Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Conference on Lasers and Electro-Optics

A tunable source from the visible to deep ultraviolet generated by molecular modulation in room temperature hydrogen

Wei-Jan Chen, A. H. Kung

Published Jan 1, 2006• 0 citations
Publisher

Abstract

The beating of a tunable UV laser with a strongly driven vibrational Raman coherence in H2efficiently produces a beam of broadly tunable coherent light with a 50% total energy conversion to the new wavelengths.
DOI
10.1109/cleo.2006.4628892

Related papers

RESONANTLY ENHANCED, NONLINEAR GENERATION OF TUNABLE, COHERENT, VACUUM ULTRAVIOLET (VUV) LIGHT IN ATOMIC VAPORS*

P. P. Sorokin, James J. Wynne, John A. Armstrong +1 more

Annals of the New York Academy of Sciences•Jan 1, 1976•42 citations

Tunable deep-ultraviolet source generated by scattering off adiabatically prepared Raman coherence in hydrogen gas

Wei-Jan Chen, A. H. Kung

We demonstrate a tunable deep-ultraviolet coherent source generated by the beating of a tunable UV laser and strongly driven vibrational Raman coherence in hydrogen. The total energy conversion efficiency reaches a maximum of 50% at the phase side of the Raman coherence. The generated spectrum of Raman sidebands tunes with the input and extends from 435 to 146 nm for an input at 282 nm.

Optics Letters•Oct 1, 2005•5 citations

Vibrational molecular modulation in hydrogen

Shu Wei Huang, Wei-Jan Chen, A. H. Kung

Detailed numerical modeling of using the vibrational coherence of ${\mathrm{H}}_{2}$ for molecular modulation is presented. The focus of the calculation is on a strongly driven system aimed at producing many sidebands in the presence of Doppler broadening and the effects of collisions at room temperature. It is shown that Dicke narrowing that reduces the Doppler width plays a critical role in high order sideband generation in room temperature ${\mathrm{H}}_{2}$. In addition, the calculation shows that generation of many sidebands favors the phased state as has been reported in all gas phase experiments and is primarily a consequence of the Stark shifts that result from the applied high intensities. The influence of self-focusing in the gas medium that has been conjectured in previous studies is only secondary. The numerical results agree with experimental data obtained in our laboratory, where we have succeeded in generating collinearly propagating Raman sidebands with wavelengths that range from $2216\phantom{\rule{0.3em}{0ex}}\mathrm{nm}$ in the infrared to $133\phantom{\rule{0.3em}{0ex}}\mathrm{nm}$ in the vacuum ultraviolet. The frequencies covered by these sidebands span over four octaves for a total of more than $70\phantom{\rule{0.2em}{0ex}}600\phantom{\rule{0.3em}{0ex}}{\mathrm{cm}}^{\ensuremath{-}1}$ in the optical region of the spectrum.

Physical Review A•Dec 26, 2006•17 citations

Generation of a coherent molecular beam from an atom laser

Brian Seaman

APS•Apr 1, 2003•0 citations

A spectrally bright wavelength-switchable vacuum ultraviolet source driven by quantum coherence in strong-field-ionized molecules

Yuexin Wan, Zhaoxiang Liu, Jinping Yao +6 more

Abstract We report generation of spectrally bright vacuum ultraviolet (VUV) and deep UV (DUV) coherent radiations at the wavelengths of 192 nm, 198 nm and 204 nm. These DUV/VUV radiations originate from resonant four-wave mixing assisted by quantum coherence in tunnel-ionized CO molecules. The electronic coherence is created when the pump pulses resonantly excite electronic transitions of CO+. The technique allows for the selective switch of DUV/VUV wavelengths provided by the abundant energy levels of molecular ions. The developed source can have arbitrary polarization states by manipulating the polarization of the pump pulse. It also exhibits a spectral bandwidth of 5∼7 cm−1, a divergence angle of 3∼5 mrad, a pulse duration of ∼10 ps, and a photon flux of ∼1010 photons/s. The superior temporal and spectral properties give rise to a broadband Raman comb in the DUV/VUV region.

arXiv:2007.11900•New Journal of Physics•Jan 21, 2021•6 citations

Coherent Raman light conversion in a two-level medium

Alexander A. Zabolotskii

Journal of Experimental and Theoretical Physics•Jul 1, 1987•1 citation
Detailed numerical modeling of using the vibrational coherence of H2{\mathrm{H}}_{2}H2​ for molecular modulation is presented. The focus of the calculation is on a strongly driven system aimed at producing many sidebands in the presence of Doppler broadening and the effects of collisions at room temperature. It is shown that Dicke narrowing that reduces the Doppler width plays a critical role in high order sideband generation in room temperature H2{\mathrm{H}}_{2}H2​. In addition, the calculation shows that generation of many sidebands favors the phased state as has been reported in all gas phase experiments and is primarily a consequence of the Stark shifts that result from the applied high intensities. The influence of self-focusing in the gas medium that has been conjectured in previous studies is only secondary. The numerical results agree with experimental data obtained in our laboratory, where we have succeeded in generating collinearly propagating Raman sidebands with wavelengths that range from 2216nm2216\phantom{\rule{0.3em}{0ex}}\mathrm{nm}2216nm in the infrared to 133nm133\phantom{\rule{0.3em}{0ex}}\mathrm{nm}133nm in the vacuum ultraviolet. The frequencies covered by these sidebands span over four octaves for a total of more than $70\phantom{\rule{0.2em}{0ex}}600\phantom{\rule{0.3em}{0ex}}{\mathrm{cm}}^{\ensuremath{-}1}$ in the optical region of the spectrum.
Abstract We report generation of spectrally bright vacuum ultraviolet (VUV) and deep UV (DUV) coherent radiations at the wavelengths of 192 nm, 198 nm and 204 nm. These DUV/VUV radiations originate from resonant four-wave mixing assisted by quantum coherence in tunnel-ionized CO molecules. The electronic coherence is created when the pump pulses resonantly excite electronic transitions of CO+. The technique allows for the selective switch of DUV/VUV wavelengths provided by the abundant energy levels of molecular ions. The developed source can have arbitrary polarization states by manipulating the polarization of the pump pulse. It also exhibits a spectral bandwidth of 5∼7 cm−1, a divergence angle of 3∼5 mrad, a pulse duration of ∼10 ps, and a photon flux of ∼1010 photons/s. The superior temporal and spectral properties give rise to a broadband Raman comb in the DUV/VUV region.