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40GBASE - LR4 SFP Optical Transceiver Module Single Mode Fiber 4 CWDM Lanes

Categories SFP Optical Transceiver Module
Brand Name: E-link China
Model Number: LNK-QSFP-LR
Certification: CE, RoHS, FCC
Place of Origin: Shenzhen, China
MOQ: 1 piece
Payment Terms: T/T, Western Union, MoneyGram, Paypal
Supply Ability: 1000000000pcs/Month
Delivery Time: 3-5 working days
Packaging Details: 10 piece in 1 carton box
CWDM: Support
1.1Gbps Data rate: Support
Fiber Type: Single mode
Power dissipation: < 3.5 W
operating temperature: 0°C to 70°C
Distance: 10km
Price: Negotiation
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40GBASE - LR4 SFP Optical Transceiver Module Single Mode Fiber 4 CWDM Lanes

40GBASE-LR4 4 CWDM lanes 1310 nm SMF 10km SFP Optical Transceiver Module


  • 4 CWDM lanes Mux/Demux design
  • Up to 11.1Gbps Data rate per wavelength
  • Up to 10km transmission on SMF
  • Electrically hot-pluggable
  • Digital Diagnostics Monitoring Interface
  • Compliant with QSFP+ MSA with LC connector
  • Case operating temperature range:0°C to 70°C
  • Power dissipation < 3.5 W


  • 40G Ethernet
  • Data Center and LAN


  • Compliant to IEEE 802.3ba
  • Compliant to SFF-8436
  • RoHS Compliant.

General Description

E-LINK QSFP+ LR4 is designed to operate over single-mode fiber system using 4X10 CWDM channel in 1310 band and links up to 10km. The module converts 4 inputs channel 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. It contains a duplex LC connector for the optical interface and a 38-pin connector for the electrical interface. Single-mode fiber (SMF) is applied in this module. This product converts the 4-channel 10Gb/s electrical input data into CWDM optical signals (light), by a 4-wavelength Distributed Feedback Laser (DFB) array. The 4 wavelengths are multiplexed into a single 40Gb/s data, propagating out of the transmitter module via the SMF. The receiver module accepts the 40Gb/s optical signals input, and de-multiplexes it into 4 CWDM 10Gb/s channels. Each wavelength light is collected by a discrete photo diode, and then outputted as electric data after amplified by a TIA.

The product is designed with form factor, optical/electrical connection and digital diagnostic interface according to the QSFP+ Multi-Source Agreement (MSA) and compliant to 40G QSFP+ LR4 of IEEE 802.3ba.

Absolute Maximum Ratings

Storage TemperatureTs-40-85ºC
Relative HumidityRH5-95%
Power Supply VoltageVCC-0.3-4V
Signal Input VoltageVcc-0.3-Vcc+0.3V

Recommended Operating Conditions

Case Operating TemperatureTcase0-70ºCWithout air flow
Power Supply VoltageVCC3.133.33.47V
Power Supply CurrentICC-900mA
Data RateBR10.3125GbpsEach channel
Transmission DistanceTD-10km
Coupled fiberSingle mode fiber9/125um SMF

Optical Characteristics

Wavelength Assignmentλ01264.512711277.5nm
Total Output. PowerPOUT8.3dBm
Average Launch Power Per lane-72.3dBm
Spectral Width (-20dB)σ1nm
Optical Extinction RatioER3.5dB
Average launch Power off per lanePoff-30dBm
Transmitter and Dispersion PeanltyTDP2.3dB
Output Eye MaskCompliant with IEEE 802.3ba
Rx Sensitivity per lane(OMA)RSENS-11.5dBm1
Input Saturation Power (Overload)Psat3.3dBm
Receiver ReflectanceRr-26dB


  1. Measured with a PRBS 231-1 test pattern, @10.325Gb/s, BER<10-12 .
    1. Electrical Characteristics
Supply VoltageVcc3.143.33.46V
Supply CurrentIcc900mA
Input differential impedanceRin100Ω1
Differential data input swingVin,pp1801000mV
Transmit Disable VoltageVDVcc–1.3VccV
Transmit Enable VoltageVENVeeVee+ 0.8V2
Transmit Disable Assert Time10us
Differential data output swingVout,pp300850mV3
Data output rise timetr28ps4
Data output fall timetf28ps4
LOS FaultVLOS faultVcc–1.3VccHOSTV5
LOS NormalVLOS normVeeVee+0.8V5
Power Supply RejectionPSR100mVpp6


  1. Connected directly to TX data input pins. AC coupled thereafter.
  2. Or open circuit.
  3. Into 100 ohms differential termination.
  4. 20 – 80 %.
  5. Loss Of Signal is LVTTL. Logic 0 indicates normal operation; logic 1 indicates no signal detected.
  6. Receiver sensitivity is compliant with power supply sinusoidal modulation of 20 Hz to 1.5 MHz up to specified value applied through the recommended power supply filtering network.

Figure 1---Pin out of Connector Block on Host Board

1GNDTransmitter Ground (Common with Receiver Ground)1
2Tx2nTransmitter Inverted Data Input
3Tx2pTransmitter Non-Inverted Data output
4GNDTransmitter Ground (Common with Receiver Ground)1
5Tx4nTransmitter Inverted Data Input
6Tx4pTransmitter Non-Inverted Data output
7GNDTransmitter Ground (Common with Receiver Ground)1
8ModSelLModule Select
9ResetLModule Reset
10VccRx3.3V Power Supply Receiver2
11SCL2-Wire serial Interface Clock
12SDA2-Wire serial Interface Data
13GNDTransmitter Ground (Common with Receiver Ground)
14Rx3pReceiver Non-Inverted Data Output
15Rx3nReceiver Inverted Data Output
16GNDTransmitter Ground (Common with Receiver Ground)1
17Rx1pReceiver Non-Inverted Data Output
18Rx1nReceiver Inverted Data Output
19GNDTransmitter Ground (Common with Receiver Ground)1
20GNDTransmitter Ground (Common with Receiver Ground)1
21Rx2nReceiver Inverted Data Output
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