Abstract
High beam quality and narrow spectrum have been obtained in a Raman fiber laser based on a 1.1 km long graded-index fiber directly pumped by a multimode 915 nm laser diode. The generation of a near-diffraction-limited beam at 954 nm with M2 ≤ 1.27 and Δλ = 0.42 nm at an output power above 10 W is enabled by a cavity mirror made of a special fiber Bragg grating inscribed by a femtosecond technique in the central part of the graded-index fiber core.
Original language | English |
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Pages (from-to) | 9-12 |
Number of pages | 4 |
Journal | Optics Letters |
Volume | 42 |
Issue number | 1 |
DOIs | |
Publication status | Published - 1 Jan 2017 |