FIELD: optical engineering.
SUBSTANCE: device has antistokes frequency converter made in form of set of active light guides; converter is optically conjugated with input optical system and with pumping radiation source. Device also has second pumping radiation source which is optically conjugated with envelope of active light guides. The envelope of active light guides is made of material which has centers of antistokes cooling.
EFFECT: improved sensitivity; equalization of threshold sensitivity of active light guides; improved efficiency of operation.
3 cl, 5 dwg
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