The 400G QSFP-DD FR4 optical module is a high-performance optical communication solution targeted at high-speed data centers, cloud computing, and 5G networks. Based on the QSFP-DD (Quad Small Form Factor Pluggable Double Density) packaging standard, this module supports the 4×100G PAM4 modulation technique and enables 400Gbps Ethernet transmission over single-mode fiber (SMF). It has a maximum transmission distance of up to 2 kilometers (in compliance with the IEEE 802.3bs FR4 standard), fulfilling the requirements for network deployments with high bandwidth, low latency, and high density.
Performance Specifications – Optical
|
Parameter |
Symbol |
Min |
Typ. |
Max |
Unit |
|
Transmitter |
|||||
|
Centre Wavelength |
λC0 |
|
1271 |
|
nm |
|
λC1 |
|
1291 |
|
||
|
λC2 |
|
1311 |
|
||
|
λC3 |
|
1331 |
|
||
|
Transmitter Signal Rate |
|
|
53.125 |
|
Gbd PAM4 |
|
SMSR |
|
30 |
|
|
dB |
|
Total average launch power |
Pmax |
|
|
10.2 |
dBm |
|
Average launch power, each lane |
Pout |
–3.2 |
|
4.4 |
dBm |
|
Outer OMA, each lane |
OMAouter |
|
|
3.7 |
dBm |
|
Outer Optical Modulation Amplitude (OMAouter) each lane: for TDECQ <1.4dB for 1.4≤TDECQ≤3.4dB |
Toma |
-0.2 -1.6+TDECQ |
|
|
|
|
Difference in launch power between any two lanes (OMAouter) |
DP |
|
|
3.9 |
dB |
|
Transmitter and dispersion eye closure for PAM4 |
TDECQ |
|
|
3.4 |
dB |
|
Transmitter eye closure for PAM4(TECQ) |
TECQ |
|
|
3.4 |
dB |
|
Over/under-shoot |
|
|
|
22 |
% |
|
Transmitter power excursion |
|
|
|
1.8 |
dBm |
|
Optical Return Loss Tolerance |
TOL |
|
|
17.1 |
dB |
|
Average POUT (Laser Turn off) |
Poff |
|
- |
-16. |
dBm |
|
Extinction Ratio |
ER |
3.5 |
- |
- |
dB |
|
Transmitter transition time |
|
|
|
17 |
ps |
|
RIN17.1OMA |
RIN |
|
|
-136 |
dB/Hz |
|
Transmitter Reflectance |
Tr |
|
|
-26 |
dB |
|
Parameter |
Symbol |
Min |
Typ. |
Max |
Unit |
|
Receiver |
|||||
| Centre Wavelength |
λC0 |
|
1271 |
|
nm |
|
λC1 |
|
1291 |
|
||
|
λC2 |
|
1311 |
|
||
|
λC3 |
|
1331 |
|
||
|
Modulation format |
|
|
PAM4 |
|
|
|
Damage threshold, each lane |
Pd |
5.4 |
|
|
dBm |
|
Average receive power, each lane |
Pa |
-7.2 |
- |
4.4 |
dBm |
|
Receive power (OMAouter), each lane |
RXoma |
- |
- |
3.7 |
dBm |
|
Difference in receive power between any two lanes (OMAouter) |
DR |
|
- |
4.1 |
dB |
|
Receiver Reflectance |
|
|
|
-26 |
dBm |
|
Receiver Sensitivity (OMAouter), each lane for TECQ <1.4dB for 1.4≤TECQ≤3.4dB |
SOMA |
|
|
-4.6 -6+TECQ |
dBm |
|
Stressed eye closure for PAM4 (SECQ) |
|
|
|
3.4 |
dB |
|
OMAouter of each aggressor lane |
|
|
|
1.4 |
dBm |
