2020
DOI: 10.1364/oe.405767
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Covariance spectroscopy of molecular gases using fs pulse bursts created by modulational instability in gas-filled hollow-core fiber

Abstract: We present a technique that uses noisy broadband pulse bursts generated by modulational instability to probe nonlinear processes, including infrared-inactive Raman transitions, in molecular gases. These processes imprint correlations between different regions of the noisy spectrum, which can be detected by acquiring single shot spectra and calculating the Pearson correlation coefficient between the different frequency components. Numerical simulations verify the experimental measurements and are used to furthe… Show more

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Cited by 3 publications
(1 citation statement)
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“…The mean-value detection is intrinsically blind to the information contained in the noise. We have previously demonstrated a paradigmatically different framework in which the noise is seen as an asset rather than a liability in order to access information the mean-value misses 30 , and similar schemes have also recently been reported 31 , 32 . In our initial demonstration, we resolved the impulsive-stimulated Raman scattering (ISRS) spectrum of quartz using a single-beam experiment.…”
Section: Introductionmentioning
confidence: 95%
“…The mean-value detection is intrinsically blind to the information contained in the noise. We have previously demonstrated a paradigmatically different framework in which the noise is seen as an asset rather than a liability in order to access information the mean-value misses 30 , and similar schemes have also recently been reported 31 , 32 . In our initial demonstration, we resolved the impulsive-stimulated Raman scattering (ISRS) spectrum of quartz using a single-beam experiment.…”
Section: Introductionmentioning
confidence: 95%