Compressive multi-heterodyne optical spectroscopy
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Updated: May 15, 2026

Multiplex Chemical Imaging Based on Broadband Stimulated Raman Scattering Microscopy
Published on: July 25, 2022
Nikhil Mehta1, Jingbiao Chen, Zhigang Zhang
1Department of Electrical Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, USA. nnm114@psu.edu
Abstract:
We propose a framework for Compressive Multi-heterodyne Optical Spectroscopy [CMOS], based on multiple heterodyne measurements of an optical signal mixed with a dynamically encoded frequency comb. The sparsity of optical spectra of interest is exploited by using the compressive sensing strategy to significantly reduce the number of heterodyne measurements. Numerical results are presented to demonstrate retrieval of coherent and incoherent hypothetical singly resonant sparse spectra over a 2 THz-wide bandwidth, sampled every 100 MHz, by using less than 50% measurements.
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