Affiliation:
1. The University of Tokyo
2. Korea University
Abstract
Here, ultra-low relative phase jitters over a wide optical spectrum were achieved for dual Ti:Sapphire optical frequency combs. The two optical frequency combs were independently phase-locked to a Sr optical lattice clock laser delivered through a commercial optical fiber network. We confirmed that the relative phase jitters between the two combs integrated from 8.3 mHz to 200 kHz were below 1 rad, corresponding to a relative linewidth of below 8.3 mHz, over the entire wavelength of the optical frequency combs ranging from 550 nm to 1020 nm. Our work paves the way for ultrahigh-precision dual-comb spectroscopy covering a wide optical spectral range with a simple setup, and provides an absolute optical frequency reference with great stability over a wide range of wavelengths.
Funder
Japan Society for the Promotion of Science
Ministry of Education, Culture, Sports, Science and Technology
Precursory Research for Embryonic Science and Technology
National Research Foundation of Korea
Korea University
Subject
Atomic and Molecular Physics, and Optics