Abstract
A single-frequency distributed-Bragg-reflector fiber laser at 980 nm with a quantum defect of less than 0.6% was developed with a 1.5-cm 12 wt% ytterbium-doped phosphate fiber pumped by a 974.5-nm laser diode. Linearly polarized single-longitude-mode laser with a polarization extinction ratio (PER) of nearly 30 dB and spectral linewidth of less than 1.8 kHz was obtained. A maximum output power of 275 mW was measured at a launched pump power of 620 mW. The performance of the single-frequency fiber laser pumped at 909 nm and 976 nm was also characterized. This research demonstrated an approach to high-power single-frequency fiber laser oscillators with mitigated thermal effects.
Original language | English (US) |
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Pages (from-to) | 3817-3820 |
Number of pages | 4 |
Journal | Optics letters |
Volume | 48 |
Issue number | 14 |
DOIs | |
State | Published - Jul 15 2023 |
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics