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Quantum Gate Fidelity Benchmarking

Spontaneous Brillouin Scattering in a Few-Mode Optical Fiber

arXiv
Authors: Hikari Kikuchi, Rekishu Yamazaki

Year

2026

Paper ID

4000

Status

Preprint

Abstract Read

~2 min

Abstract Words

99

Citations

N/A

Abstract

We report a comprehensive experimental study of spontaneous Brillouin scattering in a few-mode optical fiber, resolving both forward and backward scattering processes for intra- and inter-modal interactions. Using heterodyne detection, Stokes and anti-Stokes components without external acoustic excitation are observed and quantitatively extracted Brillouin shifts, linewidths, and gain coefficients. Forward scattering is mediated by guided torsional-radial acoustic modes with frequencies ranging from MHz to GHz, while backward scattering involves longitudinal core-guided modes at frequencies of tens of GHz. These results provide calibrated benchmarks for Brillouin interactions in few-mode fibers, offering insights relevant to phonon-based quantum applications and mode-selective optomechanics.

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  • We report a comprehensive experimental study of spontaneous Brillouin scattering in a few-mode optical fiber, resolving both forward and backward scattering processes for...

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References & Citation Signals

[1] DOI https://doi.org/arXiv:2601.06569 [2] arXiv https://arxiv.org/abs/2601.06569 [3] Publisher https://arxiv.org/abs/2601.06569

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