Optical Interface Port - ADTRAN OCU 45 Manual

Chapter 2. Installation

OPTICAL INTERFACE PORT

The OCU 45 optical interface port consists of a single-mode, long-haul or
multi-mode, short-haul transceiver module comprised of a transmitter and
receiver. The optical interface port supports angled or straight SC or ST type
optical connectors and operates in the 1280 nm to 1335 nm wavelength range
(1310 nm nominal). The total output power is 8 mW with a 50 mm aperture
at 10 cm distance, as defined by IEC. The optical interface uses two fibers,
one for each direction of transmission. The long-range optical budget for the
optical transceiver (single-mode) is 28 dB, calculated as follows:
Worst case optical transmit power
Worst case optical receiver sensitivity
Calculations:
(34 - 5) dB = 29 dB - 1 dB (optical path penalty) = 28 dB
For the multi-mode optical transceiver, the short-range optical budget is
14 dB and can be calculated using the following equations:
Worst case optical transmit power
Worst case optical receiver sensitivity
Calculations:
(31 - 16) dB = 15 dB - 1 dB (optical path penalty) = 14 dB
The optical interface complies with IEC Class 1 laser safety requirements
(under normal operating conditions). The OCU 45 contains an integrated
automatic shutdown circuit that disables the laser when it detects transmitter
failures giving it an FDA Class 1 laser safety rating. The FITS rating of the
internal shutdown circuit is less than 500 FITS.
A removable process plug to cover the optical interface is provided with the
OCU 45 unit.
26 OCU 45 User Manual
= -5 dBm
= -34 dBm
= -16 dBm
= -31 dBm
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