FIBRE LASER WITH INTRA-CAVITY FREQUENCY DOUBLING

The invention disclosed herein relates to fibre lasers with intra-cavity frequency doubling. In one embodiment, the invention is directed to a Fibre laser with intra-cavity frequency doubling characterized in that a non-linear crystal (NC) of type II phase matching is used to thereby enable operatio...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	BABIN, SERGEI ALEXEEVICH, KABLUKOV, SERGEI IVANIVICH, AKULOV, VLADIMIR ALEXANDROVICH, CHURKIN, DMITRY VLADIMIROVICH
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	BASIC ELECTRIC ELEMENTS DEVICES USING STIMULATED EMISSION ELECTRICITY
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Beschreibung
Zusammenfassung:	The invention disclosed herein relates to fibre lasers with intra-cavity frequency doubling. In one embodiment, the invention is directed to a Fibre laser with intra-cavity frequency doubling characterized in that a non-linear crystal (NC) of type II phase matching is used to thereby enable operation of the fibre laser without selection of polarisation of the generated fundamental radiation. The non-linear crystal (NC) is oriented so as to minimise the walk-off angle of the second harmonic radiation, and a second dichroic mirror (M2) together with one of a plurality of focusing elements (L3) forms a telescopic reflector (L3, M2) that provides for focusing and compensation of the spatial walk-off effect of the non-linear crystal (NC).