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TRANSMISSION OF GREEN LASER LIGHT (5300A) THROUGH WATER,
NAVAL ORDNANCE LAB WHITE OAK MD
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The extinction coefficient of filtered Potomac River water was measured at the frequency doubled neodymium green laser wavelength of 5300A. Measurements were conducted in situ at the David Taylor Model Basin DTMB in a cooperative program with the Naval Research Laboratory NRL. Extinction coefficients of 0.097, 0.104 and 0.119m were measured on 4, 5 and 8 June 1964, respectively. The increase in attenuation with time is confirmed by filtered arc light measurements made by the NRL and is attributed to contamination of the water after the basin filtration system was turned off. Scattering experiments indicate that the aureole effect for the highly collimated laser beam was small over the 200 meter range of the measurements. Author
APPROVED FOR PUBLIC RELEASE