Shape-shifting Array for Military Underwater Sonar Navy SBIR FY2010.2 Sol No.: Navy SBIR FY2010.2 Topic No.: N102-181 Topic Title: Shape-shifting Array for Military Underwater Sonar Proposal No.: N102-181-0332 Firm: Physical Optics Corporation Information Technologies Division 20600 Gramercy Place, Bldg. 100 Torrance, California 90501-1821 Contact: Martin Lopez Phone: (310) 320-3088 Web Site: www.poc.com Abstract: To address the Navy's need for very compact high-powered underwater sonar transducer array for Anti-Submarine Warfare (ASW) and Counter-Torpedo Detection, Classification, and Localization (CTDCL) systems for the naval fleet, Physical Optics Corporation (POC) proposes to develop a new Shape-shifting Array for Military Underwater Sonar (SAMUS). This proposed device is based on a new transducer design (1 cm diameter, 3 cm long) utilizing a novel shape-memory materials (SMM) mechanism. The innovation in reducing transducer form factor will facilitate new designs in compact high-powered underwater sonar arrays (>214 dB re 1 microPa). As a result, this device offers a very compact high-powered underwater sonar transducer array (0.5 m length, 0.12 m diameter, <3 kg) capable of directional transmission (<10 degrees) with a high duty cycle, increased reliability (>20 yr), and lower manufacturing costs (<$1,200) which directly address the POM12 acquisition program requirements. In Phase I, POC will demonstrate the feasibility of SAMUS by demonstrating key components of the transducer element and constructing a notional paper design to predict performance and reliability. In Phase II, POC plans to fabricate a series of prototypes to validate predicted behavior in order to successfully construct a full prototype array. Benefits: The SAMUS device meets Navy requirements for a new, compact, low-cost high-powered underwater sonar transducer array. Unlike existing ASW and CTDCL systems, SAMUS can increase transmission bandwidths and beamforming resolution to fill a current capability gap. Potential commercial applications include use in a mission-accommodating modular sensor platform for scientific studies such as ocean condition monitoring, sea life tracking and detection, and shipwreck exploration. Return