WT-QSFP+-LR4

Parameter

Symbol

Min.

Typical

Max

Unit

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 SuppressionRatio

SMSR

30

-

-

dB

Total Average LaunchPower

P_T

-

-

8.3

dBm

Average Launch Power, each Lane

-7

-

2.3

dBm

Optical Modulation Amplitude, each Lane

OMA

-4

-

+3.5

dBm

Difference in Launch Power between any two Lanes (OMA)

-

-

6.5

dB

Launch Power in OMA minus Transmitter and Dispersion Penalty (TDP), each Lane

-4.8

-

dBm

TDP, each Lane

TDP

2.3

dB

Extinction Ratio

ER

3.5

-

-

dB

Relative Intensity Noise

R_in

-

-

-128

dB/Hz

12dB reflection

Optical Return Loss Tolerance

-

-

20

dB

Transmitter Reflectance

R_T

-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

P_off

-30

dBm

Receiver

Damage Threshold

TH_d

3.3

dBm

1

Average Power at Receiver Input, each Lane

-13.7

2.3

dBm

Receiver Reflectance

R_R

-

-

-26

dB

Receiver Power (OMA), each Lane

-

-

3.5

dBm

Stressed ReceiverSensitivity in OMA, each Lane

-

-

-9.9

dBm

Receiver Sensitivity, each Lane

S_R

-

-

-11.5

dBm

Difference in Receive Power between any two Lanes (OMA)

7.5

dB

Receive Electrical 3 dB upper Cutoff Frequency, each Lane

12.3

GHz

Conditions of Stress Receiver Sensitivity Test²

Vertical Eye Closure Penalty, each Lane

1.6

dB

Stressed Eye Jitter, each Lane

0.3

UI