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What is the maximum distance that a fiber optic modem can go?

April 26, 2017distance fiber maximum modem optic

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What is the maximum distance that a fiber optic modem can go?

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The maximum distance a modem can go is the difference between receiver sensitivity and transmit power of the fiber optic modems (which can both be found on OSD data sheets) divided by the transmission loss of the fiber used. For example, a basic singlemode OSD815 digital video system’s transmitter power is greater than -10dBm and its receiver sensitivity is better than -29dBm so the difference of 19dB at 1310nm allows operation over at least 45km. Note this would be very poor design because there is no allowance for a link margin.