Centre National De La Recherche Scientifique

Nanolase S.a.

Alain Brun

Patrick Georges

Gilles Pauliat

Frederic Druon

Francois Daniel Balembois

Pierre Jean Devilder

G&eacute;rald Roosen

Jean-Michel Jonathan

Nicolas Huot

Laser type source of coherent luminous radiation including a resonant cavity, an amplification medium placed in the resonant cavity and a dynamic photosensitive material which is placed in the resonant cavity to form a self-adapting spectral and/or spatial filter, characterized in that the cavity is a ring laser cavity and in that the dynamic photosensitive material is placed at the intersection of two beams.

Self-adapting filters for fine-tuning laser emissions

A sub-nanosecond passively Q-switched microchip laser is disclosed. It combines an optically pumped, passively Q-switched, high-frequency, microchip laser producing short pulses with an optically end-pumped amplifier producing high small-signal gain while pumped at low power. The microchip laser for emitting pulsed laser radiation is a monolithic body comprising two reflective elements defining an optical resonator for laser radiation, a laser gain medium, e.g., Nd:YAG, and a saturable absorber medium, e.g., Cr :YAG placed inside said resonator. The optical amplifier stage for amplifying the laser radiation comprises an amplifying medium, e.g., Nd:YVO . The microchip laser and the amplifier are optically end-pumped, preferably by high-brightness diodes. This entirely passive laser system directly produces &mgr;J pulses at repetition rates of about 45 kHz.

Sub-nanosecond passively q-switched microchip laser system

Growing community of inventors

Orsay, France

Alain Brun