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Key Features
- Compatible with the QSFP28 MSA as described in SFF-8665
- 100Gb/s over 2 wavelengths on a 50 GHz DWDM grid enabling 4Tb/s over a single fiber
- PAM4 modulation format enabling 56Gb/s on a single wavelength
- 80km reach over a duplex, SMF
- Integrated, high-gain FEC encode / decode
- Advanced ADC/DSP receiver technology
- Optical and host loopback functionality
- Standard CAUI4 electrical interface
- Adaptive equalization (CTLE) on transmit-side electrical input and adjustable output de-emphasis (3 tap FIR filter) to compensate for losses on host
- Typical power consumption of 4.5W
- 2-wire management interface with extended digital diagnostic monitoring and alarm functions
100G PAM4 DWDM Solution Diagram
Transmitter Optical Characteristics
Parameter | Comment | Min | Typ | Max | Unit |
Signaling Rate, each lane | Rate=25.78913Gb/s+FEC OH(~9%)*2(PAM4) | Typ
-100 ppm |
56.25 | Typ
+100 ppm |
Gb/s |
Wavelength | Check the wavelength table | nm | |||
Frequency Control | Frequency control loop used to optimize link performance. Mix/max limits indicate control loop range. | λc – 12 | N/A | λc + 12 | GHz |
Center Wavelength Spacing | Wavelength/lane 1-2 spacing | N/A | 50 | N/A | GHz |
Extinction Ratio | N/A | 6 | N/A | dB | |
SMSR | 30 | N/A | N/A | dB | |
Average Launch Power, per lane | -11 | -10 | -8 | dBm | |
Dispersion Tolerance | Residual dispersion (RD) after DCM | -100 | N/A | +100 | ps/nm |
Average Launch Power of OFF
Transmitter, each lane |
N/A | N/A | -30 | dBm | |
Optical Return Loss Tolerance | N/A | N/A | 20 | dB | |
Transmitter Reflectance | Defined looking into the transmitter | N/A | N/A | -12 | dB |
Receiver Optical Characteristics
Parameter | Comment | Min | Typ | Max | Unit |
Signaling Rate, each lane | Rate=25.78913Gb/s+FEC OH(~9%)*2(PAM4) | Typ
-100 ppm |
56.25 | Typ
+100 ppm |
Gb/s |
Wavelength | Check the wavelength table | nm | |||
Damage Threshold | Frequency control loop used to optimize link performance. Mix/max limits indicate control loop range. | 10 | N/A | N/A | dBm |
Receiver Power, each lane | -2.0 | N/A | 6.0 | dBm | |
Receiver Reflectance | N/A | N/A | -20 | dB | |
Required OSNR | 31 | N/A | N/A | dB | |
LOSS asserted threshold-OMA | -10 | N/A | N/A | dBm | |
LOSS de-asserted threshold-OMA | N/A | N/A | -3 | dBm | |
LOS Hysteresis | N/A | 1.0 | N/A | dB |
Notes:
1, The receiver shall be able to tolerate, without damage, continuous exposure to an optical input signal below this average power level
2, Module receiver LOS characteristics are realized by monitoring the DC current of the high-speed photodiodes. Preliminary LOS threshold limits are shown in the table
Wavelength Selection Table
Channel No. | 100GHz Grid | Channel No. | 100GHz Grid |
D20 | 192.00 | D40 | 194.00 |
D21 | 192.10 | D41 | 194.10 |
D22 | 192.20 | D42 | 194.20 |
D23 | 192.30 | D43 | 194.30 |
D24 | 192.40 | D44 | 194.40 |
D25 | 192.50 | D45 | 194.50 |
D26 | 192.60 | D46 | 194.60 |
D27 | 192.70 | D47 | 194.70 |
D28 | 192.80 | D48 | 194.80 |
D29 | 192.90 | D49 | 194.90 |
D30 | 193.00 | D50 | 195.00 |
D31 | 193.10 | D51 | 195.10 |
D32 | 193.20 | D52 | 195.20 |
D33 | 193.30 | D53 | 195.30 |
D34 | 193.40 | D54 | 195.40 |
D35 | 193.50 | D55 | 195.50 |
D36 | 193.60 | D56 | 195.60 |
D37 | 193.70 | D57 | 195.70 |
D38 | 193.80 | D58 | 195.80 |
D39 | 193.90 | D59 | 195.90 |