Laser has a phase conjugation mirror by the mixture has four waves and method of renovation of a conventional laser by transformation of a laser has a phase conjugation mirror.

摘要

The invention concerns a phase-conjugation laser mirror by four-wave mixing in its amplifying medium (2), wherein said mirror (9) is generated by exclusively passive means (5-8). A single amplifying medium (2) is provided in a Fabry-Perot cavity and the passive means (5-8) are arranged to generate pump beams forming a distribution wave in said cavity. The laser is well adapted to machining materials.