Low-light-level all-optical switching

Chang Yi Wang, Yong Fan Chen, Sheng Chiun Lin, Wei Hsun Lin, Pei Chen Kuan, Ite A. Yu

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)


We propose an all-optical switch that utilizes the technique of storage and retrieval of light pulses. A single photon (probe pulse) switched by another (switching pulse) is feasible, and the on-off ratio can be as large as 10 dB. We have experimentally demonstrated that the energy of the retrieved probe pulse is reduced to about 10% because of the presence of a switching pulse with an energy per unit area of one photon per λ2/(2π). The achieved result does not depend on the coupling intensity, the atomic optical density, or the width and shape of the switching pulse.

Original languageEnglish
Pages (from-to)2350-2352
Number of pages3
JournalOptics Letters
Issue number15
Publication statusPublished - 2006 Aug 1

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics


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