A compact green Ti:Sapphire astro-comb with 43-GHz repetition frequency
Abstract
A compact green astro-comb with 43-GHz repetition rate is developed based on a Ti:Sapphire optical frequency comb (OFC) and a mode-selecting cavity. The OFC's large repetition rate of 1.6 GHz eases the requirements for the mode-selecting cavity. Unnecessary frequency-modes of the OFC are suppressed down to at 535 nm - 550 nm using a single mode-selecting cavity with 70-MHz linewidth. The radial velocity precision m/s is achieved at the High Dispersion Echelle Spectrosraph for the Okayama 188-cm telescope of the National Astronomical Observatory of Japan using our astro-comb. With further improvements of the mode-selecting cavity and removal of fiber modal noises, our system will provide a simple, compact, and precise astro-comb setup in visible wavelength region.
Keywords
Cite
@article{arxiv.2101.05926,
title = {A compact green Ti:Sapphire astro-comb with 43-GHz repetition frequency},
author = {Eunmi Chae and Eiji Kambe and Kentaro Motohara and Hideyuki Izumiura and Mamoru Doi and Kosuke Yoshioka},
journal= {arXiv preprint arXiv:2101.05926},
year = {2021}
}
Comments
10 pages, 7 figures