8

Optical Characteristics

Transmitter Optical Characteristics

Parameter

Symbol

Min.

Typ.

Max.

Unit

Reference

Output Optical Power

–8

–4

–2

dBm avg.

1

Output Optical Power – Off State

–30

dBm avg.

Extinction Ratio

Output Power -2 to -8 dBm

ER

6

7

dB

2

Center Wavelength

830

850

860

nm

Spectral Width – rms

s

0.4

0.85

nm rms

Rise/Fall Time

50

100

ps

3

Inter-channel Skew

110

200

ps

4

Relative Intensity Noise

RIN

–124

dB/Hz

Jitter Contribution

Deterministic

Total

DJ

TJ

20

60

60

120

5

6

Notes:

1. The specified optical output power, measured at the output of a short test cable, will be compliant with IEC 60825-1 Amendment 2, Class 1

Accessible Emission Limits, AEL, and the output power of the module without an attached cable will be compliant with the IEC 60825-1 Amendment

2, Class 1M AEL. See discussion in the Regulatory Compliance section.

2. Extinction Ratio is defined as the ratio of the average output optical power of the transmitter in the high (“1”) state to the low (“0”) state and is

expressed in decibels (dB) by the relationship 10log(Phigh avg/Plow avg). The transmitter is driven with a 550 MBaud, 27-1 PRBS serial encoded

pattern.

3. These are filtered rise/fall time measurements as defined in IEEE Gb Ethernet specification using a 2.488GBd (1.875 GHz bandwidth) 4th Bessel

Thompson filter. A max spec of 100ps for unfiltered waveform is equivalent to a max spec 215ps for filtered waveform.

4. Inter-channel Skew is defined for the condition of equal amplitude, zero ps skew input signals.

5. Deterministic Jitter (DJ) is defined as the combination of Duty Cycle Distortion (Pulse-Width Distortion) and Data Dependent Jitter. Deterministic

pattern with zero skew between the differential data input signals.

for DJ.