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Discrete Amplification Photon Detector (DAPD)

ANNOUNCING A NEW DIGITAL DAPD RECEIVER

1550nm Digital 5x5 DAPD Array Time-of-Flight LiDAR Receiver



1550nm Digital 5×5 DAPD Array Time-of-Flight LiDAR Receiver

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Discrete Amplification Photon Detector (DAPD) Optimized for 3D LiDAR Applications

Amplification Technology developed and offers various photon-detector array configuration as well as single photon-detector. Our photon detectors are based on a unique semiconductor photon detection technology: Discrete Amplification Photon Detector (DAPD). The technology is based on a multi-cell design, where a photo-detector is comprised of many (hundreds) micro-channel cells, so called micro-cells. These micro-cells are electronically grouped together to form the anode of the photodetector.

 

In addition, monolithic integration of a negative feedback mechanism completed this design, to form the DAPD. The outcome design is one that operates with a direct current biasing, in which the DAPD is always on, and does not have “dead-time”. The output of a detected photon, or an ensemble of photons, is an electronic short pulse, with height that is proportional to the number of detected photons.
Using the patented Discrete Amplification technology platform, photon detectors were implemented, with a wide dynamic range: from detecting a single photon, with approximately 25% single-Photon-Detection Efficiency, (PDE), up to thousands of photons, with a signal that is proportional to the number of photon.  The DAPD is specifically usable in Light Detection And Ranging (LiDAR) applications, especially when comparing the DAPD to Geiger-Mode Avalanche Photo-Detectors (GM-APD), because of the high throughput, the wide dynamic range, and the simplification of the biasing electronic circuit.  One of the main advantages of the DAPD is the simplification of the post-detection digital signal processing (DSP) functions that are necessary to generate the point cloud rendering of the 3D scanning scene.  More details can be found here.
In summary the DAPD is a detector/array that is specifically optimized for LiDAR applications, operating in the 1550nm wavelength range, with the following benefits:

  • Single and multi photon detection ability: linear response to number of photons

  • Fast recovery time; no ‘dead time’

  • Simpler electronic, RF signal extraction and subsequent DSP processing

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Key Features

Wavelength Range

Photon detectors available using InGaAs/InP absorbing layer for responsivity in a wide spectral range between 950nm to 1650nm

Sensitivity Level

Single photon level sensitivity with high (single) Photon Detection efficiency (PDE) of up to 25%

Stability

Excellent voltage and thermal stability

Linearity (proportionality)

Output signal is proportional to the amount of photons per pulse

Dynamic Range Wide dynamic range

>25dB for the 200µm DAPD

Fast response

Fast response (rise time <0.4ns), which is a function of a micro-cell, not the active area (photo-detection aperture) size

Recovery Time

Extremely fast recovery of a single micro-cell: with half time for recovery of ~50ns to 100ns

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Other Applications

  • Laser Range Finding (LRF)

  • Night vision

  • Cameras and imaging systems

  • Security systems

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    Amplification Technology Inc., a division of Powersafe Technology Corp. (PSFT)