Attosecond active synchronization of passively mode-locked lasers by balanced cross correlation |
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| Authors: | 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 |
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| Institution: | Department of Electrical Engineering and Computer Science, Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA. schibli@mit.edu |
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| Abstract: | 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. |
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