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INTERNAL Q SWITCHING OF Ho3+‐STIMULATED EMISSION IN IRON‐CONTAINING GLASSES
1.H. W. Gandy and R. J. Ginther, Proc. IRE 50, 2113 (1962).
2.H. W. Gandy, R. J. Ginther, and J. F. Weller, Appl. Phys. Letters 6, 237 (1965).
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5.Even though the manufacturer‐supplied spectral sensitivity data for the S‐l surface photomultiplier covers only the spectral region from 0.3 to 1.2 μ, this PMT has been used to detect stimulated emission signals at a wavelength of 2.08 μ. A detailed correspondence in the spiking patterns from these etalons obtained with both InSb and the S‐l surface PMT detectors using a 2‐mm‐thick germanium filter and a simple beam splitter arrangement was made from many pulse excitations showing that the PMT was responding to the signals. It should be remarked, however, that the peak optical signal strength measured by the PMT was estimated to vary between 10 and 50 W. The sensitivity of the S‐l surface at 2.08 μ is roughly estimated to be about five orders of magnitude less than its peak value at 0.85 μ.
6.W. Low and M. Weger, Phys. Rev. 118, 1130 (1960).
7.H. L. Smith and A. J. Cohen, Physics and Chemistry of Glasses 4, 173 (1963).
8.A. Szabo and R. A. Stein, J. Appl. Phys. 36, 1562 (1965).
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