Page 45 - Photodetection and Measurement - Maximizing Performance in Optical Systems
P. 45
Amplified Detection Circuitry
38 Chapter Two
8
10 8¥12.5M
Impedance (Ohms) 10 7 6 100M 2¥50M 4¥25M
10
5
10
3 4 5 6 7
10 100 10 10 10 10 10
Frequency (Hz)
Figure 2.15 Calculations of the frequency-variation of impedance for a
100 MW resistor split 2, 4, and 8 ways.
3.50
3.00
2x50M
2.50
100M
Voltage (V) 2.00
1.50
1.00
0.50
0.00
-1000 -750 -500 -250 0 250 500 750 1000
Time (ms)
Figure 2.16 Experimental results for a 100-MW and 2 ¥ 50-MW resistor transimpedance receiver.
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