information, calculating spectral qualities of said laser light at rates at least 1000 calculations per second.