QSFP+-LR4

Parameter

Symbol

Min

Typical

Max

Units

Notes

Wavelength Assignment

L0

1264.5

1271

1277.5

nm

L1

1284.5

1291

1297.5

nm

L2

1304.5

1311

1317.5

nm

L3

1324.5

1331

1337.5

nm

Transmitter

Side Mode Suppression Ratio

SMSR

30

dB

Total Average Launch Power

PT

8.3

dBm

Average Launch Power, each Lane

PAVG

-7

2.3

dBm

Optical Modulation Amplitude

(OMA), each Lane

POMA

-4

3.5

dBm

1

Difference in Launch Power between any Two Lanes (OMA)

Ptx,diff

6.5

dB

Launch Power in OMA minus

Transmitter and Dispersion

Penalty (TDP), each Lane

-4.8

dBm

TDP, each Lane

TDP

2.6

dB

Extinction Ratio

ER

3.5

dB

Relative Intensity Noise

RIN

-128

dB/Hz

12dB

reflection

Optical Return Loss Tolerance

TOL

20

dB

Transmitter Reflectance

RT

-12

dB

Transmitter Eye Mask Definition

{X1, X2, X3, Y1, Y2, Y3}

{0.25,0.4,0.45,0.25,0.28,0.4}

Average Launch Power OFF

Transmitter, each Lane

Poff

-30

dBm

Receiver

Damage Threshold, each Lane

THd

3.3

dBm

2

Total Average Receive Power

8.3

dBm

Average Receive Power, each

Lane

-13.7

2.3

dBm

Receiver Reflectance

RR

-26

dB

Receive Power (OMA), each Lane

3.5

dBm

Receiver Sensitivity (OMA), each

Lane

SEN

-11.5

dBm

Stressed Receiver Sensitivity

(OMA), each Lane

-9.6

dBm

3

Difference in Receive Power

between any Two Lanes (OMA)

 Prx,diff

7.5

dB

LOS Assert

LOSA

-28

dBm

LOS Deassert

LOSD

-15

dBm

LOS Hysteresis

LOSH

0.5

dB

Receiver Electrical 3 dB upper

Cutoff Frequency, each Lane

Fc

12.3

GHz

Conditions of Stress Receiver Sensitivity Test (Note 4)

Vertical Eye Closure Penalty, each

Lane

1.9

dB

Stressed Eye J2 Jitter, each Lane

0.3

UI

Stressed Eye J9 Jitter, each Lane

0.47

UI