Patent classifications
H
ELECTRICITY
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H04
ELECTRIC COMMUNICATION TECHNIQUE
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H04B
TRANSMISSION
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10/00
Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
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H04B10/66
Non-coherent receivers, e.g. using direct detection
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H04B10/67
Optical arrangements in the receiver
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H04B10/671
for controlling the input optical signal
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H04B10/672
for controlling the power of the input optical signal
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