100G QSFP28 SWDM4 Optical Transceiver

Transmitter Parameter

Lane

Min

Typical

Max

Unit

Note

Signaling rate, each lane

25.78125±100ppm

Gb/s

Lane Wavelength Range

Lane0

Lane1

Lane2 

Lane3

844

874

904

934

858

888

918

948

nm

Modulation Format

NRZ

Difference in launch power between any two lanes

4.5

dBm

RMS Spectral width

0.59

nm

1

Optical Modulation Amplitude (OMA), each lane

-5.5

3

dBm

2

Average Launch Power per Lane @ TX Off State

-30

dBm

Launch Power in OMA minus TDEC

Lane0 

Lane1 

Lane2 

Lane3

-7

-7

-7.4

-7.7

dBm

Transmitter and Dispersion Eye Closure

Lane0 

Lane1 

Lane2 

Lane3

4

4   

4.4

4.8

dB

3

Extinction Ratio

2

dB

Optical Return Loss Tolerance

12

dB

Encircled Flux

≥86% at 19 um ≤30% at 4.5 um

4

Transmitter eye mask definition {X1,X2, X3, Y1, Y2, Y3}

Hit ratio 1.5x10-3 hits per sample

{0.3,0.38,0.45,0.35,0.41,0.5}

Notes:

1. RMS spectral width is the standard deviation of the spectrum.

2. The normative lowest value of OMA for a compliant transmitter is ‘ Launch power in OMA minus TDEC, each lane (min)’ plus the actual value of ‘TDEC’, but with a value of at least ‘OMA, each lane (min)’ .

3. TDEC is calculated from the measured TDECm using the methods in 3.6.  TDECm is measured following the method in IEEE 802.3

clause 95.8.5 using a 12.6 GHz bandwidth reference receiver for all lanes.

4. If measured into type A1a.2 or type A1a.3 50 um fiber in accordance with IEC 61280-1-4.

Receiver Parameter

Lane

Min

Typical

Max

Unit

Note

Signaling rate, each lane

25.78125±100ppm

Gb/s

Lane Wavelength Range

Lane0

Lane1 

Lane2 

Lane3

844

874

904

934

858

888

918

948

nm

Modulation Format

NRZ

Damage Threshold

4.4

dBm

Average Receive Power, each lane

Lane0 

Lane1 

Lane2 

Lane3

-9.5

-9.4

-9.4

-9.4

3.4

dBm

Receiver Power, each lane (OMA)

3

dBm

Receiver Reflectance

-12

dB

unStressed Receiver Sensitivity(OMA)

Lane0 

Lane1 

Lane2 

Lane3

-8.2

-8.4

-8.6

-8.8

dBm

1

RX_Los_Assert

-30

dBm

RX_Los_De-ASSERT

-12

dBm

RX_Los_Hysteresis

0.5

dBm

1.unstressed sensitivity at BER of 5E-5(pre FEC)

Parameters

Unit

Specification

Temperature Monitor

± 3

Voltage Monitor

V

± 5 %

I_bias Monitor

mA

± 10 %

Received Power (Rx) Monitor

dB

± 3.0

Transmit Power (Tx) Monitor

dB

± 3.0

Transmitter electrical input signal characteristics(TP1)

Min

Typical

Max

Unit

Signaling rate per lane (range)

25.78125 ± 100 ppm

GBd

Differential input return loss

Equation (83E–5)

dB

Differential to common mode input return loss

Equation (83E–6)

dB

Differential termination mismatch

10

%

Module stressed input test

See 83E3.4.1

Differential pk-pk input voltage tolerance

900

mV

DC common mode voltage

-350

2850

mV

Single ended voltage tolerance range

-0.4

3.3

V

Receiver electrical output signal characteristics(TP4)

Min

Typical

Max

Unit

Signaling rate per lane (range)

25.78125 ± 100 ppm

GBd

AC common-mode output voltage (RMS)

17.5

mV

Differential output voltage

900

mV

Eye width

0.57

UI

Eye height, differential

228

mV

Vertical eye closure

5.5

dB

Differential output return loss

Equation (83E–2)

dB

Common to differential mode conversion return loss

Equation (83E–3)

dB

Differential termination mismatch

10

%

Transition time (20% to 80%)

12

ps

DC common mode voltage

-350

2850

mV