Photon echo without a free induction decay in a double-Λ system

Sarah E. Beavan; Patrick M. Ledingham; Jevon J. Longdell; Matthew J. Sellars

doi:10.1364/OL.36.001272

Photon echo without a free induction decay in a double-Λ system

Sarah E. Beavan, Patrick M. Ledingham, Jevon J. Longdell, Matthew J. Sellars

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15 Citations (Scopus)

Abstract

We have characterized a novel photon-echo pulse sequence for a double-Λ-type energy level system where the input and rephasing transitions are different from the applied π pulses. We show that, despite having imperfect π-pulses associated with large coherent emission due to free induction decay (FID), the noise added in the echo mode is only 0.2 ± 0.1 photons per shot, compared to 4 × 10⁴ photons in the FID modes. Using this echo pulse sequence in the "rephased amplified spontaneous emission" (RASE) scheme [Phys. Rev. A 81, 012301 (2010)] will allow for generation of entangled photon pairs that are in different frequency, temporal, and potentially spatial modes to any bright driving fields. The coherence and efficiency properties of this sequence were characterized in a Pr³⁺:Y₂SiO₅ crystal.

Original language	English
Pages (from-to)	1272-1274
Number of pages	3
Journal	Optics Letters
Volume	36
Issue number	7
DOIs	https://doi.org/10.1364/OL.36.001272
Publication status	Published - 1 Apr 2011

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abstract = "We have characterized a novel photon-echo pulse sequence for a double-Λ-type energy level system where the input and rephasing transitions are different from the applied π pulses. We show that, despite having imperfect π-pulses associated with large coherent emission due to free induction decay (FID), the noise added in the echo mode is only 0.2 ± 0.1 photons per shot, compared to 4 × 104 photons in the FID modes. Using this echo pulse sequence in the {"}rephased amplified spontaneous emission{"} (RASE) scheme [Phys. Rev. A 81, 012301 (2010)] will allow for generation of entangled photon pairs that are in different frequency, temporal, and potentially spatial modes to any bright driving fields. The coherence and efficiency properties of this sequence were characterized in a Pr3+:Y2SiO5 crystal.",

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AU - Beavan, Sarah E.

AU - Ledingham, Patrick M.

AU - Longdell, Jevon J.

AU - Sellars, Matthew J.

PY - 2011/4/1

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Photon echo without a free induction decay in a double-Λ system

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