Schibli T R, Kim J, Kuzucu O, Gopinath J T, Tandon S N, Petrich G S, Kolodziejski L A, Fujimoto J G, Ippen E P, Kaertner F X
Department of Electrical Engineering and Computer Science, Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
Opt Lett. 2003 Jun 1;28(11):947-9. doi: 10.1364/ol.28.000947.
A balanced cross correlator, the optical equivalent of a balanced microwave phase detector, is demonstrated. Its use in synchronizing an octave-spanning Ti:sapphire laser and a 30-fs Cr:forsterite laser yields 300-attosecond timing jitter measured from 10 mHz to 2.3 MHz. The spectral overlap between the two lasers is strong enough to permit direct detection of the difference in carrier-envelope offset frequency between the two lasers.
展示了一种平衡交叉相关器，它相当于平衡微波相位探测器的光学等效物。将其用于同步倍频程钛宝石激光器和30飞秒的铬：镁橄榄石激光器，可产生从10毫赫兹到2.3兆赫兹测量的300阿秒定时抖动。两台激光器之间的光谱重叠足够强，能够直接检测两台激光器之间载波包络偏移频率的差异。
