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arXiv · 2502.20358

Creating multi-beam interference from two-beam interference with assistant of harmonics generation

Wuzhen Li·Zhiyuan Zhou·Li Chen·Yinhai Li·Guangcan Guo·Baosen Shi
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Abstract

Linear optics-based multi-beam interference (MBI), like the Fabry-Perot interferometer, plays an important role in precision optical metrology applications such as laser stabilization in optical clocks, precision spectroscopy, and gravitational wave detection. Here, we propose and experimentally verify a nonlinear optics-based MBI principle with the assistance of cascading and recycling harmonics generation of two-beam interference. By cascading and recycling the harmonics processes, in combining with optical power amplification (OPA) to compensate for power losses arising from limited nonlinear conversion efficiency, a total 16th harmonic is achieved, and the observed interference fringes gradually evolve from a sinusoidal curve to a Lorentz-like curve. In principle, there is no limitation on the number of cascading and recycling nonlinear processes with the assistance of OPAs and sharp interference fringes, analogous to those in a high-finesse cavity, can be obtained. The nonlinear optics-based MBI mechanism revealed here will find promising applications in precision optical metrology.

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Wuzhen Li, Zhiyuan Zhou, Li Chen, Yinhai Li, Guangcan Guo, Baosen Shi. 2025-02-27. Creating multi-beam interference from two-beam interference with assistant of harmonics generation. https://arxiv.org/abs/2502.20358

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