Compact, Low Cost APD Arrays with Built-in Optical Amplification

Award Information
Agency: National Aeronautics and Space Administration
Branch: N/A
Contract: NNG04CA72C
Agency Tracking Number: 034738
Amount: $69,594.00
Phase: Phase I
Program: SBIR
Awards Year: 2004
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
1450 South Rolling Road, Baltimore, MD, 21227
DUNS: 171899719
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Ayub Fathimulla
 Principal Investigator
 (410) 455-5830
Business Contact
 Leye Aina
Title: Business Official
Phone: (410) 455-5594
Research Institution
The overall goal of the proposed program by Epitaxial Technologies is to develop a compact, low-cost, low power, low noise and ultra-sensitive Avalanche Photo Diode (APD) arrays with built-in optical pre-amplification (in addition to internal electrical gain) and having a fill factor and bandwidth of 90% and 5.0 GHz respectively. We will accomplish this by developing novel APD structures and integrating the APDs with vertical cavity semiconductor optical amplifiers (VCSOAs). In Phase I of this project, we will design, model and simulate the performance of the APD arrays with built-in optical pre-amplification having -47 dBm sensitivity and lower noise than existing APD operating at 1550 nm. We will design and fabricate the 4 x 4 photodetector array with internal optical gain of 20 dB and assess its performance. In Phase II, we will design, fabricate and test the 256 x 256 arrays along with monolithic photoreceivers using detectors having built-in optical preamplifier and internal gain. In particular, we will combine photodetector arrays having built-in optical preamplifier with the Readout Integrated Circuits (ROIC) using an innovative bonding technique at the wafer level, in order to demonstrate single photon counting by operating in the Geiger-mode for solid state imaging LADAR receivers.

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

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