100Gb/s QSFP28 SR4 100m

Parameter

Symbol

Unit

Min

Typ

Max

Notes

Transmitter

Signaling rate, each lane

DRpl

Gb/s

25.78125 ±100 ppm

1

Center Wavelengthe

λ

nm

840

850

860

RMS Spectral Width

nm

0.6

Average launch power, each lane

Pavg

dBm

-8.4

2.4

Optical modulation amplitude, each lane (OMA)

OMA

dBm

-6.4

3

Extinction ratio

ER

dB

2

Average Launch Power of OFF

Transmitter, per Lane

RIN

dBm

-30

Encircled Flux

FLX

dBm

>86% at 19 um

<30% at 4.5 um

Optical return loss tolerance

dB

12

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

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

2

Receiver

Receive Rate for Each Lane

DRpl

Gb/s

25.78125 ±100 ppm

3

Four Lane Wavelength Range

λ

nm

840

860

Overload Input Optical Power

Pmax

dBm

3.4

Average Receive Power for Each

Lane

Pin

dBm

-10.3

2.4

4

Receiver Sensitivity(OMA)per lane

Psens

dBm

-5.2

Recevier Reflectance

Rfl

dB

-12

Receiver Eye MaskDefinition {X1, X2, X3, Y1, Y2,Y3}

{0.28,0.5,0.5,0.33,0.33,0.4}

5

Los De-Assert

Pd

dBm

-13

Los Assert

Pa

dBm

-30

Loss Hysteresis

Pd-Pa

dBm

0.5