title: Spectroscopy of 171Yb in an optical lattice based on laser linewidth transfer using a narrow linewidth frequency comb.
abstract: 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.
authors.affiliation: National Metrology Institute of Japan, 1-1-1 Umezono, Tsukuba, Ibaraki 305-8563, Japan. h.inaba@aist.go.jp
authors.forename: Hajime
authors.initials: H
authors.lastname: Inaba
authors.forename: Kazumoto
authors.initials: K
authors.lastname: Hosaka
authors.forename: Masami
authors.initials: M
authors.lastname: Yasuda
authors.forename: Yoshiaki
authors.initials: Y
authors.lastname: Nakajima
authors.forename: Kana
authors.initials: K
authors.lastname: Iwakuni
authors.forename: Daisuke
authors.initials: D
authors.lastname: Akamatsu
authors.forename: Sho
authors.initials: S
authors.lastname: Okubo
authors.forename: Takuya
authors.initials: T
authors.lastname: Kohno
authors.forename: Atsushi
authors.initials: A
authors.lastname: Onae
authors.forename: Feng-Lei
authors.initials: FL
authors.lastname: Hong
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D005374:Filtration / Q000295:instrumentation*; D007834:Lasers; D009991:Oscillometry / Q000295:instrumentation*; D012031:Refractometry / Q000295:instrumentation*; D020349:Surface Plasmon Resonance / Q000295:instrumentation*; D013997:Time Factors