Showing papers by "Michael Mazilu published in 2000"
07 May 2000
TL;DR: In this article, an improved frequency domain phase measurement (FDPM) was presented, which employs only linear passive filters with a nonlinear time integrating detector incorporated to measure a phase-dependent signal.
Abstract: Summary form only given. Characterization of ultrashort light pulses is a primary concern of the researcher working with mode-locked lasers. Here we present an improved frequency domain phase measurement (FDPM). This configuration employs only linear passive filters with a nonlinear time integrating detector incorporated to measure a phase-dependent signal. In our setup we used a nonlinear detector operating by two-photon absorption. The signal measured by this detector depends in a nonlinear way on the phase of the spectrum.
2 citations
01 Jan 2000
TL;DR: In this paper, phase measurement of ultrashort pulse of an optical parametric oscillator in frequency domain is described, which consists of a Michelson interferometer monitored by a two-photon absorbing detector.
Abstract: We describe phase measurement of ultrashort pulse of an optical parametric oscillator in frequency domain. The setup consist of a Michelson interferometer monitored by a two-photon absorbing detector. The results are compared to the theory.
01 Jan 2000
TL;DR: In this paper, a new formalism for the study of the time evolution of ultrashort pulses which experience gain-guiding and self-focusing was developed, which can be readily applied to describe transmission through stationary or moving linear optical elements.
Abstract: We have developed a new formalism for the study of the time evolution of ultrashort pulses which experience gain-guiding and self-focusing. In contrast to alternative procedures describing spatially non-dispersive beam propagation, such as Hillion's focused wave modes, this new method can be readily applied to describe transmission through stationary or moving linear optical elements. Further, our method describes the time dependence within the framework of the classical Gaussian ABCD matrices, which makes generalisation to 4 x 4 'ray-pulse' matrices unnecessary. With this formalism, we have treated Kerr-lensing to be equivalent to the effect of a moving lens in a straightforward manner. Additionally, we can treat time-dependent pulses with this formalism and hence we can determine the influence of the input pulse shape on these nonlinear effects. This method can be extended to an investigation of the initiation and evolution of self-modelocking. In order to deduce a traveling Gaussian beam solution, we use Maxwell's wave equations in conjunction with the paraxial approximation.
13 Nov 2000
TL;DR: In this article, phase measurement of ultrashort pulse of an optical parametric oscillator in frequency domain is described, which consists of a Michelson interferometer monitored by a two-photon absorbing detector.
Abstract: We describe phase measurement of ultrashort pulse of an optical parametric oscillator in frequency domain The setup consist of a Michelson interferometer monitored by a two-photon absorbing detector The results are compared to the theory
13 Nov 2000
TL;DR: In this paper, a new formalism for the study of the time evolution of ultrashort pulses which experience gain-guiding and self-focusing was developed, which can be readily applied to describe transmission through stationary or moving linear optical elements.
Abstract: We have developed a new formalism for the study of the time evolution of ultrashort pulses which experience gain-guiding and self-focusing. In contrast to alternative procedures describing spatially non-dispersive beam propagation, such as Hillion's focused wave modes, this new method can be readily applied to describe transmission through stationary or moving linear optical elements. Further, our method describes the time dependence within the framework of the classical Gaussian ABCD matrices, which makes generalisation to 4 x 4 'ray-pulse' matrices unnecessary. With this formalism, we have treated Kerr-lensing to be equivalent to the effect of a moving lens in a straightforward manner. Additionally, we can treat time-dependent pulses with this formalism and hence we can determine the influence of the input pulse shape on these nonlinear effects. This method can be extended to an investigation of the initiation and evolution of self-modelocking. In order to deduce a traveling Gaussian beam solution, we use Maxwell's wave equations in conjunction with the paraxial approximation.
07 May 2000
TL;DR: In this paper, the authors incorporated two saturable-Bragg-reflectors (SBRs) into a dual-cavity mode-locked Ti:sapphire laser for the first time to their knowledge creating a stable, selfstarting, independently tunable, two-color femtosecond source.
Abstract: Summary form only given.We have incorporated two saturable-Bragg-reflectors (SBRs) into a dual-cavity mode-locked Ti:sapphire laser for the first time to our knowledge creating a stable, self-starting, independently tunable, two-color femtosecond source. The SBR mode-locking has allowed us to investigate the pulse-to-pulse coupling of the two laser cavities via the nonlinear interaction in the laser crystal. This laser source has immediate applications in nondegenerate pump-probe spectroscopy.