Cavity-based optical switching via phase modulation in warm rubidium vapor

G. Booton; T. Wasawo; W. O. C. Davis; C. McGarry; K. R. Rusimova; A. O. C. Davis; J. Nunn; P. J. Mosley

doi:10.1103/r7xf-lptn

Cavity-based optical switching via phase modulation in warm rubidium vapor

G. Booton, T. Wasawo, W. O. C. Davis, C. McGarry, K. R. Rusimova, A. O. C. Davis, J. Nunn, P. J. Mosley

School of Mathematical and Physical Sciences

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Abstract

Optical switching remains a key outstanding challenge for scalable photonic quantum computing due to the trade-off between speed, bandwidth, and loss. Quantum photonics demands all three to enable high computational clock rates and resource-efficient scaling to large systems. We present a cavity-based optical switch that overcomes this limitation, demonstrating a rise time of 22 ns, an insertion loss of 2.4 dB, and an extinction ratio of 17.5, which bridges the gap between speed and efficiency in photonic switching. All-optical control is achieved via phase modulation of a signal field detuned from the near-degenerate two-photon absorption ladder in warm rubidium vapor. The ultimate performance of our switch will find applications in active multiplexing, loop-based quantum memory, and feed-forward for quantum error-correction protocols.

Original language	English
Article number	L051701
Pages (from-to)	L051701-1-L051701-6
Number of pages	6
Journal	Physical Review A
Volume	113
Issue number	5
DOIs	https://doi.org/10.1103/r7xf-lptn
Publication status	Published - May 2026

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title = "Cavity-based optical switching via phase modulation in warm rubidium vapor",

abstract = "Optical switching remains a key outstanding challenge for scalable photonic quantum computing due to the trade-off between speed, bandwidth, and loss. Quantum photonics demands all three to enable high computational clock rates and resource-efficient scaling to large systems. We present a cavity-based optical switch that overcomes this limitation, demonstrating a rise time of 22 ns, an insertion loss of 2.4 dB, and an extinction ratio of 17.5, which bridges the gap between speed and efficiency in photonic switching. All-optical control is achieved via phase modulation of a signal field detuned from the near-degenerate two-photon absorption ladder in warm rubidium vapor. The ultimate performance of our switch will find applications in active multiplexing, loop-based quantum memory, and feed-forward for quantum error-correction protocols.",

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doi = "10.1103/r7xf-lptn",

language = "English",

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T1 - Cavity-based optical switching via phase modulation in warm rubidium vapor

AU - Booton, G.

AU - Wasawo, T.

AU - Davis, W. O. C.

AU - McGarry, C.

AU - Rusimova, K. R.

AU - Davis, A. O. C.

AU - Nunn, J.

AU - Mosley, P. J.

N1 - Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

PY - 2026/5

Y1 - 2026/5

N2 - Optical switching remains a key outstanding challenge for scalable photonic quantum computing due to the trade-off between speed, bandwidth, and loss. Quantum photonics demands all three to enable high computational clock rates and resource-efficient scaling to large systems. We present a cavity-based optical switch that overcomes this limitation, demonstrating a rise time of 22 ns, an insertion loss of 2.4 dB, and an extinction ratio of 17.5, which bridges the gap between speed and efficiency in photonic switching. All-optical control is achieved via phase modulation of a signal field detuned from the near-degenerate two-photon absorption ladder in warm rubidium vapor. The ultimate performance of our switch will find applications in active multiplexing, loop-based quantum memory, and feed-forward for quantum error-correction protocols.

AB - Optical switching remains a key outstanding challenge for scalable photonic quantum computing due to the trade-off between speed, bandwidth, and loss. Quantum photonics demands all three to enable high computational clock rates and resource-efficient scaling to large systems. We present a cavity-based optical switch that overcomes this limitation, demonstrating a rise time of 22 ns, an insertion loss of 2.4 dB, and an extinction ratio of 17.5, which bridges the gap between speed and efficiency in photonic switching. All-optical control is achieved via phase modulation of a signal field detuned from the near-degenerate two-photon absorption ladder in warm rubidium vapor. The ultimate performance of our switch will find applications in active multiplexing, loop-based quantum memory, and feed-forward for quantum error-correction protocols.

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JO - Physical Review A

JF - Physical Review A

IS - 5

M1 - L051701

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Cavity-based optical switching via phase modulation in warm rubidium vapor

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