We present direct measurements of the spatiotemporal electric field of an ultrashort Bessel-X pulse generated using a conical lens (axicon). These measurements were made using the linear-optical interferometric technique SEA TADPOLE, which has micrometer spatial resolution and femtosecond temporal resolution. From our measurements, both the superluminal velocity of the Bessel pulse and the propagation invariance of the central spot are apparent. We verified our measurements with simulations.
© 2009 Optical Society of America
Original Manuscript: May 13, 2009
Revised Manuscript: June 22, 2009
Manuscript Accepted: June 23, 2009
Published: July 21, 2009
Pamela Bowlan, Heli Valtna-Lukner, Madis Lõhmus, Peeter Piksarv, Peeter Saari, and Rick Trebino, "Measuring the spatiotemporal field of ultrashort Bessel-X pulses," Opt. Lett. 34, 2276-2278 (2009)