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High Sensitivity Detector Unit0 pages
High Sensitivity Detector Unit APD210/310
For applications that require highest sensitivity. The APD avalanche photodiodes can provide an
extremely sensitive alternative to traditional PIN photodiodes. The APD is sensitive and fast enough
for the characterization of, for example, pulsed solid-state lasers on the nanosecond time scale. It
maintains high gain stability over the 10 °C to 40 °C temperature range by utilizing a temperature
compensation circuit, which adjusts the ~150 V DC bias to ensure operation near the breakdown
voltage.
Features
• High speed response: Bandwidth 1 MHz to 1 GHz
• Spectral range APD210: 400 nm-1000 nm
• Spectral range APD310: 850 nm-1650 nm
• Temperature independent gain from 10-40 ° C
Applications
Detection of
• Fast laser pulses
• Low light level signals
• Beat signals of low level inputs
50
40
30
20
10
0
400 600 800 1000
Photo Sensitivity [A/W]
Wavelength [nm] Wavelength [..m]
(Typ. Ta=25 °C, M=1)
Spectral Response APD310
1.0
0.8
0.6
0.4
0.2
0
0.6 0.8 1 1.2 1.4 1.6 1.8
Photo Sensitivity [A/W]
Spectral Response APD210
(Typ. Ta=25 °C, M=100)
Pulse Response APD310 of a Sub-ns Pulse Train,
1560 nm, 50 MHz Repetition Rate
-0,4
-0,2
0,0
0,2
0,4
0,6
0,8
1,0
1,2
1,4
-25 -15 -5 5 15 25
Time [ns]
Signal [V]
Pulse Response APD210 of a Sub-ns Pulse Train,
780 nm, 50 MHz Repetition Rate
-0,4
-0,2
0,0
0,2
0,4
0,6
0,8
1,0
1,2
1,4
-25 -15 -5 5 15 25
Time [ns]
Signal [V]
