Table 1 defines 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.
Table 1. SX 50/125 μm and 62.5/125 μm multimode output interface optical signal
| Parameter |
Unit |
100-M5-SN-I (1.0625 Gbps) |
200-M5-SN-I (2.125 Gbps) |
400-M5-SN-I (4.250
Gbps) |
800-M5-SN-S (8.500 Gbps) |
1600-M5-SN-I (14.025 Gbps) |
3200-M5-SN-I (28.05 Gbps) |
| Average power, maximum1 |
dBm |
|
|
|
|
|
|
| Average power, minimum 2 |
dBm |
-10 |
-10 |
-9 |
-8.2 |
-7.8 |
-6.2 |
| Center wavelength, minimum 3 |
nm |
770 |
830 |
830 |
840 |
840 |
840 |
| Center wavelength, maximum |
nm |
860 |
860 |
860 |
860 |
860 |
860 |
| RMS spectral width, maximum |
nm |
1.0 |
0.85 |
0.85 |
0.65 |
.59 |
.57 |
| Rise/Fall Time (20-80%), maximum 4 |
ps |
300 |
150 |
90 |
Note7
|
Note7 |
Note7 |
| Optical Modulation Amplitude (OMA), maximum 5 |
mW |
0.156 |
0.196 |
0.247 |
0.302 |
0.331 |
0.479 |
| Relative intensity noise (RIN 12) 6 |
dB/Hz |
-116 |
-117 |
-118 |
-128 |
-128 |
-129 |
Notes:
- Lesser of class 1 laser safety limits (CDRH and EN 60825) or receiver power, maximum.
- Based on any valid 8B/10B code pattern. The minimum length of a SM jumper cable between the
output interface and the instrumentation is 2 meters.
- If using the higher bandwidth cable option of 2000 MHz•km in (see ANSI FC-PI-2), the
center wavelength minimum is further restricted to 840 nm.
- Optical rise and fall time specifications are based on the unfiltered waveforms. For the purpose
of standardizing the measurement method, measured waveforms shall conform to the Transmitter Eye
Diagram Mask as defined in ANSI FC-PI-2. If a filter is needed to conform to the mask, the filter
response effect should be removed from the measured rise and fall times using the equation:
TRISE/FALL = [(TRISE/FALL_MEASURED)2 –
(TRISE/FALL_FILTER)2]1/2
The optical signal may have different rise and fall times. Any filter should have an impulse
response equivalent to a fourth order Bessel-Thomson Filter. See the ANSI FC-PI-2
standard.
- Optical Modulation Amplitude (OMA) values are peak-to-peak. 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 at 1.0625 Gbps is equivalent to an average power of -9 dBm
at ER = 9.
- See Test methods.
- Transmitter deterministic performance is controlled by TWDP.
|