We generated a coherently synthesized optical pulse from two independent mode-locked femtosecond lasers, providing a route to extend the coherent bandwidth available for ultrafast science. The two separate lasers (one centered at 760 nanometers wavelength, the other at 810 nanometers) are tightly synchronized and phase-locked. Coherence between the two lasers is demonstrated via spectral interferometry and second-order field cross-correlation. Measurements reveal a coherently synthesized pulse that has a temporally narrower second-order autocorrelation width and that exhibits a larger amplitude than the individual laser outputs. This work represents a new and flexible approach to the synthesis of coherent light.
CITATION STYLE
Shelton, R. K., Ma, L. S., Kapteyn, H. C., Murnane, M. M., Hall, J. L., & Ye, J. (2001). Phase-coherent optical pulse synthesis from separate femtosecond lasers. Science, 293(5533), 1286–1289. https://doi.org/10.1126/science.1061754
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