Scan-less hyperspectral dual-comb single-pixel-imaging in both amplitude and phase

Abstract

We have developed a hyperspectral imaging scheme that involves a combination of dual-comb spectroscopy and Hadamard-transform-based single-pixel imaging. The scheme enables us to obtain 12,000 hyperspectral images of amplitude and phase at a spatial resolution of 46 um without mechanical scanning. The spectral resolution is 20 MHz, as determined by the linewidth of a single comb mode, and the spectral interval is 100 MHz over a spectral range of 1.2 THz centred at 191.5 THz. As an initial demonstration of our scheme, we obtained spectroscopic images of a standard test chart through an etalon plate. The thickness of an absorptive chromium-coated layer on a float-glass substrate was determined to be 70 nm from the hyperspectral phase images in the near-infrared wavelength region.

arXiv comment19 pages, 6figures

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• Cavity-enhanced dual-comb spectroscopy
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• Spectroscopy of the Methane ν3 Band with an Accurate Mid-Infrared Coherent Dual- Comb Spectrometer
• Adaptive dual-comb spectroscopy in the green region
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Cited by in corpus (5)

• Scan-less confocal phase microscopy based on dual comb spectroscopy of two-dimensional-image-encoding optical frequency comb
• Dual-comb interferometry via repetition-rate switching of a single frequency comb
• Refractive index sensing with temperature compensation by a multimode-interference fiber-based optical frequency comb sensing cavity
• Domino successive-deviation ghost imaging
• Lock-in-detection dual-comb spectroscopy