title: Demonstration of an optical frequency synthesizer with zero carrier-envelope-offset frequency stabilized by the direct locking method.
abstract: We developed an optical frequency synthesizer (OFS) with the carrier-envelope-offset frequency locked to 0 Hz achieved using the "direct locking method." This method differs from a conventional phaselock method in that the interference signal from a self-referencing f-2f interferometer is directly fed back to the carrier-envelope-phase control of a femtosecond laser in the time domain. A comparison of the optical frequency of the new OFS to that of a conventional OFS stabilized by a phase-lock method showed that the frequency comb of the new OFS was not different to that of the conventional OFS within an uncertainty of 5.68x10(-16). As a practical application of this OFS, we measured the absolute frequency of an acetylene-stabilized diode laser serving as an optical frequency standard in optical communications.
authors.affiliation: Korea Research Institute of Standards and Science, 209 Gajeong-Ro, Yuseong-Gu, Daejeon 305-340, Korea.
authors.forename: Eok Bong
authors.initials: EB
authors.lastname: Kim
authors.forename: Jae-hwan
authors.initials: JH
authors.lastname: Lee
authors.forename: Luu Tran
authors.initials: LT
authors.lastname: Trung
authors.forename: Wong-Kyu
authors.initials: WK
authors.lastname: Lee
authors.forename: Dai-Hyuk
authors.initials: DH
authors.lastname: Yu
authors.forename: Han Young
authors.initials: HY
authors.lastname: Ryu
authors.forename: Chang Hee
authors.initials: CH
authors.lastname: Nam
authors.forename: Chang Yong
authors.initials: CY
authors.lastname: Park
mesh_terms: D003198:Computer Simulation; D004867:Equipment Design / Q000295:instrumentation; D007368:Interferometry / Q000379:methods; D007834:Lasers; D055096:Optical Devices; D055095:Optics and Photonics; D010825:Physics / Q000379:methods