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

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE

Superluminal light propagation in optical amplifiers based on diode-pumped Nd:YVO 4 crystal

Andrey P. Zinoviev, R. A. Panov, Anton Novikov, Oleg L. Antipov

Published Feb 10, 2006• 2 citations
Publisher

Abstract

The group velocity of an optical pulse in an optical amplifier in the presence of population oscillations was studied both theoretically and experimentally. The superluminal propagation of harmonically modulated light was measured in a diode-pumped Nd:YVO4 crystal. The resonant phase shift was found to have resonance at the frequency of population relaxation.

DOI
10.1117/12.675557

Related papers

Superluminal light propagation through a diode-pumped Nd:YVO4crystal

R. A. Panov, Anton Novikov, Andrey P. Zinoviev +1 more

The group velocity of optical pulse in an amplifier in the presence of population oscillations was studied both theoretically and experimentally. The superluminal propagation of harmonically modulated light was measured in a diode-pumped Nd:YVO4crystal.

Quantum Electronics and Laser Science Conference•Dec 10, 2005•0 citations

Superluminal light propagation through adiode-pumped Nd:YVO4crystal

Andrey P. Zinoviev, Nizhny Novgorod

Thegroupvelocity ofoptical pulse inanamplifier inthepresence ofpopulation oscillations wasstudied boththeoretically andexperimentally. Thesuperluminal propagation of harmonically modulated light wasmeasured inadiode-pumped Nd:YVO4 crystal. ©2005 Optical Society ofAmerica OCIScodes: (190.5530) Pulse propagation andsolitons, (140.3280) Laser amplifier

•Jan 1, 2005•0 citations

Emission of a spatially modulated resonant medium excited with superluminal velocity

Mikhail V. Arkhipov, Rostislav M. Arkhipov, Yu. A. Tolmachev

Specific characteristics of the radiation of a resonant medium excited by an ultrashort light pulse propagating through the medium with a superluminal velocity are considered. The medium is assumed to consist of identical linear harmonic oscillators with a spatial density periodically modulated along the direction of propagation of the superluminal excitation. The field of radiation of the resonant medium under these conditions is calculated. It is shown that, under the superluminal excitation, the radiation spectrum of the medium shows, along with the fundamental frequency of the oscillators, new frequencies that depend on the spatial frequency of the distribution of oscillators and on the angle of observation. Possible application of the effect is discussed.

Optics and Spectroscopy•Feb 1, 2012•12 citations

Superluminal pulse propagation in linear and nonlinear photonic grating structures

Stefano Longhi, Marcello Marano, M. Belmonte +1 more

Optical pulse propagation in photonic grating structures can show anomalous (i.e., superluminal or negative) group velocities under certain circumstances owing to the anomalous dispersive properties induced by the periodic grating structure. Such phenomena can be observed for either linear pulse propagation in passive dielectric grating structures, such as in fiber Bragg gratings (FBGs), as well as in frequency-conversion processes exploiting second-order cascading effects in quasi-phase-matched (QPM) nonlinear crystals. Engineering of the grating structure can be exploited to observe a wide variety of anomalous pulse transmission and reflection behaviors. In this article, we review the main recent experimental and theoretical achievements obtained by our group in this field. In particular, we report on superluminal propagation of picosecond optical pulses at the 1.5-μm wavelength of optical communications in FBGs, both in transmission and reflection configurations, with the observation of group velocities as large as ∼5c/sub 0/. We also show that the phenomenon of transparent pulse propagation at a negative group velocity in a gain doublet atomic amplifier, recently observed in cesium vapor by Wang and co-workers (L. J. Wang, A. Kuzmich, and A. Dogariu, Nature vol.406, p.277-9, 2000), can be achieved as well in a photonic parametric amplifier by exploiting the anomalous dispersive properties of the amplifier induced by a suitably designed QPM grating profile.

IEEE Journal of Selected Topics in Quantum Electronics•Jan 1, 2003•37 citations

Phase tunability of group velocity by modulated-pump-forced coherent population oscillations

Francisco Arrieta-Yáñez, Sonia Melle, Óscar G. Calderón +2 more

We propose a technique to obtain slow and fast light propagations based on coherent population oscillations forced by a modulated pump. This mechanism produces an enhancement of 1 order of magnitude of the delay or advancement of light signals. The relative phase between the pumps to the signal fields is used as a knob for changing light propagation from ultraslow group velocities to negative group velocities. The experimental realization of the phenomenon was carried out in an erbium-doped fiber amplifier at room temperature.

Physical Review A•Jul 17, 2009•12 citations

Superluminal and slow light propagation in cold atoms

Hoonsoo Kang, Gessler Hernandez, Yifu Zhu

The group velocity of a light pulse propagating through a four-level system exhibiting electromagnetically induced transparency can be manipulated by a pump laser. The pump laser induces the large optical nonlinearities with steep normal or anomalous dispersion. We present experimental measurements that demonstrate both slow and superluminal light propagation in cold Rb atoms.

Physical Review A•Jul 7, 2004•76 citations
The group velocity of an optical pulse in an optical amplifier in the presence of population oscillations was studied both theoretically and experimentally. The superluminal propagation of harmonically modulated light was measured in a diode-pumped Nd:YVO4 crystal. The resonant phase shift was found to have resonance at the frequency of population relaxation.
Specific characteristics of the radiation of a resonant medium excited by an ultrashort light pulse propagating through the medium with a superluminal velocity are considered. The medium is assumed to consist of identical linear harmonic oscillators with a spatial density periodically modulated along the direction of propagation of the superluminal excitation. The field of radiation of the resonant medium under these conditions is calculated. It is shown that, under the superluminal excitation, the radiation spectrum of the medium shows, along with the fundamental frequency of the oscillators, new frequencies that depend on the spatial frequency of the distribution of oscillators and on the angle of observation. Possible application of the effect is discussed.
Optical pulse propagation in photonic grating structures can show anomalous (i.e., superluminal or negative) group velocities under certain circumstances owing to the anomalous dispersive properties induced by the periodic grating structure. Such phenomena can be observed for either linear pulse propagation in passive dielectric grating structures, such as in fiber Bragg gratings (FBGs), as well as in frequency-conversion processes exploiting second-order cascading effects in quasi-phase-matched (QPM) nonlinear crystals. Engineering of the grating structure can be exploited to observe a wide variety of anomalous pulse transmission and reflection behaviors. In this article, we review the main recent experimental and theoretical achievements obtained by our group in this field. In particular, we report on superluminal propagation of picosecond optical pulses at the 1.5-μm wavelength of optical communications in FBGs, both in transmission and reflection configurations, with the observation of group velocities as large as ∼5c/sub 0/. We also show that the phenomenon of transparent pulse propagation at a negative group velocity in a gain doublet atomic amplifier, recently observed in cesium vapor by Wang and co-workers (L. J. Wang, A. Kuzmich, and A. Dogariu, Nature vol.406, p.277-9, 2000), can be achieved as well in a photonic parametric amplifier by exploiting the anomalous dispersive properties of the amplifier induced by a suitably designed QPM grating profile.
We propose a technique to obtain slow and fast light propagations based on coherent population oscillations forced by a modulated pump. This mechanism produces an enhancement of 1 order of magnitude of the delay or advancement of light signals. The relative phase between the pumps to the signal fields is used as a knob for changing light propagation from ultraslow group velocities to negative group velocities. The experimental realization of the phenomenon was carried out in an erbium-doped fiber amplifier at room temperature.