On-line diagnostic tool for measurement of the time delay between two ultrashort light pulses

Summary, in English

Ultrafast accelerator-based sources combined with synchronized femtosecond lasers are currently being developed. The method described here is intended as a jitter monitor at such facilities. We report on the possibility of extracting a time-offset signal between two different synchronized ultrashort light pulses. The method is based on sum-frequency generation in a nonlinear crystal. Aiming at extracting the time-difference from visible pulsed radiation from an x-ray undulator and femtosecond laser pulses we are investigating the possibility of obtaining timing information when one of the two pulses is very weak (10(6) photons/pulse). This will enable on-line monitoring of the relative timing of an accelerator-based free-electron laser and a synchronized visible laser. The spatial position of the sum-frequency mixed region is registered using a position sensitive detector (PSD). We show that for an 80 fs light source the described electronic equipment is capable of delivering a signal proportional to the temporal shift of different ultrashort light pulses with an accuracy of approximately 30 fs in a time interval of several ps.

• Författare: Vladimir Tenishev; Vladimir Avdeichikov; A Persson; Jörgen Larsson
• Avdelning/ar: Atomfysik; Kärnfysik
• Publiceringsår: 2004
• Språk: Engelska
• Sidor: 1762-1767
• Publikation/Tidskrift/Serie: Measurement Science & Technology
• Volym: 15
• Issue: 9
• Fulltext: - 165 kB; Download statistics
• Länkar: http://dx.doi.org/10.1088/0957-0233/15/9/012
• Dokumenttyp: Artikel i tidskrift
• Förlag: IOP Publishing
• Ämne: Atom and Molecular Physics and Optics; Subatomic Physics
• Nyckelord: position sensitive detector; femtosecond laser; detector calibration; auto/cross correlator; synchronization; time-resolved pump-probe; experiments
• Status: Published
• ISBN/ISSN/Övrigt: ISSN: 0957-0233