16
Transmitter Optical Characteristics
T
C
= -10°C to +85°C, V
CC
= 3.1 V to 3.5 V)
Receiver Optical Characteristics
T
C
= -10°C to +85°C, V
CC
= 3.1 V to 3.5 V
Notes:
1. The maximum Optical Output Power complies with IEEE 802.3 specication, and is class 1 laser eye safe.
2. These are unltered 20 - 80% values.
3. An eye diagram (Figure 9) species laser transmitter pulse response characteristics. The characteristics include rise time, fall time, pulse
undershoot, and ringing, all of which are controlled to prevent excessive degradation of the receiver sensitivity. The referenced Gigabit Eth-
ernet eye diagram using the required lter species these parameters. The output optical wavefomr complies with the requirements of the
eye mask discussed in section 38.6.5 and Fig 38-2 of IEEE 802.3.
4. TP refers to the compliance point specied in 802.3, section 38.2.1.
5. The receiver sensitivity is measured using a worst case extinction ratio penalty while sampling at the center of the eye.
For a 2
7
-1 PRBS the receiver will provide output data with better than or equal to 1E-12 BER.
6. The stressed receiver sensitivity is measured using the conformance test signal dened in 802.3, section 38.6.11. The conformance test sig-
nal is conditioned by applying deterministic jitter and intersymbol interference.
7. The stressed receiver jitter is measured using the conformance test signal dened in 802.3, section 38.6.11 and set to an average optical
power 0.5dB greater than the specied stressed receiver sensitivity.
8 In order to meet the 10 km link power budget the transmitter can trade o spectral width and center wavelength as shown in Figure 10.
Parameter Symbol Min Typ Max Unit Notes
Output Optical Power 9 µm SMF
62.5 µm MMF
50 µm MMF
P
OUT
-9.5
-11.5
-11.5
-3
-3
-3
dBm 1
Optical Extinction Ratio ER 9 dB
Center Wavelength Cl 1278 1343 nm 8, Fig 10
Spectral Width - RMS 1.4 2.8 nm 8, Fig 10
Optical Rise/Fall Time T
RISE/FALL
0.26 ns 2, 3, Fig 9
Random Intensity Noise RIN
12
-120 dB/Hz 3
Contributed Total Jitter added at TP2 TJ 227 ps 4
Coupled Power Ratio 62.5 µm MMF CPR 28<CPR<40
Coupled Power Ratio 50 µm MMF CPR 12<CPR<20
Parameter Symbol Min Typ Max Unit Reference
Receiver Overload P
IN
MAX -3 dBm avg
Receiver Sensitivity P
IN
MIN -20 dBm avg 5
Stressed Receiver Sensitivity -14.4 dBm avg 6
Stressed Receiver Eye Opening at TP4 201 ps 4, 7
Receiver Electrical 3 dB Upper Cuto Frequency 1500 MHz
Operating Center Wavelength L
C
1270 1570 nm
Return Loss 12 dB
Signal Detect - Asserted P
A
-20 dBm avg
Signal Detect - Deasserted P
D
-30 dBm avg
Signal Detect - Hysteresis P
A
- P
D
1.5 dB
