Infrared Two-Color Multicycle Laser Field Synthesis for Generating an Intense Attosecond Pulse
- Extreme Photonics Research Group, RIKEN Advanced Science Institute, 2-1 Hirosawa, Wako, Saitama 351-0198 (Japan)
- Photonics Institute, Vienna University of Technology, Gusshausstrasse 27-387, A-1040 Vienna (Austria)
We propose and demonstrate the generation of a continuum high-order harmonic spectrum by mixing multicycle two-color (TC) laser fields with the aim of obtaining an intense isolated attosecond pulse. By optimizing the wavelength of a supplementary infrared pulse in a TC field, a continuum harmonic spectrum was created around the cutoff region without carrier-envelope phase stabilization. The obtained harmonic spectra clearly show the possibility of generating isolated attosecond pulses from a multicycle TC laser field, which is generated by an 800 nm, 30 fs pulse mixed with a 1300 nm, 40 fs pulse. Our proposed method enables us not only to relax the requirements for the pump pulse duration but also to reduce ionization of the harmonic medium. This concept opens the door to create an intense isolated attosecond pulse using a conventional femtosecond laser system.
- OSTI ID:
- 21410400
- Journal Information:
- Physical Review Letters, Vol. 104, Issue 23; Other Information: DOI: 10.1103/PhysRevLett.104.233901; (c) 2010 The American Physical Society; ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CARRIERS
COLOR MODEL
IONIZATION
LASER RADIATION
LASERS
MIXING
OPTIMIZATION
PHASE STABILITY
PULSES
SPECTRA
STABILIZATION
WAVELENGTHS
COMPOSITE MODELS
ELECTROMAGNETIC RADIATION
MATHEMATICAL MODELS
PARTICLE MODELS
QUARK MODEL
RADIATIONS
STABILITY