Lidar-radar heterodyne receiver for underwater imaging applications

Award Information
Agency: Department of Defense
Branch: Navy
Contract: N68335-08-C-0190
Agency Tracking Number: N081-032-0469
Amount: $79,999.00
Phase: Phase I
Program: SBIR
Awards Year: 2008
Solicitation Year: 2008
Solicitation Topic Code: N08-032
Solicitation Number: 2008.1
Small Business Information
44 Hunt Street, Watertown, MA, 02472
DUNS: 073804411
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Madhavi Seetamraju
 Principal Investigator
 (617) 668-6824
Business Contact
 Gerald Entine
Title: President
Phone: (617) 668-6800
Research Institution
High spatial resolution, LIDAR images of underwater targets from air and submersed platforms are plagued by poor signal-to-noise ratios (SNR), arising from strong scattering in the turbid media of seawater. A hybrid system that combines the detection and coherent signal processing techniques of conventional RADAR with the optical propagation characteristics of LIDAR improves target detectability and image contrast. For this application the receiver should have a good response at the RF modulation frequency of 1 GHz and a large dynamic range to detect return signals from deep targets in highly scattering waters. Radiation Monitoring Devices, Inc. (RMD) proposes to develop an avalanche photodiode (APD) based receiver system to increase the SNR by at least ten fold and the dynamic range by more than 20 dB over existing PMT based receiver modules. The novel receiver will operate on gain modulation and heterodyne detection techniques in order to offer improved system response at the required high modulation frequency (~1 GHz). By leveraging previous experience with high performance receiver systems, RMD's highly qualified research team will design, fabricate and deliver an APD-based receiver module with ~ 1 GHz bandwidth, ~ 60dB dynamic range and a superior SNR to NAVAIR for evaluation.

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

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