Interceptor Seekers

Award Information
Agency:
Department of Defense
Branch
Missile Defense Agency
Amount:
$100,000.00
Award Year:
2009
Program:
SBIR
Phase:
Phase I
Contract:
HQ0147-09-C-7104
Agency Tracking Number:
B083-002-0483
Solicitation Year:
2008
Solicitation Topic Code:
MDA08-002
Solicitation Number:
2008.3
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:
124348652
Principal Investigator:
Andrew Huntington
Senior APD Engineer
(971) 223-5646
andrew@voxtel-inc.com
Business Contact:
George Williams
President
(971) 223-5646
georgew@voxtel-inc.com
Research Institution:
n/a
Abstract
A radiation-hard, 1064-nm sensitive, single-photon-sensitive avalanche photodiode (APD) detector with photon detection efficiency (PDE) and dark count rate (DCR) superior to state-of-the-art Geiger-mode APDs, and with two orders of magnitude faster maximum count rate (MCR) will be developed. Geiger APDs are constrained by a fundamental tradeoff between DCR and MCR: if the APD is cooled to reduce DCR, then its dead time must increase to avoid afterpulsing, thereby reducing MCR. Linear APDs are not subject to this constraint, and so can be operated with dead times on the order of 250 ps. This improvement in MCR translates into a proportional improvement in single photon bit rate. Voxtel has previously demonstrated a multi-stage InGaAs APD design with high gain and low avalanche noise. In this effort, the dark count rate of the multi-stage APD will be improved by using InGaAsP gain stages to replace the existing oxygen-scavenging InAlAs materials. The improved multi-stage APDs will be demonstrated to have high gain (>1,000), low jitter (<20 ps), high saturation (>108 photon), and with low DCR (< 10 kHz) at temperatures >220 K, so that in Phase II, fully functional 32 × 32 LADAR arrays can fabricated and demonstrated.

* information listed above is at the time of submission.

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