Demonstration of a HeNe/CH4-based optical molecular clock.
Demonstration of a HeNe/CH4-based optical molecular clock.
复制标题
DOI：
10.1364/ol.30.000570
复制
发表时间：
2005-03
期刊：
影响因子：
3.6
通讯作者：
S. Foreman;A. Marian;Jun Ye;E. Petrukhin;M. Gubin;O. Mücke;F. Wong;E. Ippen;F. Kärtner
中科院分区：
文献类型：
--
作者：
S. Foreman;A. Marian;Jun Ye;E. Petrukhin;M. Gubin;O. Mücke;F. Wong;E. Ippen;F. Kärtner
我们基于甲烷中的 F2(2) [P(7), v3] 光学跃迁实现了一个简单的光学时钟。单个飞秒激光器的频率梳经过差频生成，以提供具有零载波包络偏移的 3.39 微米红外梳。该红外梳在 88-THz 光学参考和射频重复率之间提供相位相干链接。重复率信号与稳定于分子碘的第二个飞秒梳的比较显示，1 秒时的不稳定性为 1.2 x 10(-13)，受到重复率微波检测的限制。微波信号的单边带相位噪声（归一化为 1 GHz 载波频率）在 1 Hz 偏移时低于 -93 dBc/Hz。
We implement a simple optical clock based on the F2(2) [P(7), v3] optical transition in methane. A single femtosecond laser's frequency comb undergoes difference frequency generation to provide an IR comb at 3.39 microm with a null carrier-envelope offset. This IR comb provides a phase-coherent link between the 88-THz optical reference and the rf repetition rate. Comparison of the repetition rate signal with a second femtosecond comb stabilized to molecular iodine shows an instability of 1.2 x 10(-13) at 1 s, limited by microwave detection of the repetition rates. The single-sideband phase noise of the microwave signal, normalized to a carrier frequency of 1 GHz, is below -93 dBc/Hz at 1-Hz offset.