Abstract: Optical Dynamic range compression (ODRC) is a new nonlinear signal processing concept that reshapes the dynamic range and signal-to-noise ratio.
ODRC improves the detection sensitivity by boosting weak signals over the noise floor, while keeping the full-scale the same. Without requiring an optical receiver that has post-amplification or higher resolution, the detectable range is extended. For signals whose amplitude distribution is centered at a low value, ODRC effectively reduces the quantization error by assigning more quantization levels to weak signals, reducing the total number of bits to digitize. In amplifiers cascade, a low-noise ODRC serving as the pre-amplifier would relax the noise figure and linear range requirements of the second amplifier.
Yunshan Jiang and Bahram Jalali, "Optical dynamic range compression (Conference Presentation)," Proc. SPIE 10517, Real-time Measurements, Rogue Phenomena, and Single-Shot Applications III, 105170I (Presented at SPIE LASE: January 29, 2018; Published: 14 March 2018); https://doi.org/10.1117/12.2288622.5751416210001.
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