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Procedure, circuit and apparatus for reducing the effects of wavelength-dependent transmission characteristics in optical atmospheric transmission
Procedure, circuit and apparatus for reducing the effects of wavelength-dependent transmission characteristics in optical atmospheric transmission
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机译：减少光学大气传输中与波长有关的传输特性的影响的程序，电路和装置
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摘要
A method, circuit, and apparatus for mitigating effects of wavelength-dependent atmospheric transmission characteristics on an atmospheric optical telecommunication system. The system comprises two atmospheric optical telecommunication units (181, 182) communicating with one another using light propagated through the atmosphere. Each of the atmospheric telecommunication units (181, 182) includes an optical transmitter having a laser generating a transmitted light beam for reception by the other, and an optical receiver. The optical receiver generates an electrical signal in response to a received light beam received from the other of the atmospheric optical telecommunication units (181, 182). In the method, an increase in noise above a normal noise level is detected in the electrical signal, and a flag signal is generated in response. The increase in noise is due to the received light beam having a wavelength at which the atmosphere has a wavelength-dependent transmission characteristic. In response to the flag signal, the wavelength of the transmitted light beam is changed to a wavelength at which the transmission characteristic of the atmosphere is less wavelength- dependent. IMAGE
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