40KM 40G QSFP+ Optical Transceiver Module

 

The HUAQ40E is a transceiver module designed for 40Km optical communication applications. The design is compliant to 40GBASE-ER4 of the IEEE P802.3ba standard. The module converts 4 inputs channels(ch) of 10Gb/s electrical data to 4 CWDM optical signals, and multiplexes them into a  single channel for 40Gb/s optical transmission. Reversely, on the receiver side, the module optically de-multiplexes a 40Gb/s input into 4 CWDM channels signals, and converts them to 4 channel  output electrical data.

The central wavelengths of the 4 CWDM channels are 1271, 1291, 1311 and 1331 nm as members of the CWDM wavelength grid defined in ITU-T G694.2. It contains a duplex LC connector for the optical interface and a 38-pin connector for the electrical interface. To minimize the optical dispersion in the long-haul system, single-mode fiber (SMF) has to be applied in this module.

The product is designed with form factor, optical/electrical connection and digital diagnostic  interface according to the QSFP Multi-Source Agreement (MSA). It has been designed to meet the harshest external operating conditions including temperature, humidity and EMIinterference.

The module operates from a single +3.3V power supply and LVCMOS/LVTTL global  control signals such as Module Present, Reset, Interrupt and Low Power Mode are available with the modules. A 2-wire serial interface is available to send and receive more complex control signals and to obtain digital diagnostic information. Individual channels can be addressed and unused channels  can be shut down for maximum design flexibility.

 

This product converts the 4-channel 10Gb/s electrical input data into CWDM optical signals (light), by a driven 4-wavelength Distributed Feedback Laser (DFB) array. The light is combined by the MUX parts as a 40Gb/s data, propagating out of the transmitter module from the SMF. The receiver module accepts the 40Gb/s CWDM optical signals input, and de-multiplexes it into 4 individual 10Gb/s channels with different wavelength. Each wavelength light is collected by a discrete avalanche photodiode (APD), and then outputted as electric data after amplified first by a TIA and then by a post amplifier.

 

The HUAQ40E is designed with form factor, optical/electrical connection and digital diagnostic interface according to the QSFP Multi-Source Agreement (MSA). It has been designed to meet the harshest external operating conditions including temperature, humidity and EMI interference. The module offers very high functionality and feature integration, accessible via a two-wire serial interface.

 

 

 

Features

4 CWDM lanes MUX/DEMUX design

Up to 11.2Gbps per channel bandwidth

Aggregate bandwidth of > 40Gbps

Duplex LC connector

Compliant with 40G Ethernet IEEE802.3ba and 40GBASE-ER4 Standard

QSFP MSA compliant

Up to 40km transmission

Compliant with QDR/DDR Infiniband data rates

Single +3.3V power supply operating

Built-in digital diagnostic functions

Temperature range 0°Cto 70°C

RoHS Compliant

Optical Characteristics (TOP = 0 to 70°C, VCC = 3.135 to 3.465 Volts)

Parameter Symbol Min Typ Max Unit Ref.
Transmitter
  Wavelength Assignment L0 1264.5 1271 1277.5 nm
L1 1284.5 1291 1297.5 nm
L2 1304.5 1311 1317.5 nm
L3 1324.5 1331 1337.5 nm
Side-mode Suppression Ratio SMSR 30 - - dB
Total Average Launch Power PT - - +10.5 dBm
Average Launch Power, each Lane -2.7 - +4.5 dBm
Difference in Launch Power between any two Lanes (OMA) - - 6.5 dB
Optical Modulation Amplitude, each Lane OMA -0.7 +5 dBm
Launch Power in OMA minusTransmitter and Dispersion Penalty (TDP), each Lane  -1.5  -  dBm
TDP, each Lane TDP 2.6 dB
Extinction Ratio ER 5.5 - - dB
 Transmitter Eye Mask Definition {X1, X2, X3, Y1, Y2, Y3} {0.25,0.4, 0.45,0.25,0.28, 0.4}
Optical Return Loss Tolerance - - 20 dB
Average Launch Power OFF Transmitter, each Lane Poff -30 dBm
Relative Intensity Noise Rin -128 dB/H Z 1
Receiver
Damage Threshold THd -6 dBm 1

 

 

Average Power at Receiver Input, each Lane R

-21.2

-4.5 dBm
Receiver Power (OMA), each Lane -4 dB
RSSI Accuracy -2 2 dB
Receiver Reflectance Rrx -26 dB
Stressed Receiver Sensitivity in OMA, each Lane - - -16.8 dBm
Receiver Sensitivity(OMA), each Lane Sen - - -19 dBm
Difference in Receive Power between any two Lanes (OMA) 7.5 dB
Receive Electrical 3 dB upper Cutoff Frequency, each Lane 12.3 GHz
LOS De-Assert LOSD -22 dBm
LOS Assert LOSA -35 dBm
LOS Hysteresis LOSH

0.5

dB

Note

  1. 12dB Reflection

 Applications

Rack to rack

Data centers Switches and Routers

Metro networks

Switches and Routers

40G BASE-ER4 Ethernet Links