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

Optics Express

All-optical image switching in a double-Λ system

Bongjune Kim, Cha‐Hwan Oh, Byoung‐Uk Sohn, Do‐Kyeong Ko, Hyung Tak Kim, Changsoo Jung, Myoung-Kyu Oh, Nan Ei Yu, Bok Hyeon Kim, Hoonsoo Kang

Published Jun 7, 2013• 7 citations
Publisher

Abstract

The coherent control of optical images has garnered attention because all information embedded in optical images is expected to be controlled in a parallel way. One of the most important control processes is switch for information delivery. We experimentally demonstrated phase-controlled optical image switching in a double-Λ system where the transmission of the image through a medium was switched. Two independent laser sources were adopted for a double-Λ system such that images inscribed in two weak probe light beams were incoherent with each other. Arbitrary phase was added to the optical images to show that switching could be accomplished just with the relative phase difference between the probe pixels.

DOI
10.1364/oe.21.014215

Related papers

Phase controlled switching between incoherent optical images in a double Λ system

Bongjune Kim, Young‐Ho Park, Byoung‐Uk Sohn +3 more

The coherent control of optical images has garnered attention because the range of information embedded in optical images is expected to be controlled in high efficiency. Recently, the storage of optical images using coherent control techniques opened a method for multiple information storage. Image control in coherent medium might move up new era of quantum information technology since the generation of entangled image pairs was realized with parametric process in coherent medium. One of the most important optical controls is switch for information distribution. Here, phase-controlled optical image switching with low light intensity was demonstrated in a double-Λ system. Switching by interference in a double-Λ system was observed as having a 90 % switching depth between incoherent image pixels. Two independent laser sources were adopted for a double-Λ system such that images inscribed in two weak probe lights were incoherent with each other.

Research in Optical Sciences•Jan 1, 2012•0 citations

Phase-controlled switching by interference between incoherent fields in a double-Λ system

Hoonsoo Kang, Bongjune Kim, Young‐Ho Park +2 more

We showed experimentally interference could be occurred between incoherent lights in a double-Λ lambda transition implemented with rubidium atomic vapor. Switching of probe transmission was controlled by the phases of two` independent probe lasers with low light intensity. More than 70% of the probe transmission could be switched by ultra-weak incoherent field. We suggested optically cryptic information could be delivered by the phase-controlled switching with incoherent fields in a double-Λ system.

Optics Express•Feb 16, 2011•14 citations

Phase-controlled switching by interference between incoherent fields in a double-Λ system

Hoonsoo Kang, Bongjune Kim, Young‐Ho Park +2 more

We showed experimentally interference could be occurred between incoherent lights in a double- lambda transition implemented with rubidium atomic vapor. Switching of probe transmission was controlled by the phases of two independent probe lasers with low light intensity. More than 70 % of the probe transmission could be switched by ultra-weak incoherent field. We suggested optically cryptic information could be delivered by the phase-controlled switching with incoherent fields in a double-Λ system.

•Jan 1, 2011•0 citations

Anticorrelated light switching in an optical loop system

Bongjune Kim, Byoung‐Uk Sohn, Woojin Shin +2 more

We have demonstrated anticorrelated light switching between multiphoton transition channels in a nonresonant double-Λ system. Two-color probe transitions, using rubidium D1 (795 nm) and D2 (780 nm), were included in our double-Λ system. In anticorrelated light switching, one of two probe transitions is selected as transparent while the other is selected as opaque. In this configuration, we observed completely different behavior from that seen in a resonant double-Λ system, in which both probe transmissions are transparent or opaque simultaneously. Furthermore, we observed a noise correlation between two-color probe transmissions when the phase fluctuation of the two probe lasers was converted to the intensity fluctuation. The relative phase fluctuation between the two probe lasers induced an anticorrelation between the intensity noises of two probe lasers in a nonresonant double-Λ system, while a correlation was induced in a resonant double-Λ system. The intensity fluctuation (correlated or anticorrelated) was easily controlled by detuning the double-Λ system. The noise anticorrelation effect is clearly interpreted as arising from the anticorrelated light switching in a nonresonant double-Λ system. This system can be used for noise control as well as optical switching between incoherent two-color laser lights.

Journal of the Optical Society of America B•Jan 9, 2015•3 citations

Technique of quantum-state transfer for a double- Λ atomic beam

Xiong-Jun Liu, Hui Jing, Xiao-Ting Zhou +1 more

We theoretically examine the quantum-state transfer process from light to a continuous atom laser by extending the original Fleischhauer-Gong scheme [M. Fleischhauer and S. Gong, 88, 070404 (2002)] to a double-$\ensuremath{\Lambda}$ atomic system. We find that the intensity of the output matter waves is controlled by the relative phase of two coherent probe lights, which may provide an interesting method for the measurement of the initial relative phase of two independent light sources.

arXiv:quant-ph/0401014•Physical Review A•Jul 26, 2004•17 citations

Phase-dependent light switching in triple-Λ system

Byoung‐Uk Sohn, Bongjune Kim, Do‐Kyeong Ko +1 more

We theoretically studied a triple-Λ system comprising three pairs of coupling-probe fields. Three probe fields were phase-dependently switched with a switching depth above 80%, at which the group-velocity matching of all probe pulses was available under slow light-propagation conditions. We considered the probe susceptibility as the superposition of three-photon transitions to systematically understand the multi-photon interference in a triple-Λ system, which can be applied to systems with N−Λ (N≥1). This helped us to tailor the probe susceptibility by adjusting the detuning and phases of the coupling and probe fields. This work can be applied to all-optical switching gates for triple-photons and can enhance the speed of processing optical information.

Journal of the Optical Society of America B•Jun 2, 2015•0 citations
The coherent control of optical images has garnered attention because all information embedded in optical images is expected to be controlled in a parallel way. One of the most important control processes is switch for information delivery. We experimentally demonstrated phase-controlled optical image switching in a double-Λ system where the transmission of the image through a medium was switched. Two independent laser sources were adopted for a double-Λ system such that images inscribed in two weak probe light beams were incoherent with each other. Arbitrary phase was added to the optical images to show that switching could be accomplished just with the relative phase difference between the probe pixels.
The coherent control of optical images has garnered attention because the range of information embedded in optical images is expected to be controlled in high efficiency. Recently, the storage of optical images using coherent control techniques opened a method for multiple information storage. Image control in coherent medium might move up new era of quantum information technology since the generation of entangled image pairs was realized with parametric process in coherent medium. One of the most important optical controls is switch for information distribution. Here, phase-controlled optical image switching with low light intensity was demonstrated in a double-Λ system. Switching by interference in a double-Λ system was observed as having a 90 % switching depth between incoherent image pixels. Two independent laser sources were adopted for a double-Λ system such that images inscribed in two weak probe lights were incoherent with each other.
We showed experimentally interference could be occurred between incoherent lights in a double-Λ lambda transition implemented with rubidium atomic vapor. Switching of probe transmission was controlled by the phases of two` independent probe lasers with low light intensity. More than 70% of the probe transmission could be switched by ultra-weak incoherent field. We suggested optically cryptic information could be delivered by the phase-controlled switching with incoherent fields in a double-Λ system.
We showed experimentally interference could be occurred between incoherent lights in a double- lambda transition implemented with rubidium atomic vapor. Switching of probe transmission was controlled by the phases of two independent probe lasers with low light intensity. More than 70 % of the probe transmission could be switched by ultra-weak incoherent field. We suggested optically cryptic information could be delivered by the phase-controlled switching with incoherent fields in a double-Λ system.
We have demonstrated anticorrelated light switching between multiphoton transition channels in a nonresonant double-Λ system. Two-color probe transitions, using rubidium D1 (795 nm) and D2 (780 nm), were included in our double-Λ system. In anticorrelated light switching, one of two probe transitions is selected as transparent while the other is selected as opaque. In this configuration, we observed completely different behavior from that seen in a resonant double-Λ system, in which both probe transmissions are transparent or opaque simultaneously. Furthermore, we observed a noise correlation between two-color probe transmissions when the phase fluctuation of the two probe lasers was converted to the intensity fluctuation. The relative phase fluctuation between the two probe lasers induced an anticorrelation between the intensity noises of two probe lasers in a nonresonant double-Λ system, while a correlation was induced in a resonant double-Λ system. The intensity fluctuation (correlated or anticorrelated) was easily controlled by detuning the double-Λ system. The noise anticorrelation effect is clearly interpreted as arising from the anticorrelated light switching in a nonresonant double-Λ system. This system can be used for noise control as well as optical switching between incoherent two-color laser lights.
We theoretically examine the quantum-state transfer process from light to a continuous atom laser by extending the original Fleischhauer-Gong scheme [M. Fleischhauer and S. Gong, 88, 070404 (2002)] to a double-$\ensuremath{\Lambda}$ atomic system. We find that the intensity of the output matter waves is controlled by the relative phase of two coherent probe lights, which may provide an interesting method for the measurement of the initial relative phase of two independent light sources.
We theoretically studied a triple-Λ system comprising three pairs of coupling-probe fields. Three probe fields were phase-dependently switched with a switching depth above 80%, at which the group-velocity matching of all probe pulses was available under slow light-propagation conditions. We considered the probe susceptibility as the superposition of three-photon transitions to systematically understand the multi-photon interference in a triple-Λ system, which can be applied to systems with N−Λ (N≥1). This helped us to tailor the probe susceptibility by adjusting the detuning and phases of the coupling and probe fields. This work can be applied to all-optical switching gates for triple-photons and can enhance the speed of processing optical information.