Open AccessSpectroscopy of ^171Yb in an optical lattice based on laser linewidth transfer using a narrow linewidth frequency comb
Author(s) -
Hajime Inaba,
Kazumoto Hosaka,
Masami Yasuda,
Yoshiaki Nakajima,
Kana Iwakuni,
Daisuke Akamatsu,
Sho Okubo,
Takashi Kohno,
Atsushi Onae,
Feng−Lei Hong
Publication year - 2013
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.21.007891
Subject(s) - laser linewidth , laser , optics , frequency comb , materials science , distributed feedback laser , fiber laser , bandwidth (computing) , spectroscopy , optoelectronics , physics , telecommunications , computer science , quantum mechanics
We propose a novel, high-performance, and practical laser source system for optical clocks. The laser linewidth of a fiber-based frequency comb is reduced by phase locking a comb mode to an ultrastable master laser at 1064 nm with a broad servo bandwidth. A slave laser at 578 nm is successively phase locked to a comb mode at 578 nm with a broad servo bandwidth without any pre-stabilization. Laser frequency characteristics such as spectral linewidth and frequency stability are transferred to the 578-nm slave laser from the 1064-nm master laser. Using the slave laser, we have succeeded in observing the clock transition of (171)Yb atoms confined in an optical lattice with a 20-Hz spectral linewidth.