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Chinese Physics B

Generation and storage of double slow light pulses in a solid

范云飞, 王海华, 王荣, 张晓军, 康智慧, 吴金辉, 张汉壮, 高锦岳

Published Jan 1, 2012• 0 citations
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Abstract

We experimentally study the generation and storage of double slow light pulses in a Pr～（3+）:Y2 SiO5 crystal.Under electromagnetically induced transparency,a single signal pulse is stored in the spin coherence of the crystal.By simultaneously switching on two control fields to recall the stored information,the spin coherence is converted into two slow light pulses with distinct frequencies.Furthermore,the storage and controlled retrieval of double slow light pulses are obtained by manipulating the control fields.This study of double slow light pulses may have practical applications in information processing and all-optical networks.

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We experimentally study the generation and storage of double slow light pulses in a Pr～（3+）:Y2 SiO5 crystal.Under electromagnetically induced transparency,a single signal pulse is stored in the spin coherence of the crystal.By simultaneously switching on two control fields to recall the stored information,the spin coherence is converted into two slow light pulses with distinct frequencies.Furthermore,the storage and controlled retrieval of double slow light pulses are obtained by manipulating the control fields.This study of double slow light pulses may have practical applications in information processing and all-optical networks.
We experimentally study the generation and storage of double slow light pulses in a Pr 3+ :Y 2 SiO 5 crystal. Under electromagnetically induced transparency, a single signal pulse is stored in the spin coherence of the crystal. By simultaneously switching on two control fields to recall the stored information, the spin coherence is converted into two slow light pulses with distinct frequencies. Furthermore, the storage and controlled retrieval of double slow light pulses are obtained by manipulating the control fields. This study of double slow light pulses may have practical applications in information processing and all-optical networks.
We experimentally demonstrate the slowing and storage of double light pulses in a Pr(3+):Y(2)SiO(5) crystal using a multilevel-tripod scheme. Owing to double dark-state polaritons of the tripod-type system, two signal pulses can be simultaneously slowed. Also, we realize the simultaneous storage (and retrieval) of double light pulses by switching off (and back on) the control field. Slowing and storage of double light pulses in solids may have practical applications in quantum information and quantum networks.
The authors experimentally demonstrated the optical information transfer between two frequencies channels based on electromagnetically induced transparency(EIT) in a four level double lambda system in Pr∶YSO crystal.Under the conditions of EIT,a weak probe pulse is slowed during the propagation in the crystal.A group velocity of 86 m/s is observed experimentally.By adiabatically switching off the control field,most of the probe pulse is stored in the sample.By switching on two control fields(with distinct frequencies and direction) in the release process,the stored optical information is distributed into two spatially-separated channels from the original slow light pulse with a single channel.By adjusting the two control fields in the release process,the information of slowed light pulse can be converted between the frequencies channels.
We experimentally demonstrate an all-optical routing based on light storage in a Pr3+:Y2SiO5 crystal. Under electromagnetically induced transparency, the optical information of the probe light pulse can be stored in the crystal. By simultaneously switching on two retrieve control fields in the release process, the stored optical information from one light channel can be distributed into two light channels. Such an all-optical routing in solids may have practical applications in quantum information and all-optical network.
We experimentally report on the preservation of transverse spatial coherence in the storage of double light pulses by using a solid. Under electromagnetically induced transparency, two probe pulses are stored into atomic coherence between ground-state levels and later retrieved. By analyzing the Young-type spatial interference patterns formed by two probe fields before and after the storage, we demonstrate that transverse spatial coherence of the probe fields is preserved in the storage process. This demonstration can be used for image processing and multiple information manipulation.
We experimentally demonstrate a three-channel all-optical routing based on light storage in a Pr(3+):Y(2)SiO(5) crystal. By switching off the control field under the condition of electromagnetically induced transparency, the optical information of the probe light pulse can be stored in the crystal. When three retrieve control fields are switched on in the release process, the stored optical information from one light channel can be transferred (or distributed) into three different light channels. Also we show that this all-optical routing can be time-delayed. Such a multichannel all-optical routing in solids may have practical applications in quantum information and all-optical network.