METHOD AND DEVICE FOR OBTAINING AN OPTICAL DISCHARGE IN A GAS

摘要

The invention relates to the field of laser physics and laser technology and can be used in the development and production of laser-based plasma chemical systems. The method for obtaining an optical discharge in a gas comprises the optical breakdown of a gas to produce an absorbing plasma region and the maintaining of said region in the beam of a laser throughout the active period thereof. The method is novel in that the breakdown of a gas to produce a plasma region and the maintaining of said region is carried out in a laser resonator. The method is also novel in that the breakdown of a gas to produce a plasma region and the maintaining of said region is carried out in an additional resonator of a three-mirror laser resonator. The method is also novel in that the breakdown of a gas to produce a plasma region and the maintaining of said region is carried out in the focal region of a focused conical laser beam. The method is also novel in that the breakdown of a gas to produce a plasma region and the maintaining of said region is carried out in the focal region of a three-dimensional laser beam. The device for obtaining an optical discharge in a gas comprises a laser which is optically coupled to a focusing lens. The device is novel in that it additionally comprises a laser which is optically coupled to a focusing lens and a system for generating a circular beam in the form of a reflective axicon and a conical mirror, as well as a conical swivel mirror, wherein the angle of convergence of the conical beam is equal to 180°. The device is also novel in that it additionally comprises a laser in the form of a set of disk or diode laser segments situated on the surface of a sphere with a centre at the point at which the optical axes of said laser segments intersect.