8
HFBR-5912EZ Family, 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
Input Optical Power P
IN
-17 0 dBm avg. 7
Stressed Receiver Sensitivity 62.5 µm
50 µm
-12.5
-13.5
dBm avg.
dBm avg.
8
8
Stressed Receiver Eye Opening at TP4 201 ps 6,9
Receive Electrical 3 dB
Upper Cutoff Frequency
1500 MHz 10
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
Parameter Symbol Min. Typ. Max. Unit Reference
Output Optical Power
50/125 µm, NA = 0.20 Fiber
P
OUT
-9.5 -4 dBm avg. 1
Output Optical Power
62.5/125 µm, NA = 0.275 Fiber
P
OUT
-9.5 -4 dBm avg. 1
Disabled Transmit Output Power P
OUT DISABLED
-30.0 dBm avg.
Optical Extinction Ratio 9 dB 2
Center Wavelength
λ
C
830 850 860 nm
Spectral Width - rms s 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
Added at TP2
227 ps 6
Notes:
1. The maximum Optical Output Power complies with the IEEE 802.3z specification, and is Class 1 laser eye safe.
2. Optical 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. The
transmitter is driven with a Gigabit Ethernet 1250 MBd 8B/10B encoded serial data pattern. This Optical Extinction Ratio is expressed in decibels
(dB) by the relationship 10log(Phigh avg/Plow avg).
3. These are unfiltered 20-80% values.
4. Laser transmitter pulse response characteristics are specified 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 specified by the referenced Gigabit Ethernet eye diagram using the required filter. 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 specified 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 defined 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 defined in 802.3z, section 38.6.11 and set to an average optical power 0.5
dB greater than the specified 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 defined as the minimum attenuation (dB) of received optical power for energy reflected back into the optical fiber.
12. With valid 8B/10B encoded data.
Receiver Optical Characteristics
(T
A
= 0°C to +70°C, V
CC
= 3.14 V to 3.47 V)
