Broadband 2.12 GHz Ti:sapphire laser compressed to 5.9 femtoseconds using MIIPS

Abstract

We report a self-starting prismless femtosecond Ti:sapphire ring laser whose repetition rate has been gradually increased from 1 to 2.12 GHz. A broadband spectrum extending from 650 to 1040 nm, in which 17% of the intracavity power is generated in a single-pass through the crystal, is preserved in spite of the reduction in peak power. An average power of 0.95 W was obtained for 7.5 W of pump power, with very stable operation verified over 22 hours. Pulses from this laser have been fully characterized in spectral phase, and then compressed to 5.9 femtoseconds using multiphoton intrapulse interference phase scan (MIIPS).

Propagación de pulsos ultracortos en sistemas refractivos

“…Actualmente, la generación y utilización de pulsos ultracortos constituye uno de los campos de más rápido avance en la física moderna. Se ha llegado a generar pulsos ultracortos menores a 6fs [53]. Sin embargo la corta duración de estos pulsos es una limitante en la medida su ancho temporal, debido a la relativa lentitud de respuesta de cualquier equipo electrónico, esto es, porque no hay un detector que tenga una respuesta del orden de femtosegundos, por lo que existen técnicas indirectas, como la autocorrelación óptica de segundo orden [54,55], que permite medir el ancho temporal de los pulsos ultracortos.…”

Bandwidth-limited few-cycle pulses by nonlinear compression in a dispersion-alternating fiber

“…To generate ultra-short optical pulses, a broad bandwidth is necessary. For instance, gain media like titanium:sapphire crystals offer a broad bandwidth for the generation of pulses with durations down to a few femtoseconds [8]. Gain media doped with chromium ions provide enough bandwidth for the generation of ultra-short pulses in the telecom wavelength range [9], e.g., for high-speed optical time-division multiplexing [7].…”

The effects of TGG crystal length on output power and beam quality of a unidirectional ring Nd:YVO4laser with and without second harmonic generation

“…Intracavity second harmonic generation (SHG) in longitudinal diode end pumped Nd : YVO 4 lasers with KTP and LBO nonlinear crystals is a common method to produce continuous wave green lasers with low intensity noise and good beam quality. These systems have numerous applications in science and technology [1][2][3]. The main challenge in this type of laser is intensity noise due to nonlinear coupling of longitudinal modes, referred to as the green problem.…”