976 nm all-fiber Raman laser with high beam quality at multimode laser diode pumping. (25th September 2019)

• Record Type: Journal Article
• Authors: Kuznetsov, A G; Kablukov, S I; Wolf, A A; Nemov, I N; Tyrtyshnyy, V A; Myasnikov, D V; Babin, S A
• Is Part Of: Laser physics letters. Volume 16:Number 10(2019:Oct.)
• Publication Date: 2019-09-25
• Subjects: Raman laser -- graded-index fiber -- fiber laser -- diode pumping; Lasers -- Periodicals; Physics -- Periodicals; 621.366
• DOI: 10.1088/1612-202X/ab4281
• Languages: English
• ISSNs: 1612-2011

Abstract

Abstract: A 976 nm all-fiber Raman laser enabling high beam quality at direct multimode laser diode pumping with low beam quality ( M 2 > 30) is demonstrated. The laser is performed in a 100/140 multimode graded-index fiber with special in-fiber Bragg gratings that secure generation of the Stokes beam with relatively good quality ( M 2 ⩽ 2) and high slope efficiency of the pump-to-Stokes conversion (70%) at output powers of up to ~50 W.