7
Receiver Optical Characteristics
(T
A
= 0°C to +70°C, V
CC
= 3.14 V to 3.47 V)
Parameter Symbol Min. Typ. Max. Unit Reference
Input Optical Power P
IN
–17 0 dBm avg. 7
Stressed Receiver Sensitivity 62.5 µm –12.5 dBm avg. 8
50 µm –13.5 dBm avg. 8
Stressed Receiver Eye 201 ps 6, 9
Opening at TP4
Receive Electrical 3 dB 1500 MHz 10
Upper Cuto Frequency
Operating Center Wavelength λ
C
770 860 nm
Return Loss 12 dB 11
Signal Detect – Asserted P
A
–17 dBm avg. 12
Signal Detect – Deasserted P
D
–30 dBm avg. 12
Signal Detect – Hysteresis P
A
– P
D
1.5 dB 12
Notes:
1. The maximum Optical Output Power complies with the IEEE 802.3z specication, and is class 1 laser eye safe.
2. Optical Extinction Ratio is dened as the ratio of the average optical power of the transmitter in the high (“1”) state to the low (“0”) state. Ex-
tinction Ratio shall be measured using the methods specied in TIA/EIA.526.4A. This measurement may be made with the node transmitting
a 36A.3 data pattern. The Saturation Ratio is measured under fully modulated conditions with worst case reections. A36A.3 data pattern is a
repeating K28.7 data pattern, which generates a 125 mHz square wave.
3. These are unltered 20-80% values.
4. Laser transmitter pulse response characteristics are specied by an eye diagram (Figure 1). The characteristics include rise time, fall time,
pulse overshoot, pulse undershoot, and ringing, all of which are controlled to prevent excessive degradation of the receiver sensitivity. These
parameters are specied by the referenced Gigabit Ethernet eye diagram using the required lter. The output optical waveform complies with
the requirements of the eye mask discussed in section 38.6.5 and Fig. 38-2 of IEEE 802.3z.
5. CPR is measured in accordance with EIA/TIA-526-14A as referenced in 802.3z, section 38.6.10.
6. TP refers to the compliance point specied in 802.3z, section 38.2.1.
7. The receive sensitivity is measured using a worst case extinction ratio penalty while sampling at the center of the eye.
8. The stressed receiver sensitivity is measured using the conformance test signal dened in 802.3z, section 38.6.11. The conformance test signal
is conditioned by applying deterministic jitter and intersymbol interference.
9. The stressed receiver jitter is measured using the conformance test signal dened in 802.3z, section 38.6.11 and set to an average optical
power 0.5 dB greater than the specied stressed receiver sensitivity.
10. The 3 dB electrical bandwidth of the receiver is measured using the technique outlined in 802.3z, section 38.6.12.
11. Return loss is dened as the minimum attenuation (dB) of received optical power for energy reected back into the optical ber.
12. With valid 8B/10B encoded data.
HFBR-53A5VEMZ/FMZ, 850 nm VCSEL
Transmitter Optical Characteristics
(T
A
= 0°C to +70°C, V
CC
= 3.14 V to 3.47 V)
Parameter Symbol Min. Typ. Max. Unit Reference
Output Optical Power P
OUT
–9.5 –4 dBm avg. 1
50/125 µm, NA = 0.20 Fiber
Output Optical Power P
OUT
–9.5 –4 dBm avg. 1
62.5/125 µm, NA = 0.275 Fiber
Optical Extinction Ratio 9 dB 2
Center Wavelength λ
C
830 850 860 nm
Spectral Width – rms σ 0.85 nm rms
Optical Rise/Fall Time t
r
/t
f
0.26 ns 3, 4, Figure 1
RIN
12
–117 dB/Hz
Coupled Power Ratio CPR 9 dB 5
Total Transmitter Jitter 227 ps 6
Added at TP2
