FIELD: laser technology. SUBSTANCE: device to transmit powerful laser radiation has fibrous light guide placed into hose with circulating cooling agent, systems of radiation input and output incorporating lens and hermetic cavity filled with liquid cooling agent with capability of its pumping through, where end of light guide is located. Rod made from material letting laser radiation through is installed between lens and butt of light guide, at distance 100-200 μm from light guide. Rod is sealed in case and hermetic cavity is limited by butt of rod located opposite to butt of light guide. EFFECT: facilitated manufacture, improved operational characteristics. 4 dwg
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