At the Helios laser facility two of the eight CO2 laser beam lines have collecting optics for obtaining f/2.4 samples of direct backscattered light. One of these two retrochannels utilizes a fast pyroelectric detector and fast oscilloscope (combined rise time of ~ 150 psec) to observe the temporal behavior of both the fundamental 10.6-μm backscatter and also the target plasma-generated second harmonic of the laser light.

© 1982 Optical Society of America

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