GAOTek SFP+ Tunable Transceiver with 10 Gb/s (80km)

This 10 Gigabit SFP+ (enhanced small form-factor pluggable) Tunable Transceiver is used with single mode optical fiber to reach up to 49.72 miles (80km) transmission distance





This 10 Gigabit SFP+ (enhanced small form-factor pluggable) Tunable Transceiver is used with single mode optical fiber to reach up to 49.72 miles (80km) transmission distance. It has a C-band-tunable integrated Mach-Zehnder (MZ) laser type transmitter and an APD transceiver. It provides a unique enhanced digital diagnostic monitoring interface. It complies with the ITU-T G.698.1 standard.

Key Features:

    • Monolithically integrated full C-band tunable transmitter and APD receiver.
    • Up to 49.72 miles (80km) transmission distance
    • Single 3.3V power supply
    • Compliant with SFP+ MSA with LC connector
    • Metal enclosure, for lower EMI
    • 50 GHz ITU channel spacing with integrated wavelength locker.
    • Hot-pluggable SFP+ footprint
    • 2-wire interface with integrated Digital Diagnostic monitoring
    • Management specifications compliant with SFF-8472 V11.3& SFF-8690 V1.4
    • Power dissipation <1.65W
    • Case operating temperature range from 23°F to 158°F (-5°C to +70°C)


Technical Specifications:

Protocol2-Wire Serial communication Protocol
Working RangeUp to 49.72 miles (80km)
Memory256-byte memory map in EEPROM
StandardsSFF-8472 V11.3 and SFF-8690 V1.4.                               ITU-T G.698.1.
Data rate10 Gb/s
Single Mode Fiber9/125um
TransmitterC-band-tunable integrated MZ laser
Center Wavelength Spacing50 GHz
Transmitter output optical Power-1 dBm to -3 dBm
Receiver Input Saturation Power-6 dBm
Supply Voltage3.3V
Transmitter Input Differential Impedance100Ω
Dimensions2.26in x 0.54in x 0.47in (L 57.3mm x W13.7mm x   H 11.9mm)
Relative humidity5% to 85%
Storage Temperature-40 °F to 185 °F (-40°C to 85°C)
Case Operating Temperature23 °F to 158 °F (-5°C to 70°C)

Additional Information:


Ideal to be used on applications such as

  • DWDM 80KM 10G Fiber Channel
  • DWDM 10GBASE-ZR/ZW 10G Ethernet

 Ordering Information:

Product ID MediaWavelengthTransmission DistanceTemperature RangeSupply Current


Single-mode fiberC-band Tunable module49.72miles(80km)23°F to 158°F (-5°C to +70°C)


500 mA


  • When a tunable module is plugged in for the first time, it will go to a default wavelength 1568.36nm, compatible with channel range from 1 to 99.
  • When the module is power cycled it will automatically go to the last channel, or when the Tx_Disable asserted and then re-enabled, the module returns to the last channel.

 Wavelength Table

91565.09191.55591544.92194. 05
101564.68191.60601544.53194. 10
111564.27191.65611544.13194. 15
121563.86191.70621543.73194. 20
131563.45191.75631543.33194. 25
141563.05191.80641542.94194. 30
151562.64191.85651542.54194. 35
161562.23191.90661542.14194. 40
171561.83191.95671541.75194. 45
181561.42192.00681541.35194. 50
191561.01192.05691540.95194. 55
201560.61192.10701540.56194. 60
211560.20192.15711540.16194. 65
221559.79192.20721539.77194. 70
231559.39192.25731539.37194. 75
241558.98192.30741538.98194. 80
251558.58192.35751538.58194. 85
261558.17192.40761538.19194. 90
271557.77192.45771537.79194. 95
281557.36192.50781537.40195. 00
291556.96192.55791537.00195. 05
301556.55192.60801536.61195. 10
311556.15192.65811536.22195. 15
321555.75192.70821535.82195. 20
331555.34192.75831535.43195. 25
341554.94192.80841535.04195. 30
351554.54192.85851534.64195. 35
361554.13192.90861534.25195. 40
371553.73192.95871533.86195. 45
381553.33193.00881533.47195. 50
391552.93193.05891533.07195. 55
401552.52193.10901532.68195. 60
411552.12193.15911532.29195. 65
421551.72193.20921531.90195. 70

Test pattern:

  • Measured with BER<10-4 @ data rate 10.709 Gb/s,11.1 Gb/s and 11.3 Gb/s and BER<10-12 @ data rate 9.95,10.3,10.5 Gb/s

BER<10-12   and BER<10-12   represents bit error rate testing provides a measurable and useful indication of the performance of the system.

  • 20 – 80 % Measured with Module Compliance Test Board and OMA test pattern.

Digital Diagnostics Functions:

  • GAOTek GAO-SFPPT-101 transceiver support the 2-wire serial communication protocol as defined in the SFP MSA1.
  • Additionally, GAOTek SFP+ Transceivers provide a unique enhanced digital diagnostic monitoring interface which allows real-time access to device operating parameters such as transmitter optical power, receiver optical power, transceiver temperature, transceiver supply voltage and laser bias current. It defines an alarm system and warning flags, which alerts the end users when particular operating parameters are outside of a factory set normal range.
  • Standard SFP+ Serial id provides access to identification information that describes the transceiver’s capabilities, standard interfaces, manufacturer and other information.
  • SFP+ MSA defines a 256-byte memory map in EEPROM that is accessible over a 2 wire serial interface at the 8 bit address 1010000X (A0h).
  • The operating and diagnostics information is monitored and reported by a Digital Diagnostics Transceiver Controller (DDTC) inside the transceiver, which is accessed through a 2-wire serial interface. The memories are organized as a series of 8-bit data words that can be addressed individually or sequentially

Electrical characteristics:

Input Differential ImpedanceRin100
Differential data input swingVin, pp240910mV
Transmit Disable VoltageVDVcc–1.3VccV
Transmit Enable VoltageVENVeeVee+ 0.8V
TX_FAULT Voltage-HighVcc–1.3VccV
TX_FAULT Voltage-LowVeeVee+ 0.8V
Differential data output swingVout,pp350800mV
Data output rise timetr30ps
Data output fall timetf30ps
LOS FaultVcc–1.3VccHOSTV1
LOS NormalVeeVee+0.8V1


  1. Loss of Signal is LVTTL. Logic 0 indicates normal operation; logic 1 indicates no signal detected.

Optical Characteristics:

Average Optical PowerPOUT-13dBm
Frequency stability (BOL)ƒ c –1.5ƒ c +1.5GHz
Frequency stability (EOL)ƒ c –2.5ƒ c +2.5GHz
Optical Extinction RatioER8.2dB
Center Wavelength Spacing50GHz
Average Launch Power(Laser off)Poff-30dBm
Output Eye MaskIEEE 802.3ae requirements
Side-mode Supression ratioSMSR35dB
Rx Sensitivity with dispersion 0 ps/nmRSENS-23dBm@9.95, 10.3, 10.5Gbps
Rx Sensitivity with dispersion 0 ps/nmRSENS-21dBm@9.95, 10.3, 10.5Gbps
Wavelength RangeλC14801580nm
Input Saturation Power (Overload)Psat-6dBm
LOS AssertLOSA-36dBm
LOS De -AssertLOSD-27dBm
                      LOS Hysteresis0.5dB

Timing parameters:

Time to initialize cooled moduleTstart_up  20S 
Channel Switch timeTchannelSwitch  200msAny channel to any channel

PIN out Diagram:

PIN Descriptions:

PinSymbol Name/DescriptionNote
1VEETTransmitter Ground (Common with Receiver Ground)1
2TFaultTransmitter Fault2
3TDisTransmitter Disable.3
4SDA2-wire Serial Interface Data Line4
5SCL2-wire Serial Interface Clock Line4
6MOD_ABSModule Absent. Grounded within the module5
7RS0Rate select 06


8LOSLoss of Signal indication. Logic 0 indicates normal operation7
9RS1No connection required1
10VEERReceiver Ground (Common with Transmitter Ground)1
11VEERReceiver Ground (Common with Transmitter Ground)1
12RD-Receiver Inverted DATA out. AC coupled
13RD+Receiver Non-inverted DATA out. AC coupled
14VEERReceiver Ground (Common with transmitter Ground)1
15VCCRReceiver power Supply
16VCCTTransmitter Power supply
17VEETTransmitter Ground (Common with receiver Ground)1
18TD+Transmitter Non-Inverted DATA in. AC Coupled.
19TD-Transmitter Inverted DATA in.AC Coupled.
20VEETTransmitter Ground1


  1. Circuit ground is internally isolated from ground.
  2. TFault is an open collector or drain output.
    • It should be pulled up with a 4.7k -10k ohms resistor on the host board if intended for use.
    • Pull up voltage should be between 2.0V to Vcc +0.3V.
    • High output indicates a transmitter fault caused by either the TX bias current or the TX output power exceeding the preset alarm thresholds.
    • Low output indicates normal operation. In the low state output is pulled to <0.8V
  3. Laser output disabled when it is open or TDis > 2.0V, enabled on TDis < 0.8V.
  4. Should be pulled up with 4.7kΩ to 10kΩ on host board to a voltage between 2.0V and 3.6V.
  5. MOD_ABS pulls the line low to indicate the module is plugged in.
  6. Internally pull down per SFF-8431.
  7. Loss of signal is open collector output.
  • This should be pulled up with 4.7 kΩ to 10 kΩ on host board to a voltage between 2.0V and 3.6V.
  • Logic 0 indicates normal operation.
  • Logic 1 indicates loss of signal.

Mechanical Specifications:

Improved Pluggable form factor specification Comply to SFF-8432

HOST-Transceiver Interface Block Diagram: