Abstract
We demonstrate a comparative analysis of directly diode-pumped Tm3+-doped all-fibre laser operating at 1908 nm with different structure at fibre end facets. The feedback arising from parasitic oscillations and amplified spontaneous emission can be suppressed by coating an anti-reflection on the forward end facet and cleaving an angle on the backward end facet. 44.1 W laser power on forward end at the pumped power of 120 W was achieved. The forward laser slope efficiency was 39.3%, corresponding to the backward laser slope efficiency of 3.0%. The beam quality factor of M2 was 1.4.
| Original language | English |
|---|---|
| Pages (from-to) | 1298-1301 |
| Number of pages | 4 |
| Journal | Journal of Modern Optics |
| Volume | 64 |
| Issue number | 13 |
| DOIs | |
| State | Published - 20 Jul 2017 |
Keywords
- All-fibre laser
- Tm-doped
- continuous wave
- end facets
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