Near-Infrared and Telecommunication-Wavelength Photon-Pair Source in Optical Fiber

• URL: http://arxiv.org/abs/2602.15207v1
• Date: Mon, 16 Feb 2026 21:36:46 GMT
• Title: Near-Infrared and Telecommunication-Wavelength Photon-Pair Source in Optical Fiber
• Authors: Keshav Kapoor, Dong Beom Kim, Kriti Shetty, Virginia O. Lorenz,
• Abstract summary: We present a photon-pair source in commercially available optical fiber that produces paired photons at telecommunication and near-infrared (NIR) wavelengths.<n>The source's room-temperature operation, off-the-shelf materials, and multiplexing potential make it promising for deployment in quantum networks.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We present a photon-pair source in commercially available optical fiber that produces paired photons at telecommunication and near-infrared (NIR) wavelengths. The highly nondegenerate pairs are 700 nm apart: one in the 1500 nm E- and S-band telecommunication range and the other in the 830 nm NIR range. The high non-degeneracy means the photon pairs are far-detuned from Raman noise, resulting in a high coincidence-to-accidental ratio even while operating at room temperature. The source produces two spectrally and spatially distinct phase-matched processes with low spectral cross-talk, distinct transverse spatial modes in the NIR, and a single fundamental spatial mode in the telecommunication range. The source's room-temperature operation, off-the-shelf materials, and multiplexing potential make it promising for deployment in quantum networks.

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