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5 May 2009 Hybrid lidar radar receiver for underwater imaging applications
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Abstract
In this work, we present research performed to improve the receiver characteristics for underwater imaging applications using the hybrid lidar-radar detection technique. We report the development of the next-generation coherent heterodyne receiver using modulation of the optical receiver's amplifier gain. Significant advantages in the receiver specifications are achieved using a large-area, high gain, low-noise silicon avalanche photodiode (APD) as the photodetector cum frequency mixer-demodulator. We demonstrate that heterodyne detection by gain modulation of APD can be used to increase the signal-to-noise ratio, detection sensitivity and bandwidth for the hybrid receiver system.
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Madhavi Seetamraju, Rajan Gurjar, Michael Squillante, and Jeffrey P. Derderian "Hybrid lidar radar receiver for underwater imaging applications", Proc. SPIE 7306, Optics and Photonics in Global Homeland Security V and Biometric Technology for Human Identification VI, 73061Q (5 May 2009); https://doi.org/10.1117/12.820246
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