USA flag logo/image

An Official Website of the United States Government

Hole-Initiated-Avalanche, Linear-Mode, Single-Photon-Sensitive Avalanche…

Award Information

National Aeronautics and Space Administration
Award ID:
Program Year/Program:
2011 / SBIR
Agency Tracking Number:
Solicitation Year:
Solicitation Topic Code:
Solicitation Number:
Small Business Information
Voxtel, Inc.
OR Beaverton, OR 97006-6703
View profile »
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
Phase 1
Fiscal Year: 2011
Title: Hole-Initiated-Avalanche, Linear-Mode, Single-Photon-Sensitive Avalanche Photodetector with Reduced Excess Noise and Low Dark Count Rate
Agency: NASA
Contract: NNX11CF20P
Award Amount: $100,000.00


A radiation hard, single photon sensitive InGaAs avalanche photodiode (APD) receiver technology will be demonstrated useful for long range space based optical telecommunications in the spectral range from 1000 to 1600 nm. The innovation is based on a linear mode (lm) single photon sensitive APD technology for which avalanche gain as high as M = 8000 has been demonstrated. Single photon detection efficiency (PDE) up to 80% has been demonstrated at 1064 nm, as well as maximum count rates in excess of 300 MHz. In the proposed effort, the dark count rate of these detectors will be reduced to the order of kHz while preserving PDE and maximum count rate. Detector dark current will be lowered by two orders of magnitude through implementation of the APD design using aluminum-free alloys with 100x lower trap density than the current design. In Phase I, a series of single element detectors of varying diameter, as well as small sized arrays, will be fabricated from the new aluminum-free material, and the corresponding decrease in dark count rate will be measured. In Phase II, radiation and lifetime testing will be repeated for the aluminum-free design, and large-area segmented detectors will be coupled to readout integrated circuits and demonstrated.Voxtel anticipates that its technology will enter the program at TRL=4, finish Phase I at TRL=5, and exit the Phase II program at TRL=6.

Principal Investigator:

Andrew Huntington
Principal Investigator

Business Contact:

Debra Ozuna
Business Official
Small Business Information at Submission:

Voxtel, Inc.
OR Beaverton, OR 97006-6703

EIN/Tax ID: 931285205
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No