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Opt Lett. 2004 Apr 15;29(8):890-2.

Femtosecond pulse-shape modulation at kilohertz rates.

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  • 1Department of Physics of Complex Systems, Weizmann Institute of Science, Rehovot 76100, Israel.


We demonstrate a new scanning femtosecond pulse-shaping technique that allows pulse shapes to be modulated at kilohertz rates. This technique is particularly useful for lock-in measurements in which the signal is synchronized with the alternating pulse shapes. The pulse-shape lock-in technique is demonstrated in resonant coherent anti-Stokes Raman scattering, where it is shown to significantly improve the ratio of the resonant signal to both the nonresonant background and to noise.

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