Low-Noise, Wide-Bandwidth, Large-Area APDs for Free-Space Optical Links

Award Information
Agency: Department of Defense
Branch: Air Force
Contract: F29601-03-M-0113
Agency Tracking Number: F031-0339
Amount: $99,838.00
Phase: Phase I
Program: SBIR
Awards Year: 2003
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
600 Pine Ave., Santa Barbara, CA, 93117
DUNS: 040590700
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Clint Schow
 Engineer
 (805) 690-1718
 cschow@agility.com
Business Contact
 James Haynes
Title: Chief Operating Officer
Phone: (805) 690-1770
Email: jhaynes@agility.com
Research Institution
N/A
Abstract
For future satellite to ground optical links, large-area high-performance photodetectors are a key component. The APD is a natural choice, owing to its inherent sensitivity advantage compared to photodetectors that do not provide internal gain. Theoutput of Phase I of this program is an APD design that achieves 3 GHz of bandwidth, a quantum efficiency greater than 50%, and noise performance comparable to silicon APDs, with a light sensitive diameter of 200 mm. In order to achieve these performancetargets, Impact Ionization Engineering (I2E) will be used to incorporate an optimized InAlAs multiplication structure within a large area device. APDs designed for telecommunications applications incorporating these I2E InAlAs multiplication layers haveachieved the lowest noise and highest gain-bandwidth product ever reported for any APD technology. Agility has an exclusive license to these low-noise structures and is therefore uniquely positioned to both successfully complete Phase I with a viabledesign and to implement the design by building APDs in Phase II that meet the program performance goals. Successfully designing a large area APD that meets the objectives of this SBIR will yield a device that not only facilitates space to groundcommunication, but also will find wide commercial applications in instrumentation as well as other space, avionics, and terrestrial free-space optical communications where large-area wide-bandwidth detector technologies currently do not exist.

* Information listed above is at the time of submission. *

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