The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
General restrictions arising from gain-narrowing and phase-matching are circumvented by employing parametric amplification in the frequency rather than the time domain. Frequency-domain OPA has been used for amplifying few-cycle pulses and for high gain amplification.
The universal dilemma gain narrowing (the more one amplifies a laser pulse, the longer gets its duration) for fs amplifiers which prevents ultra high power lasers from delivering few-cycle pulses. This problem is overcome by a new amplification concept: Fourier plane Optical Parametric Amplifier — FOPA. It enables simultaneous up-scaling of peak power and amplified spectral bandwidth and can be operated...
Employing parametric amplification in the Fourier domain rather than in time domain circumvents phase mismatch and damage threshold limitations of laser amplifiers and enabled CEP stable, 1.43mJ, sub-two cycle pulses at 1.8μm.
Stereo above threshold ionization in xenon was studied with CEP stable few-cycle IR laser pulses. Strong CEP dependence was revealed both for directly ionized and rescattered electrons for pulse durations from 2 to 5 cycles.
We report sub-mJ carrier envelope phase (CEP) stable 1.6 cycle pulses at 1.8μm. With those pulses, we have obtained 160eV cut-off in argon at an intensity of 1.4×1014W/cm2 using the process of high harmonic generation.
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.