Phase-Dependent Squeezing in Dual-Comb Interferometry

• URL: http://arxiv.org/abs/2506.18698v1
• Date: Mon, 23 Jun 2025 14:35:14 GMT
• Title: Phase-Dependent Squeezing in Dual-Comb Interferometry
• Authors: Daniel I. Herman, Molly Kate Kreider, Noah Lordi, Mathieu Walsh, Eugene J. Tsao, Alexander J. Lind, Matthew Heyrich, Joshua Combes, Scott A. Diddams, Jerome Genest,
• Abstract summary: We measure phase-dependent Kerr soliton squeezing and anti-squeezing in the time-domain dualcomb interferograms generated using two independent frequency comb lasers.<n>The signal appears as non-stationary quantum noise that varies with the fringe phase of the interferogram and dips below the shot-noise level by as much as 3.8 dB for alternating zero-crossings.
• Score: 32.73124984242397
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We measure phase-dependent Kerr soliton squeezing and anti-squeezing in the time-domain dualcomb interferograms generated using two independent frequency comb lasers. The signal appears as non-stationary quantum noise that varies with the fringe phase of the interferogram and dips below the shot-noise level by as much as 3.8 dB for alternating zero-crossings. The behavior arises from the periodic displacement of the Kerr squeezed comb by the coherent field of the second frequency comb, and is confirmed by a quantum noise model. These experiments support a route towards quantum-enhanced dual-comb timing applications and raise the prospect of high-speed quantum state tomography with dual-comb interferometry.

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