Efficient Low-Dark-Count Detector for Photon Counting

Award Information
Agency:
Department of Commerce
Branch
National Institute of Standards and Technology
Amount:
$299,998.00
Award Year:
2009
Program:
SBIR
Phase:
Phase II
Contract:
n/a
Agency Tracking Number:
409-08
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
Voxtel, Inc.
12725 SW Millikan Way, Suite 230, Beaverton, OR, 97005
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
() -
Business Contact:
() -
Research Institution:
n/a
Abstract
Voxtel has demonstrated efficient high-speed photon counting with thresholded linear-mode avalanche photodiode (APD) receivers using multi-gain-stage InGaAs/InAIAs APDs. In contrast to Geiger APDs, thresholded photon-counting linear APD receivers are thought not to suffer afterpulsing, and can support maximum count rates (MCR) up to 2 or 3 orders of magnitude faster than Geiger APDs. However, the early embodiments of this new photon-counting receiver have a much higher dark count rate (DCR) than InGaAs Geiger-mode APDs. In the Phase II project, Voxtel proposes to reduce the dark count contributions from both the APD and the transimpedance amplifier by developing a new embodiment of the multi-stage APD in the Phase II program that substitutes InP for InAIAs in the multiplier, and simultaneously by fundamentally improving the amplification using a new, ultra-low-noise capacitive-feedback transimpedance amplifier (CTIA).

* information listed above is at the time of submission.

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