Simple laser velocimeter that uses photoconductive semiconductors to measure optical frequency differences.


The dc photocurrents generated by steady-state moving space-charge fields inside photoconductive semiconductors containing deep level donors and traps can be used to determine the relative frequency differences between the two interfering optical fields that establish the space-charge fields. A simple laser velocimeter that uses a semi-insulating GaAs:Cr… (More)
DOI: 10.1364/AO.34.006496