Wide Field of View Narrowband Holographic Grating Array for Improved Spectral Filtering in High Altitude Antisubmarine Warfare Systems Navy SBIR FY2005.2 Sol No.: Navy SBIR FY2005.2 Topic No.: N05-119 Topic Title: Wide Field of View Narrowband Holographic Grating Array for Improved Spectral Filtering in High Altitude Antisubmarine Warfare Systems Proposal No.: N052-119-0005 Firm: RL Associates 4 Tanglewood Dr. Langhorne, Pennsylvania 19047 Contact: Mary Ludwig Phone: (610) 499-7530 Web Site: www.rlassociatesinc.com Abstract: RL Associates Inc. proposes to conduct a feasibility study leading to the development of a narrowband, wide field of view, volume holographic filter for high altitude Light Detection and Ranging (LIDAR) systems used in antisubmarine warfare (ASW). We propose a filter element composed of many individual volume holographic gratings, spatially separated to form an array, and arranged in such a way that their narrow individual fields of view complement each other to produce a wide field of view for the entire element. This new type of spectral filter composed of an array of volume holographic gratings can be tailored to a broad acceptance angle while maintaining extremely narrow spectral bandpass of 1 � or less. Diffraction efficiency of greater than 60% has been demonstrated by RL Associates in previous volume holographic filter work. Benefits: Development of a wide field of view, narrowband spectral filter based on a volume holographic grating array would benefit many areas outside of anti-submarine warfare systems, including filters for missile guidance systems, satellite-based multi-spectral imaging applications, satellite communications systems, and atmospheric LIDAR for climate predictions. Potential commercial applications include filters for commercially available LIDAR units. Return