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Development of a CMOS active-pixel phase-sensitive detector imaging array

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Abstract

Single-point laser diagnostics use various electronic signal-processing techniques to improve signal-to-noise ratios (SNR). These include simple signal averaging, gated integration (boxcar averaging) for pulsed systems, and phase sensitive detection (lock-in amplification) for modulated cw systems. An ongoing program at the Colorado School of Mines (CSM) has evaluated methods for implementation of electronic signal processing in imaging arrays (see e.g. Fisher1 for a gated-integrator array). Here we describe the development of a new imaging array that performs phase-sensitive detection signal processing at the chip level, at each pixel.

© 2002 Optical Society of America

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