Discrete Diffraction for Spectral Purification in Spontaneous Four Wave Mixing: a Recipe

2019/12/09 by Philip B. Main, Main, Philip B., Peter J. Mosley +3
Engineering · Physics and Astronomy · #Advanced Fiber Laser Technologies #FOS: Physical sciences #Optics (physics.optics) #Photonic and Optical Devices #Photorefractive and Nonlinear Optics #Quantum Physics (quant-ph)

paper · pdf · doi:10.48550/arxiv.1912.03950

openalex publication_date 2019/12/09 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

Linear discrete diffraction of light within a waveguide array allows control over the longitudinal spatial profile of light. We propose a method of using this control to effectively modulate the nonlinearity in a spontaneous four wave mixing system. This allows the removal spurious frequency correlations between the generated signal and idler photon pairs. Weaving our method into a recipe for waveguide design, we demonstrate a spectral purity improvement from P = 0.78 to near saturation at P = 0.97, for a simple silicon-on-insulator geometry.

Citations

• Eliminating frequency and space-time correlations in multiphoton states
• Hong-Ou-Mandel Interference

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