We demonstrate that two harmonic sources generated independently in a xenon gas jet using the same picosecond Nd:YAG laser are locked in phase. The experiment is performed by separating a laser beam into two parallel beams focused at different locations under the nozzle of a gas jet, and therefore producing two independent sources of harmonic radiation, and studying the pattern obtained in the far field when the radiations from these sources interfere. A high and robust fringe visibility is obtained. © 1997 The American Physical Society.
Publication Source (Journal or Book title)
Physical Review Letters
Zerne, R., Altucci, C., Bellini, M., Gaarde, M., Hänsch, T., L’huillier, A., Lyngå, C., & Wahlström, C. (1997). Phase-locked high-order harmonic sources. Physical Review Letters, 79 (6), 1006-1009. https://doi.org/10.1103/PhysRevLett.79.1006