Since 1995

Fiber Solutions

Fiber Optic Manufacturer

China Factory.

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Specialized Fiber Optic Products Manufacturer Since 1995. Professional Data Center Fiber Solutions from Huihong Technologies.

Since 1995

Fiber Solutions

Fiber Optic Manufacturer

China Factory.

Send Enquiry Now

DWDM 10G SFP 40km

DWDM SFP-10G-40km-Dxx is a very compact 10Gb/s optical transceiver module for serial optical communication applications at 10Gb/s. The DWDM SFP-10G-40km-Dxx converts a 10Gb/s serial electrical data stream to 10Gb/s optical output signal and a 10Gb/s optical input signal to 10Gb/s serial electrical data streams. The high speed 10Gb/s electrical interface is fully compliant with SFI specification. The high performance DWDM EML transmitter and high sensitivity PIN receiver provide superior performance for Ethernet applications at up to 40km links. The Huihongfiber DWDM SFP-10G-40km-Dxx Module complies with SFF-8431, SFF-8432 and IEEE 802.3ae 10GBASE-ER. Digital diagnostics functions are available via a 2-wire serial interface, as specified in SFF-8472. The fully SFP compliant form factor provides hot pluggability, easy optical port upgrades and low EMI emission.

DWDM 10G SFP 40km Features:

Supports 9.95 to 11.3Gb/s bit rates
Duplex LC connector
100GHz ITU Grid, C Band
DWDM EML transmitter, PIN photo-detector
SMF links up to 40km
2-wire interface for management specifications compliant with SFF 8472 digital diagnostic monitoring interface
Power Supply :+3.3V
Power consumption <1.8W
Temperature Range: 0~ 70°C
RoHS compliant

DWDM 10G SFP 40km Applications:

10GBASE-ER/EW Ethernet
Sonet OC-192/SDH
10G Fibre channel
DWDM Networks

  • Absolute Maximum Ratings
Parameter Symbol Min. Typical Max. Unit
Storage Temperature TS -40 +85 °C
Case Operating Temperature TA 0 70 °C
Maximum Supply Voltage Vcc -0.5 4 V
Relative Humidity RH 0 85 %
  • Electrical Characteristics (TOP = 0 to 70 °C, VCC = 3.135 to 3.465 Volts)
Parameter Symbol Min. Typical Max. Unit Note
Supply Voltage Vcc 3.135 3.465 V
Supply Current Icc 500 mA
Power Consumption P 1.8 W
Transmitter Section:
Input differential impedance Rin 100 Ω 1
Tx Input Single Ended DC Voltage Tolerance (Ref VeeT) V -0.3 4 V
Differential input voltage swing Vin,pp 180 700 mV 2
Transmit Disable Voltage VD 2 Vcc V 3
Transmit Enable Voltage VEN Vee Vee+0.8 V
Receiver Section:
Single Ended Output Voltage Tolerance V -0.3 4 V
Rx Output Diff Voltage Vo 300 850 mV
Rx Output Rise and Fall Time Tr/Tf 30 ps 4
LOS Fault VLOS fault 2 VccHOST V 5
LOS Normal VLOS norm Vee Vee+0.8 V 5


  1. Connected directly to TX data input pins. AC coupling from pins into laser driver IC.
  2. Per SFF-8431 Rev 3.0
  3. Into 100 ohms differential termination.
  4. 20%~80%
  5. LOS is an open collector output. Should be pulled up with 4.7k – 10kΩ on the host board. Normal operation is logic 0; loss of signal is logic 1. Maximum pull-up voltage is 5.5V.
  • Optical Parameters(TOP = 0 to 70°C, VCC = 3.135 to 3.465 Volts)
Parameter Symbol Min. Typical Max. Unit Note
Transmitter Section:
Optical Wavelength-End Of Life λ X-100 X X+100 pm
Optical Wavelength-Beginning Of Life λ X-25 X X+25 pm
Average Optical Power Pavg -1 +4 dBm 1
Laser Off Power Poff -30 dBm
Extinction Ratio ER 8.2 dB
Transmitter Dispersion Penalty TDP 3.0 dB 2
Relative Intensity Noise Rin -128 dB/Hz 3
Optical Return Loss Tolerance 20 dB
Receiver Section:
Center Wavelength λr 1480 1580 nm
Receiver Sensitivity Sen -16 dBm 4
Stressed Sensitivity (OMA) SenST -14.5 dBm 4
Los Assert LOSA -27 dBm
Los Dessert LOSD -17 dBm
Los Hysteresis LOSH 0.5 dB
Overload Sat 0 dBm 5
Receiver Reflectance Rrx -12 dB


  1. Average power figures are informative only, per IEEE802.3ae.
  2. TWDP figure requires the host board to be SFF-8431compliant. TWDP is calculated using the Matlab code provided in clause of IEEE802.3ae.
  3. 12dB reflection.
  4. Conditions of stressed receiver tests per IEEE802.3ae. CSRS testing requires the host board to be SFF-8431 compliant.
  5. Receiver overload specified in OMA and under the worst comprehensive stressed condition.
  • Timing Characteristics
Parameter Symbol Min. Typical Max. Unit
TX_Disable Assert Time t_off 10 us
TX_Disable Negate Time t_on 1 ms
Time to Initialize Include Reset of TX_FAULT t_int 300 ms
TX_FAULT from Fault to Assertion t_fault 100 us
TX_Disable Time to Start Reset t_reset 10 us
Receiver Loss of Signal Assert Time TA,RX_LOS 100 us
Receiver Loss of Signal Deassert Time Td,RX_LOS 100 us
Rate-Select Chage Time t_ratesel 10 us
Serial ID Clock Time t_serial-clock 100 kHz


  • Pin Assignment

Diagram of Host Board Connector Block Pin Numbers and Name

  • Pin Function Definitions
PIN # Name Function Notes
1 VeeT Module transmitter ground 1
2 Tx Fault Module transmitter fault 2
3 Tx Disable Transmitter Disable; Turns off transmitter laser output 3
4 SDL 2 wire serial interface data input/output (SDA)
5 SCL 2 wire serial interface clock input (SCL)
6 MOD-ABS Module Absent, connect to VeeR or VeeT in the module 2
7 RS0 Rate select0, optionally control SFP+ receiver. When high, input data rate >4.5Gb/ s; when low, input data rate <=4.5Gb/s
8 LOS Receiver Loss of Signal Indication 4
9 RS1 Rate select0, optionally control SFP+ transmitter. When high, input data rate >4.5Gb/s; when low, input data rate <=4.5Gb/s
10 VeeR Module receiver ground 1
11 VeeR Module receiver ground 1
12 RD- Receiver inverted data out put
13 RD+ Receiver non-inverted data out put
14 VeeR Module receiver ground 1
15 VccR Module receiver 3.3V supply
16 VccT Module transmitter 3.3V supply
17 VeeT Module transmitter ground 1
18 TD+ Transmitter inverted data out put
19 TD- Transmitter non-inverted data out put
20 VeeT Module transmitter ground 1


  1. The module ground pins shall be isolated from the module case.
  2. This pin is an open collector/drain output pin and shall be pulled up with 4.7K-10Kohms to Host_Vcc on the host board.
  3. This pin shall be pulled up with 4.7K-10Kohms to VccT in the module.
  4. This pin is an open collector/drain output pin and shall be pulled up with 4.7K-10Kohms to Host_Vcc on the host board.
    • SFP Module EEPROM Information and Management

The SFP modules implement the 2-wire serial communication protocol as defined in the SFP -8472. The serial ID information of the SFP modules and Digital Diagnostic Monitor parameters can be accessed through the I2C interface at address A0h and A2h. The memory is mapped in Table 1. Detailed ID information (A0h) is listed in Table 2. And the DDM specification at address A2h. For more details of the memory map and byte definitions, please refer to the SFF-8472, “Digital Diagnostic Monitoring Interface for Optical Transceivers”. The DDM parameters have been internally calibrated.

Table 1. Digital Diagnostic Memory Map (Specific Data Field Descriptions)
Table 2 – EEPROM Serial ID Memory Contents (A0h)

Data Address Length


Name of


Description and Contents
Base ID Fields
0 1 Identifier Type of Serial transceiver (03h=SFP)
1 1 Reserved Extended identifier of type serial transceiver (04h)
2 1 Connector Code of optical connector type (07=LC)
3-10 8 Transceiver 10G Base-ER
11 1 Encoding 64B/66B
12 1 BR, Nominal Nominal baud rate, unit of 100Mbps
13-14 2 Reserved (0000h)
15 1 Length(9um) Link length supported for 9/125um fiber, units of 100m
16 1 Length(50um) Link length supported for 50/125um fiber, units of 10m
17 1 Length(62.5um) Link length supported for 62.5/125um fiber, units of 10m
18 1 Length(Copper) Link length supported for copper, units of meters
19 1 Reserved
20-35 16 Vendor Name SFP vendor name: Huihongfiber
36 1 Reserved
37-39 3 Vendor OUI SFP transceiver vendor OUI ID
40-55 16 Vendor PN Part Number: “DWDM 10G SFP 40km” (ASCII)
56-59 4 Vendor rev Revision level for part number
60-62 3 Reserved
63 1 CCID Least significant byte of sum of data in address 0-62
Extended ID Fields
64-65 2 Option Indicates which optical SFP signals are implemented

(001Ah = LOS, TX_FAULT, TX_DISABLE all supported)

66 1 BR, max Upper bit rate margin, units of %
67 1 BR, min Lower bit rate margin, units of %
68-83 16 Vendor SN Serial number (ASCII)
84-91 8 Date code Huihongfiber’s Manufacturing date code
92-94 3 Reserved
95 1 CCEX Check code for the extended ID Fields (addresses 64 to 94)
Vendor Specific ID Fields
96-127 32 Readable Huihongfiber specific date, read only
128-255 128 Reserved Reserved for SFF-8079
  • Digital Diagnostic Monitor Characteristics
Data Address Parameter Accuracy Unit
96-97 Transceiver Internal Temperature ±3.0 °C
100-101 Laser Bias Current ±10 %
100-101 Tx Output Power ±3.0 dBm
100-101 Rx Input Power ±3.0 dBm
100-101 VCC3 Internal Supply Voltage ±3.0 %
  • Regulatory Compliance

The DWDM 10G SFP 40km complies with international Electromagnetic Compatibility (EMC) and international safety requirements and standards (see details in Table following).

Electrostatic Discharge

(ESD) to the Electrical Pins


Method 3015.7

Class 1(>1000 V)
Electrostatic Discharge (ESD)

to the Duplex LC Receptacle

IEC 61000-4-2


Compatible with standards

Interference (EMI)

FCC Part 15 Class B

EN55022 Class B (CISPR 22B)

VCCI Class B

Compatible with standards
Laser Eye Safety FDA 21CFR 1040.10 and 1040.11

EN60950, EN (IEC) 60825-1,2

Compatible with Class 1 laser


  • Order Information:

DWDM 10G SFP 40km                 XX: 100GHZ ITU Grid Wavelength

Part No. Central Wavelength(nm) Frequency (THZ)
DWDM-SFP-10G40KM-D61 1528.77 196.1
DWDM-SFP-10G40KM-D60 1529.55 196.0
DWDM-SFP-10G40KM-D59 1530.33 195.9
DWDM-SFP-10G40KM-D58 1531.12 195.8
DWDM-SFP-10G40KM-D57 1531.90 195.7
DWDM-SFP-10G40KM-D56 1532.68 195.6
DWDM-SFP-10G40KM-D55 1533.47 195.5
DWDM-SFP-10G40KM-D54 1534.25 195.4
DWDM-SFP-10G40KM-D53 1535.04 195.3
DWDM-SFP-10G40KM-D52 1535.82 195.2
DWDM-SFP-10G40KM-D51 1536.61 195.1
DWDM-SFP-10G40KM-D50 1537.40 195.0
DWDM-SFP-10G40KM-D49 1538.19 194.9
DWDM-SFP-10G40KM-D48 1538.98 194.8
DWDM-SFP-10G40KM-D47 1539.77 194.7
DWDM-SFP-10G40KM-D46 1540.56 194.6
DWDM-SFP-10G40KM-D45 1541.35 194.5
DWDM-SFP-10G40KM-D44 1542.14 194.4
DWDM-SFP-10G40KM-D43 1542.94 194.3
DWDM-SFP-10G40KM-D42 1543.73 194.2
DWDM-SFP-10G40KM-D41 1544.53 194.1
DWDM-SFP-10G40KM-D40 1545.32 194.0
DWDM-SFP-10G40KM-D39 1546.12 193.9
DWDM-SFP-10G40KM-D38 1546.92 193.8
DWDM-SFP-10G40KM-D37 1547.72 193.7
DWDM-SFP-10G40KM-D36 1548.51 193.6
DWDM-SFP-10G40KM-D35 1549.32 193.5
DWDM-SFP-10G40KM-D34 1550.12 193.4
DWDM-SFP-10G40KM-D33 1550.92 193.3
DWDM-SFP-10G40KM-D32 1551.72 193.2
DWDM-SFP-10G40KM-D31 1552.52 193.1
DWDM-SFP-10G40KM-D30 1553.33 193.0
DWDM-SFP-10G40KM-D29 1554.13 192.9
DWDM-SFP-10G40KM-D28 1554.94 192.8
DWDM-SFP-10G40KM-D27 1555.75 192.7
DWDM-SFP-10G40KM-D26 1556.55 192.6
DWDM-SFP-10G40KM-D25 1557.36 192.5
DWDM-SFP-10G40KM-D24 1558.17 192.4
DWDM-SFP-10G40KM-D23 1558.98 192.3
DWDM-SFP-10G40KM-D22 1559.79 192.2
DWDM-SFP-10G40KM-D21 1560.61 192.1
DWDM-SFP-10G40KM-D20 1561.42 192.0
DWDM-SFP-10G40KM-D19 1562.23 191.9
DWDM-SFP-10G40KM-D18 1563.05 191.8
DWDM-SFP-10G40KM-D17 1563.86 191.7