We demonstrate widely wavelength-tunable continuous-wave (CW) and Q-switched Er3+-doped ZBLAN fluoride fiber lasers operating around 3 μm enabled by a volume Bragg grating (VBG). In the CW operation regime, a total wavelength tuning range of over 160-nm spanning from 2694 to 2854 nm has been achieved. For the Q-switched mode of operation, a slightly modified resonator configuration, incorporating a passive Q-switcher, topological insulator Bi2Te3 nanosheets, can produce stable pulse trains with a pulse width of 880 ns at a repetition rate of 81 kHz, while maintaining a wavelength tuning range of 62 nm from 2762 to 2824 nm through adjusting the VBG. In both operation regimes, the output spectral width is measured to be <;0.3 nm (full-width at half-maximum) over the whole tuning range. Our work both demonstrates the great wavelength-tuning potential of the Er3+ -doped fluoride fiber laser, and also paves a way for the development of a range of high-performance midinfrared laser sources.
|Number of pages||7|
|Journal||IEEE Journal of Selected Topics in Quantum Electronics|
|Early online date||28 Jun 2017|
|Publication status||Published - May 2018|
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Funding: European H2020 (MSCA-IF Grant 701493); National Natural Science Fund Foundation of China (61475102, 61505124 and 61505122, and 61605166); Science and Technology Planning Project of Guangdong Province (2016B050501005); and Educational Commission of Guangdong Province of
- fiber lasers
- topological insulator
- wavelength tunable