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.
Original language | English |
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Article number | 105102 |
Number of pages | 5 |
Journal | Laser Physics Letters |
Volume | 16 |
Issue number | 10 |
DOIs | |
Publication status | Published - 25 Sep 2019 |
Keywords
- diode pumping
- fiber laser
- graded-index fiber
- Raman laser
- CW
- HIGH-POWER