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Cavity-enhanced room-temperature broadband Raman memory

Cavity-enhanced room-temperature broadband Raman memory
Cavity-enhanced room-temperature broadband Raman memory
Broadband quantum memories hold great promise as multiplexing elements in future photonic quantum information protocols. Alkali-vapor Raman memories combine high-bandwidth storage, on-demand readout, and operation at room temperature without collisional fluorescence noise. However, previous implementations have required large control pulse energies and have suffered from four-wave-mixing noise. Here, we present a Raman memory where the storage interaction is enhanced by a low-finesse birefringent cavity tuned into simultaneous resonance with the signal and control fields, dramatically reducing the energy required to drive the memory. By engineering antiresonance for the anti-Stokes field, we also suppress the four-wave-mixing noise and report the lowest unconditional noise floor yet achieved in a Raman-type warm vapor memory, (15±2)×10−3 photons per pulse, with a total efficiency of (9.5±0.5)%.
0031-9007
1-5
Saunders, D. J.
10810e82-8bc1-4e2d-b44b-960e7bc7623b
Munns, J. H. D.
a377f213-2da3-463c-924b-32122eb68c4c
Champion, T. F. M.
42a175cf-70ac-40fd-9a84-f544296f15df
Qiu, C.
28e635c9-2ac2-450f-96eb-66cc2ca8038f
Kaczmarek, K. T.
1658d0d5-06c7-4282-aea9-b2dbab601a12
Poem, E.
b7e555a1-2a22-4618-a0b7-8b13368d79b5
Ledingham, P. M.
8db45fde-00d8-421a-93d6-7f18ac835c28
Walmsley, I. A.
a9b02ef9-f5d9-473f-ac01-bbbe06d28170
Nunn, J.
9703e4ad-7931-4c95-8c3d-65d76365f88a
Saunders, D. J.
10810e82-8bc1-4e2d-b44b-960e7bc7623b
Munns, J. H. D.
a377f213-2da3-463c-924b-32122eb68c4c
Champion, T. F. M.
42a175cf-70ac-40fd-9a84-f544296f15df
Qiu, C.
28e635c9-2ac2-450f-96eb-66cc2ca8038f
Kaczmarek, K. T.
1658d0d5-06c7-4282-aea9-b2dbab601a12
Poem, E.
b7e555a1-2a22-4618-a0b7-8b13368d79b5
Ledingham, P. M.
8db45fde-00d8-421a-93d6-7f18ac835c28
Walmsley, I. A.
a9b02ef9-f5d9-473f-ac01-bbbe06d28170
Nunn, J.
9703e4ad-7931-4c95-8c3d-65d76365f88a

Saunders, D. J., Munns, J. H. D., Champion, T. F. M., Qiu, C., Kaczmarek, K. T., Poem, E., Ledingham, P. M., Walmsley, I. A. and Nunn, J. (2016) Cavity-enhanced room-temperature broadband Raman memory. Physical Review Letters, 116 (9), 1-5, [090501]. (doi:10.1103/PhysRevLett.116.090501).

Record type: Article

Abstract

Broadband quantum memories hold great promise as multiplexing elements in future photonic quantum information protocols. Alkali-vapor Raman memories combine high-bandwidth storage, on-demand readout, and operation at room temperature without collisional fluorescence noise. However, previous implementations have required large control pulse energies and have suffered from four-wave-mixing noise. Here, we present a Raman memory where the storage interaction is enhanced by a low-finesse birefringent cavity tuned into simultaneous resonance with the signal and control fields, dramatically reducing the energy required to drive the memory. By engineering antiresonance for the anti-Stokes field, we also suppress the four-wave-mixing noise and report the lowest unconditional noise floor yet achieved in a Raman-type warm vapor memory, (15±2)×10−3 photons per pulse, with a total efficiency of (9.5±0.5)%.

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PhysRevLett.116.090501 - Version of Record
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Accepted/In Press date: 15 October 2015
Published date: 3 March 2016

Identifiers

Local EPrints ID: 443893
URI: http://eprints.soton.ac.uk/id/eprint/443893
ISSN: 0031-9007
PURE UUID: ba125e94-8d7a-4460-9b9c-15156f18d828

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Date deposited: 16 Sep 2020 16:34
Last modified: 16 Sep 2020 16:34

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