Photon Counting Chirped Amplitude Modulation Ladar
Abstract
This work developed a method using Geiger-mode avalanche photodiode (GM-APD) photon counting detectors in the U.S. Army Research Laboratory's chirped amplitude modulation (AM) ladar receiver to yield sensitivities approaching the shot noise limit. Such sensitivities represent about four orders-of-magnitude improvement over the sensitivities of the currently used unity-gain, opto-electronic mixing metal-semiconductor-metal detectors. These sensitivity improvements may enable very compact, low power, eye-safe, and/or long-range ladars with low cost, low bandwidth readout integrated circuits for foliage and camouflage penetration, target ID, manned and unmanned ground and air vehicle navigation, three-dimensional face recognition, battle damage assessment, and change detection. Variants of the chirped AM ladar using a GM-APD that is experimentally assembled and tested and the benefits of new single photon counting detector products to the chirped AM ladar architecture are discussed.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 2008
- Accession Number
- ADA478348
Entities
People
- Barry L. Stann
- Brian C. Redman
Organizations
- United States Army Research Laboratory