Optical Attenuator
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If used in fiber optic communications optical attenuator employs several principles. The gap loss principle is one common principle. Attenuators that are using this principle are quite sensitive to the modal distribution ahead of the attenuator. So, it is important that they are utilized at or near the transmitting end. Less loss could be established by the attenuators. If attenuators use absorptive or reflective principles then this problem is somehow avoided.
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Optical Attenuator
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