uu.seUppsala University Publications
Change search
ReferencesLink to record
Permanent link

Direct link
Convenient pulse length measurement of sub-20-fs pulses down to the deep UV via two-photon absorption in bulk material
2011 (English)In: Applied physics. B, Lasers and optics (Print), ISSN 0946-2171, E-ISSN 1432-0649, Vol. 104, no 4, 783-791 p.Article in journal (Refereed) Published
Abstract [en]

The beam attenuation by two-photon absorption in thin crystals and glass plates is utilized for directly measuring the intensity autocorrelation of UV femtosecond pulses without the need for an auxiliary pulse. We give a full description of the newly developed setup for operation from the blue down to the deep UV. The conditions that must be met to achieve reliable measurements are investigated. The choice of the two-photon-absorbing material governs the attainable wavelength range, the material thickness determines the shortest pulse that can be reliably characterized and high intensities influence the derived pulse duration due to saturation effects. The performance of the UV autocorrelator is demonstrated for pulses with durations below 20 fs, with energies of 3 nJ and with central wavelengths from the visible down to 195 nm. 2-Hz update rates are achieved at the 1-kHz repetition rate of the laser. The wavelength dependence of the two-photon-absorption coefficient of BBO is determined by z-scan measurements and we find that it decreases much faster at longer wavelengths than is expected from the linear absorption spectrum.

Place, publisher, year, edition, pages
2011. Vol. 104, no 4, 783-791 p.
National Category
Atom and Molecular Physics and Optics
URN: urn:nbn:se:uu:diva-215425DOI: 10.1007/s00340-011-4683-0ISI: 000295611800007OAI: oai:DiVA.org:uu-215425DiVA: diva2:687158
Available from: 2014-01-13 Created: 2014-01-13 Last updated: 2014-01-13

Open Access in DiVA

No full text

Other links

Publisher's full text
In the same journal
Applied physics. B, Lasers and optics (Print)
Atom and Molecular Physics and Optics

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 128 hits
ReferencesLink to record
Permanent link

Direct link