Kim K, Washburn B R, Wilpers G, Oates C W, Hollberg L, Newbury N R, Diddams S A, Nicholson J W, Yan M F
National Institute of Standards and Technology, Boulder, Colorado 80305, USA.
Opt Lett. 2005 Apr 15;30(8):932-4. doi: 10.1364/ol.30.000932.
A frequency comb is generated with a Cr:forsterite femtosecond laser, spectrally broadened through a highly nonlinear optical fiber to span from 1.0 to 2.2 ,m, and stabilized using the f-to-2f self-referencing technique. The repetition rate and the carrier-envelope offset frequency are stabilized to a hydrogen maser, calibrated by a cesium atomic fountain clock. Simultaneous frequency measurement of a 657-nm cw laser by use of the stabilized frequency combs from this Cr:forsterite system and a Ti:sapphire laser agree at the 10(-13) level. The frequency noise of the comb components is observed at 1064, 1314, and 1550 nm by comparing the measured beat frequencies between cw lasers and the supercontinuum frequency combs.
利用铬掺杂镁橄榄石飞秒激光器产生频率梳，通过高非线性光纤进行光谱展宽，使其覆盖范围从1.0微米至2.2微米，并采用f - 2f自参考技术实现稳定。重复频率和载波包络偏移频率被锁定到氢脉泽，并由铯原子喷泉钟进行校准。利用该铬掺杂镁橄榄石系统产生的稳定频率梳以及钛宝石激光器对657纳米连续波激光器进行的同时频率测量，在10^(-13)量级上达成一致。通过比较连续波激光器与超连续谱频率梳之间测量的拍频，观测到了频率梳分量在1064纳米、1314纳米和1550纳米处的频率噪声。
