Practical 1-um GHz fiber comb on silica-based platform
Abstract
We present a fully stabilized 1-GHz Yb-fiber laser frequency comb built on silica substrates, utilizing "optical cubes" to house all optical components, ensuring long-term stability and practical operation. Both the femtosecond laser and f-to-2f interferometer are constructed to silica bricks, with a compact footprint of 290 mm * 250 mm, and a total weight of 1.8 kg. This system provides a stable repetition rate, offset frequency, and a supercontinuum spanning 460-1560 nm without requiring amplification. The carrier-envelop offset frequency exhibits exceptional in-loop stability, with a fractional frequency instability of 3.07* 10^(-18) at a 1 second averaging time, improving to 2.12*10^(-20) at a 10,000 second, maintaining uninterrupted operation for over 60 hours. This work demonstrates a high-performance GHz fiber-based frequency comb, paving the way for applications beyond laboratory environments, including dual-comb spectroscopy, astronomical spectrograph calibration, and portable optical clocks.
Cite
@article{arxiv.2503.16249,
title = {Practical 1-um GHz fiber comb on silica-based platform},
author = {Ruoao Yang and Xingang Jin and Ya Wang and Minghe Zhao and Zhendong Chen and Xinpeng Lin and Fei Meng and Duo Pan and Qian Li and Jingbiao Chen and Aimin Wang and Zhigang Zhang},
journal= {arXiv preprint arXiv:2503.16249},
year = {2025}
}