5
HFBR-1312TZ Transmitter Output Optical Power and Dynamic Characteristics
Parameter Symbol Min. Typ.
[1]
Max. Unit
Condition
Ref.T
A
I
F, peak
Peak Power
62.5/125 µm
NA = 0.275
P
T62
-16.0 -14.0 -12.5 dBm 25°C 75 mA Notes
2, 3, 4
Fig. 4
-17.5 -11.5 0-70°C 75 mA
-15.5 -13.5 -12.0 25°C 100 mA
-17.0 -11.0 0-70°C 100 mA
Peak Power
50/125 µm
NA = 0.20
P
T50
-19.5 -17.0 -14.5 dBm 25°C 75 mA Notes
2, 3, 4
Fig. 4
-21.0 -13.5 0-70°C 75 mA
-19.0 -16.5 -14.0 25°C 100 mA
-20.5 -13.0 0-70°C 100 mA
Optical Overshoot OS 5 10 % 0-70°C 75 mA Note 5
Fig. 5
Rise Time t
r
1.8 4.0 ns 0-70°C 75 mA Note 6
Fig. 5
Fall Time t
f
2.2 4.0 ns 0-70°C 75 mA Note 6
Fig. 5
Notes:
1. Typical data are at T
A
= 25°C.
2. Optical power is measured with a large area detector at the end of 1 meter of mode stripped cable, with an ST* precision ceramic ferrule
(MIL-STD-83522/13), which approximates a standard test connector. Average power measurements are made at 12.5 MHz with a 50% duty
cycle drive current of 0 to I
F,peak
; I
F,average
= I
F,peak
/2. Peak optical power is 3 dB higher than average optical power.
3. When changing from µW to dBm, the optical power is referenced to 1 mW (1000 µW).
Optical power P(dBm) = 10*log[P(µW)/1000µW].
4. Fiber NA is measured at the end of 2 meters of mode stripped ber using the far-eld pattern. NA is dened as the sine of the half angle,
determined at 5% of the peak intensity point. When using other manufacturer’s ber cable, results will vary due to diering NA values and test
methods.
5. Overshoot is measured as a percentage of the peak amplitude of the optical waveform to the 100% amplitude level. The 100% amplitude level
is determined at the end of a 40 ns pulse, 50% duty cycle. This will ensure that ringing and other noise sources have been eliminated.
6. Optical rise and fall times are measured from 10% to 90% with 62.5/125 µm ber. LED response time with recommended test circuit (Figure 3)
at 25 MHz, 50% duty cycle.
Figure 4. Normalized transmitter output power vs. forward currentFigure 3. Typical forward voltage and current characteristics
100
1.1 1.2 1.3 1.4 1.5 1.6
V
F
- FORWARD VOLTAGE - V
I
F
- FORWARD CURRENT - mA
90
80
70
60
50
40
20
30
1.2
10 30 50 70 90
RELATIVE POWER RATIO
1.1
0.8
0.7
0.5
0.4
0.3
0.2
I
F
- FORWARD CURRENT - mA
0.9
1.0
0.6