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Technology - Discrete Amplification Photon Detector (DAPD)

Amplification Technologies developed a new approach for the detection of low-level signals - multichannel Discrete Amplification (DA) - that allows the simultaneous attainment of very high gain, high speed and ultra-low excess noise in a photodetector devices. The Discrete Amplification concept includes three basic functions:

Amplification Technologies' discrete amplification  photodetectors operate either in analog or photon counting modes. The DAPD provides:

         Photon-counting level sensitivity

         Wide spectral range with relatively flat spectral sensitivity curve

         High photon detection efficiency

         Wide dynamic range

         Fast response

         High voltage stability

         High thermal stability

Some Silicon device characteristics are shown below:




Si DAPD Spectral Response
Silicon DAPD spectral response

Dynamic Range

High dynamic range

 

Charge Distribution

Pulse response

Resolution of the number of photons is presented

Short rise-fall time for a one electron pulse is characteristic of DA photodetectors.

 

Gain Voltage

Parameter

Definition

Unit

Si
DAPD 

Reverse Bias (V) Temperature coefficient

dV/dT

mV/C

20 - 30

Temperature coefficient of Gain

dGain/Gain/dT

C

0.1 - 0.5

Photon Detection Efficiency (PDE) Temperature coefficient

dPDE/PDE/dT

C

0.1 - 0.6

Overvoltage

V - Vbr

V

7 - 20

High voltage and temperature stability

 

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Technology Corporation


Amplification Technologies Inc.


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