Title :
Fiber-based frequency combs with millihertz-level relative linewidths for optical lattice clocks
Author :
Inaba, Hajime ; Nakajima, Yoshiaki ; Hosaka, Kazumoto ; Iwakuni, Kana ; Yasuda, Masami ; Kohno, Takuya ; Akamatsu, Daisuke ; Minoshima, Kaoru ; Onae, Atsushi ; Hong, Feng-Lei
Author_Institution :
Nat. Metrol. Inst. of Japan (NMIJ), AIST, Tsukuba, Japan
Abstract :
We have been developing a new clock laser system for Yb and Sr optical lattice clocks. The system is based on an infrared laser with a narrow linewidth, and a fiber-based frequency comb transferring the linewidth to required plural wavelengths. We demonstrate that fiber-based frequency combs with a multi-branch configuration can transfer laser linewidth to another wavelength at the millihertz level. An intra-cavity electro-optic modulator is employed to obtain a broad servo bandwidth for repetition rate control.
Keywords :
electro-optical modulation; optical lattices; strontium; ytterbium; Sr; Yb; clock laser system; fiber-based frequency combs; infrared laser; intra-cavity electro-optic modulator; millihertz-level relative linewidths; optical lattice clocks; Clocks; Erbium-doped fiber lasers; Fiber nonlinear optics; Frequency; High speed optical techniques; Lasers and electrooptics; Lattices; Optical fiber polarization; Optical mixing; Optical pumping;
Conference_Titel :
Precision Electromagnetic Measurements (CPEM), 2010 Conference on
Conference_Location :
Daejeon
Print_ISBN :
978-1-4244-6795-2
DOI :
10.1109/CPEM.2010.5544507