Ultra-narrow laser linewidth measurement based on distributed Rayleigh scattering speckle in optical fiber

Liang Zhang

doi:10.1117/12.2573922

10 October 2020 Ultra-narrow laser linewidth measurement based on distributed Rayleigh scattering speckle in optical fiber

Liang Zhang

Author Affiliations +

Proceedings Volume 11555, Real-time Photonic Measurements, Data Management, and Processing V; 115550Q (2020) https://doi.org/10.1117/12.2573922
Event: SPIE/COS Photonics Asia, 2020, Online Only

Abstract

Coherent lasers with ultra-narrow linewidth play a crucial role in high-precision metrology and coherent communication. Countless well-developed frequency stabilizations compensate mostly the low-frequency phase noise and facilitate an ultra-narrow linewidth down to quantum limit. Nevertheless, the precise characterization of its intrinsic linewidth of a coherent laser remains challenging. Here, a novel approach to characterize the linewidth of a coherent laser source relying on distributed Rayleigh scattering speckle in optical fiber was proposed and demonstrated. Phase noise statistics was revealed in a delay-time-resolved manner by correlation-based phase retrieval from Rayleigh scattering-induced heterodyne beating signals, facilitating precise measurement of a sub-kHz laser linewidth.

Conference Presentation

Citation Download Citation

Liang Zhang "Ultra-narrow laser linewidth measurement based on distributed Rayleigh scattering speckle in optical fiber", Proc. SPIE 11555, Real-time Photonic Measurements, Data Management, and Processing V, 115550Q (10 October 2020); https://doi.org/10.1117/12.2573922

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