All-fiber-based ultrastable laser with long-term frequency stability of 1.1 × 10-14
Yafeng Huang, Di Hu, Meifeng Ye, Yating Wang, Yanli Li, Ming Li, Yinnan Chen, Qiuzhi Qu, Lingke Wang, L. Liu, Tang Li
Abstract
We demonstrate an ultrastable miniaturized transportable laser system at 1550 nm by locking it to an optical fiber delay line (FDL).To achieve optimized long-term frequency stability, the FDL was placed into a vacuum chamber with a five-layer thermal shield, and a delicate two-stage active temperature stabilization, an optical power stabilization, and an RF power stabilization were applied in the system.A fractional frequency stability of better than 3.2 10 -15 at 1 s averaging time and 1.1 10 -14 at 1000 s averaging time was achieved, which is the best long-term frequency stability of an all-fiber-based ultrastable laser observed to date.