Ionization of noble gases with pulses directly from a laser oscillator

Abstract

A Ti:sapphire oscillator with an extended cavity generates pulses with 0.5 microJ energy at a repetition rate of 6 MHz and pulse durations of 50 fs. Tight focusing creates peak intensities exceeding 10(14) W/cm2, which is sufficient for ionizing helium, a nonlinear process where at least 17 photons are absorbed simultaneously.

Hybrid dc–ac electron gun for fs-electron pulse generation

“…The best way to minimize phase jitter is to derive the laser pulses directly from an oscillator locked to the RF driver of the cavity. Recently, lasers with extended oscillator length have been developed and demonstrated to emit sub-100-fs pulses approaching the micro Joule level at a repetition rate of a few MHz [23,24].…”

Investigation of a 200-nJ chirped-pulse Ti:Sapphire oscillator for white light generation

“…The corresponding spectral content may be sufficient for several experiments these oscillators are ideal for, such as material processing and nanofabrication, but especially some spectroscopic, pumpprobe and strong-field-like experiments call for broadening the output spectrum (and eventually pulse compression, if few-cycles pulses are necessary). Even though a way to overcome this problem is to evacuate the cavity thereby eliminating the need for chirped mirrors, the bandwidth of such an oscillator is also limited to 35 − 40 nm [5]. In this paper we report on cavity length and dispersion optimization of a chirped pulse oscillator to maximize the intensity of the outcoupled pulses for a given pump laser.…”

High-energy laser pulses directly from the oscillator

“…This observation proves the high peak power and absence of multiple pulsing. The beam quality is of major importance for the final intensity and was measured to be M 2 < 1.1 in both axes, allowing in principle for intensities beyond 10 15 W/cm 2 assuming perfect focusing to the diffraction limit [11].…”