Ultrafast switching of telecom photon-number states
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arXiv
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| Main Authors: | , , , , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866908590386708480 |
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| author | Fenwick, Kate L. Bouchard, Frédéric Sit, Alicia Lee, Timothy Proppe, Andrew H. Thekkadath, Guillaume England, Duncan Bustard, Philip J. Lundeen, Jeff S. Sussman, Benjamin J. |
| author_facet | Fenwick, Kate L. Bouchard, Frédéric Sit, Alicia Lee, Timothy Proppe, Andrew H. Thekkadath, Guillaume England, Duncan Bustard, Philip J. Lundeen, Jeff S. Sussman, Benjamin J. |
| contents | A crucial component of photonic quantum information processing platforms is the ability to modulate, route, convert, and switch quantum states of light noiselessly with low insertion loss. For instance, a high-speed, low-loss optical switch is crucial for scaling quantum photonic systems that rely on measurement-based feed-forward approaches. Such a device will also ideally be capable of operating on photon-number states, which can act as non-Gaussian resources. Here, we demonstrate ultrafast all-optical switching of heralded photon-number states, of up to 6 photons, using the optical Kerr effect in a single-mode fiber. A local birefringence is created by a high-intensity pump pulse at a center wavelength of 1030 nm which overlaps temporally with the 1550 nm photons in the fiber. A switching efficiency of $>$99 % is reached with a resolution of 2.3 ps, an insertion loss of $2.27\pm0.08$ dB, and a signal-to-noise ratio of 32,000. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_12376 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Ultrafast switching of telecom photon-number states Fenwick, Kate L. Bouchard, Frédéric Sit, Alicia Lee, Timothy Proppe, Andrew H. Thekkadath, Guillaume England, Duncan Bustard, Philip J. Lundeen, Jeff S. Sussman, Benjamin J. Quantum Physics Optics A crucial component of photonic quantum information processing platforms is the ability to modulate, route, convert, and switch quantum states of light noiselessly with low insertion loss. For instance, a high-speed, low-loss optical switch is crucial for scaling quantum photonic systems that rely on measurement-based feed-forward approaches. Such a device will also ideally be capable of operating on photon-number states, which can act as non-Gaussian resources. Here, we demonstrate ultrafast all-optical switching of heralded photon-number states, of up to 6 photons, using the optical Kerr effect in a single-mode fiber. A local birefringence is created by a high-intensity pump pulse at a center wavelength of 1030 nm which overlaps temporally with the 1550 nm photons in the fiber. A switching efficiency of $>$99 % is reached with a resolution of 2.3 ps, an insertion loss of $2.27\pm0.08$ dB, and a signal-to-noise ratio of 32,000. |
| title | Ultrafast switching of telecom photon-number states |
| topic | Quantum Physics Optics |
| url | https://arxiv.org/abs/2504.12376 |