レーザ光 (6328Å) の大気伝播による偏光変動の測定について(第 2 報)

概要

論文の詳細を見る
When a laser beam is transmitted through the atmosphere, it suffers random variations in intensity (scintillation), direction (quivering), phase, and polarization due to the fluctuations of the atmosphere's refractive index caused by wind and thermal turbulence. The possibility that optical effects associated. with fluctuations in the refractive index of the atmosphere include polarization effects has generally been discounted as negligible. With the increasing interest in optical communications, and the suggestion of using "polarization pulse-code modulation system" and the "dual polarization transmission system", to avoid atmosphere produced modulation noise and crosstalk, it appears reasonable to examine the situation experimentally. We therefore designed an experiment to seek this effect in horizontal propagation of linearly polarized laser light over a 142meters path, in fact, did find a significant degree of polarization fluctuation associated with intensity fluctuation. With the aid of Heterodyne Detection Measurement, we detected orthogonal component of linearly polarized light.
1973-03-31