We measure the spatial evolution of a laser pulse used to generate high harmonics in a He-filled cell. Best phase matching occurs in the region between double foci, associated with laser filamentation.

Get PDF Email Share Share with Facebook Tweet This Post on reddit Share with LinkedIn Add to CiteULike Add to Mendeley Add to BibSonomy Get Citation Copy Citation Text M. Turner, J. J. Campbell, K. Farnsworth, M. Martin, R. Petersen, N. Powers, and J. Peatross, "Characterization of Radiometric Particle Levitation in a Laser Beam," in Frontiers in Optics, OSA Technical Digest (CD) (Optica Publishing Group, 2006), paper FThG3. Export Citation BibTex Endnote (RIS) HTML Plain Text Citation alert Save article

Get PDF Email Share Share with Facebook Tweet This Post on reddit Share with LinkedIn Add to CiteULike Add to Mendeley Add to BibSonomy Get Citation Copy Citation Text J. C. Painter, G. Giraud, N. Powers, J. R. Sutherland, M. Turner, M. Ware, and J. Peatross, "Role of Laser Self-Focusing for High-Order Harmonic Generation in Extended Gas Cells," in Frontiers in Optics, OSA Technical Digest Series (Optica Publishing Group, 2005), paper JTuC12. Export Citation BibTex Endnote (RIS) HTML Plain Text Citation alert Save article

Get PDF Email Share Share with Facebook Tweet This Post on reddit Share with LinkedIn Add to CiteULike Add to Mendeley Add to BibSonomy Get Citation Copy Citation Text N. Farnsworth, N. Powers, S. L. Voronov, R. S. Turley, M. Ware, and J. Peatross, "Construction of an Extreme Ultravioltet Polarimeter Based on High-Order Harmonic Generation," in Frontiers in Optics, OSA Technical Digest Series (Optica Publishing Group, 2005), paper JWA8. Export Citation BibTex Endnote (RIS) HTML Plain Text Citation alert Save article

Get PDF Email Share Share with Facebook Tweet This Post on reddit Share with LinkedIn Add to CiteULike Add to Mendeley Add to BibSonomy Get Citation Copy Citation Text M. Adams, N. Powers, G. Giraud, M. Ware, and J. Peatross, "Conversion Efficiency of Laser-Generated High-Order Harmonics in Extended Gas Cells," in Frontiers in Optics, OSA Technical Digest Series (Optica Publishing Group, 2005), paper JTuC10. Export Citation BibTex Endnote (RIS) HTML Plain Text Citation alert Save article

Ten-millijoule 35-femtosecond laser pulses interact with a cell of helium or neon that extends from a focusing lens to an exit foil near the laser focus. High harmonic orders in the range of 50 to 100 are investigated as a function of focal position relative to the exit foil. An aperture placed in front of the focusing lens increases the brightness of observed harmonics by more than an order of magnitude. Counter-propagating light is used to directly probe where the high harmonics are generated within the laser focus. In neon, the harmonics are generated in the last few millimeters before the exit foil, limited by absorption. In helium, the harmonics are produced over a much longer distance.