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physics.optics2026
Upconversion Dual-comb Passive Spectroscopy of Mid-IR Incoherent Light
Mingchen Liu, Matthew Heyrich, Sichong Ma +1
We introduce cross-comb correlation spectroscopy, which correlates signals from asynchronous sum-frequency sampling of mid-IR incoherent light with two near-IR combs. We experiment…
physics.optics2024
Optical-parametric-amplification-enhanced background-free spectroscopy
Mingchen Liu, Robert M. Gray, Arkadev Roy +2
Traditional absorption spectroscopy has fundamental difficulty in resolving small absorbance from strong background due to the instability of laser sources. Existing background-fre…