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Quadrant
Detector
RMD introduces
the first stand-alone Quadrant Array Avalanche Photodiode
(APD) Module. The wall-plug system provides a voltage output
from 4-discrete APD elements ready for your data acquisition
instrument. No additional electronics or pulse amplification
is required for most applications.
Features
- 2 x 2 array of 4 mm2 APD pixels
- 4 independent voltage output signals with a 12 MHz bandwidth
- Signal gain > 5000
- Quantum Efficiency near 80% between 830 – 905 nm
- Detector module and power supply module are physically
separate
- Variable bias control
- Wall-plug operation
Applications
- Position Sensing
- Target Tracking
- Laser Ranging
- Fluorescence Spectroscopy
- Scintillation Detection, Nuclear Imaging, and Tritium
Detection
With quantum efficiencies as high as 80% in the red and near-infrared
wavelengths, these modules are excellent replacements for
photomultiplier tubes. Quadrant array modules are available
with a standard 2 x 2 format of 4 mm² APD elements; custom
tailored modules to meet your needs are also available.
| Electrical |
Optical |
Mechanical |
| Bias voltage range 0 – 2000 V |
Output pulse rise time 80 ns |
Array format 2 x 2 APD elements, 2.48 mm pitch |
| Maximum gain > 4000 |
Output bandwidth 12 MHz |
Single pixel active area 4 mm² |
| Input noise/pixel (at 2 MHz) 30 photons RMS |
Quantum efficiency (830 nm – 905 nm) near 80% |
Total active area 16 mm² |
| Total dark current at 19 °C 500 nA |
Crosstalk 5% |
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| Capacitance 0.7 pf/mm |
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| Maximum Rating |
Power Unit |
Detector Head |
| Power dissipation 0.1 W |
AC input 100/120/220/240 VAC, 50/60 Hz |
Input/output connector 7-pin multi-conductor |
| Operating temp. -55 to 40°C |
Output connector BNC Coaxial |
HV input BNC |
| Bias voltage 1850 V |
Size and weight 5 lbs., 7.4" x 7.4"
x 2.5" |
Size and weight 1 lbs., 3" x 2.63"
x 1.65" |
The typical electrical, optical and mechanical characteristics
are given above for 2 x 2 quadrant arrays with 4 mm²
APD elements at 22°C and 1750 V bias, unless otherwise noted.
Caution: The operating voltages of up to 1850 volts supplied
by this module may present a shock hazard.
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