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

Period of Performance: 01/01/2004 - 12/31/2004

$69.6K

Phase 1 SBIR

Recipient Firm

Epitaxial Technologies, LLC
1450 South Roling Road
Baltimore, MD 21227
Principal Investigator
Firm POC

Abstract

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.