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arXiv · 2409.04681

10$^{-15}$-level laser stabilization down to fiber thermal noise limit using self-homodyne detection

Igju Jeon·Woosong Jeong·Changmin Ahn·Jungwon Kim
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Abstract

We demonstrate a self-homodyne detection method to stabilize a continuous-wave 1550-nm laser to a 1-km optical fiber delay line, achieving a frequency instability of 6.3x10 -15 at a 16-ms averaging time. This result, limited by fiber thermal noise, is achieved without the need for a vacuum system, highlighting the potential of our approach for ultra-stable laser systems in non-laboratory environments. The system utilizes only a few passive fiber optic components and a single balanced photodetector, significantly simplifying the laser stabilization process while maintaining high performance. The entire optical setup is compactly packaged in a portable metal air-tight case.

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Igju Jeon, Woosong Jeong, Changmin Ahn, Jungwon Kim. 2024-09-07. 10$^{-15}$-level laser stabilization down to fiber thermal noise limit using self-homodyne detection. https://doi.org/10.1364/ol.541281

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