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C1648M (4/05) 29
OPTICAL POWER BUDGET, TRANSMISSION DISTANCE, AND LASER CLASS 1 LIMIT
Fiber Wavelength
Optical
Power
Budget
Maximum
Transmission
Distance
Laser
Class 1
Limit*
Multimode
(62.5/125 µm)
1310 nm (video)
20 dB
†
1 km (0.6 mi)
††
<15.6 mW
850 nm (data)
20 dB
†
1 km (0.6 mi)
††
<0.78 mW
Single-mode
(9/125 µm)
1310 nm (video) 20 dB
30 km (18.6 mi)
§
<15.6 mW
1550 nm (data) 20 dB
30 km (18.6 mi)
§
<10.0 mW
*The FT85081 transmitter/FR85081 receiver is classified by the FDA as a Class 1 laser product.
†
When using 50/125 µm fiber, subtract 3 dB from the optical power budget.
††
Maximum transmission distance is limited by fiber bandwidth.
§
Maximum transmission distance is based on attenuation of 0.5 dB/km plus a 5 dB buffer for
connector and splice losses.