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

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.

5 pages, 4 figures

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Cited by in corpus (1)

• From ultra-noisy to ultra-stable: optimization of the optoelectronic laser lock