Showing papers by "Jérôme Bourderionnet published in 2000"
TL;DR: A new method of realizing phase plates by phase-volume holography on a photopolymer film by implementing such a component in a diode-pumped Nd:YAG oscillator to control the output spatial beam profile.
Abstract: We present a new method of realizing phase plates by phase-volume holography on a photopolymer film. We implement such a component in a diode-pumped Nd:YAG oscillator to control the output spatial beam profile. Flattop super-Gaussian and square-shaped beams are obtained.
16 citations
01 Jan 2000
TL;DR: In this paper, a phase hologram written on a photopolymer film inside the cavity is used to control the mode shape of a laser beam, which is useful to maximize modal discrimination while maintaining a large mode volume in gain medium.
Abstract: Summary form only given. Mode shaping of a laser beam is useful to maximize modal discrimination while maintaining a large mode volume in gain medium, and for any application for which a specified beam profile is required. Recently, it has been shown that diffractive optical elements in laser cavities permits to achieve beam shaping. Such diffractive elements are generally fabricated using photolithographic process with electron-beam, reactive-ion etching and multiple binary masks. Our goal is to use a phase hologram written on a photopolymer film inside the cavity to control the mode shape. With this approach, the diffractive element is simple and fast to fabricate, is potentially low cost and offers much more flexibility.
1 citations
10 Sep 2000
TL;DR: In this paper, the authors consider the intracavity beam steering architectures based on the conjugate resonator arrangement and propose a two-dimensional spatial light modulator (SLM).
Abstract: Summary form only. Fast and precise beam pointing and deflection is a need in most industrial laser applications such as material processing, range finding and tracking. Classical methods of angular beam scanning basically involve mechanical or acousto-optic devices which may have limited performances respectively due to their long response time because of inertia, or limited optical efficiency. To overcome these limitations we propose to reconsider the intracavity beam steering architectures based on the conjugate resonator arrangement. It consists of a multimode cavity including Fourier transform lenses and whose transverse spatial mode is controlled by a two dimensional spatial light modulator (SLM).