We propose a sampling technique for measuring the shape of ultrashort soft-x-ray pulses. The technique uses the transient state of Kr⁺ ions that is produced by the femtosecond sequential evolution of Kr ions during optical-field-induced ionization as an ultrafast x-ray-absorption sampling gate. We demonstrate the technique by measuring the pulse shape of the 51st harmonic (15.6 nm) generated by a 100-fs titanium:sapphire laser pulse. The measured pulse duration is 220 fs. Our experimental result confirms that the sequential evolution of Kr⁺ ions from neutral Kr to Kr²⁺ is the dominant contribution to the ionization process from the aspect of time-domain measurement.

© 2004 Optical Society of America

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

Related Journal Articles

• Amplitude and phase characterization of 4.5-fs pulses by frequency-resolved optical gating (OL)
• Measurement of pulse asymmetry by three-photon-absorption autocorrelation in a GaAsP photodiode (OL)
• Measurement of transient nonlinear refractive index in gases using xenon supercontinuum single-shot spectral interferometry (OE)
• Contrast degradation in a chirped-pulse amplifier due to generation of prepulses by postpulses (OE)
• Pump power dependence of femtosecond two-color optical Kerr shutter measurements (OE)

Related Conference Papers

• Ultrasimple Extremely Broadband Transient-Grating Frequency-Resolved-Optical-Gating Device
• Sub-femtosecond EUV Pulses via Energy Selective Non-linear Stabilization in a Waveguide
• Sub-femtosecond EUV Pulses via Energy Selective Non-linear Stabilization in a Waveguide
• Femtosecond Pump-Probe Diagnostics of Preformed Plasma Channels
• Characterization of Ultrashort Pulses with Spatio-Temporal and Angular Resolution