We introduce a self-reference method of parabolic temporal lensing and aberration-free spectrotemporal imaging for the direct measurements of femtosecond waveforms, with the goal of designing an ultrafast optical oscilloscope. Our method is based on dispersive stretching of the signal pulse and afterwards cancellation of the dispersion-induced phase in a quadratic nonlinear process by adding a reference parabolic phase (instead of Kerr lensing of traditional spectral compression). We have implemented the method through sum-frequency generation using the self-shaped nonlinear-dispersive similariton as a reference pulse and have demonstrated it experimentally for the direct measurements of amplitude- and phase-modulated pulses on a femtosecond time scale.
© 2008 Optical Society of America
Measurement of Ultrashort Electromagnetic Pulses
Original Manuscript: November 2, 2007
Revised Manuscript: February 27, 2008
Manuscript Accepted: March 6, 2008
Published: May 13, 2008
Tigran Mansuryan, Aram Zeytunyan, Meri Kalashyan, Garegin Yesayan, Levon Mouradian, Frédéric Louradour, and Alain Barthélémy, "Parabolic temporal lensing and spectrotemporal imaging: a femtosecond optical oscilloscope," J. Opt. Soc. Am. B 25, A101-A110 (2008)