Demonstration of an optical frequency synthesizer with zero carrier-envelope-offset frequency stabilized by the direct locking method.
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.
Kim
Eok Bong
EB
Korea Research Institute of Standards and Science, 209 Gajeong-Ro, Yuseong-Gu, Daejeon 305-340, Korea.
Lee
Jae-hwan
JH
Trung
Luu Tran
LT
Lee
Wong-Kyu
WK
Yu
Dai-Hyuk
DH
Ryu
Han Young
HY
Nam
Chang Hee
CH
Park
Chang Yong
CY
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