Table 1 identifies
the serial optical signal at the multimode duplex receptacle when
coupled into a multimode duplex jumper cable. The parameters specified
are based on the requirement that the bit error rate does not exceed
10
-12, including operation at the minimum interface power
level. The use of a
coherent light source, such as a laser
diode, is required.
Note: MCP is only supported at 1.0625 Gbps data rate.
Table 1. Multimode output interface
optical signal
| Parameter |
Unit |
Minimum |
Maximum |
| Average Power to SMF 1 |
dBm |
-9.5 |
-4 |
| Center wavelength 4 |
nm |
|
|
| Spectral width (RMS) 4 |
nm |
|
|
| Rise/Fall time (20-80%) 1,2 |
ps |
|
320 |
| Optical Modulation Amplitude 5 |
mW |
|
0.189 |
| Relative intensity noise (RIN 12) 3 |
dB/Hz |
|
-116 |
Notes:
- Based on any valid 8B/10B code pattern. The length of jumper
cable between the output interface and the instrumentation is 4 meters.
- The minimum frequency response bandwidth range of the optical
waveform detector is 800 kHz to 1 GHz.
- See Relative Intensity Noise (RIN) measurement.
- Spectral width may be increased based on center wavelength and
distance trade-offs. Link budget analysis is required for any such
change. Trade-offs are available between spectral width, central
wavelength, and minimum Optical Modulation Amplitude (OMA). See
Spectral width and center wavelength examples.
- Optical Modulation Amplitude (OMA) is defined in terms of Extinction
Ratio (ER) and optical average power (Pavg), which can be derived
from the equation OMA = 2Pavg ((ER-1)/(ER+1)). The specified OMA
is equivalent to an average power of -9 dBm at ER = 9dB.
|