Q-Switched Pulse and Mode-Locked Pulse Generation From a Yb<sup>3+</sup>-Doped Fiber Laser Based on Bi<sub>2</sub>Se<sub>3</sub>
The Q-switched pulse and mode-locked pulse were investigated in an all-normal dispersion Yb-doped fiber laser (YDFL) based on the topological insulators (TIs) with mixing of polyvinyl alcohol (PVA) to produce Bi<sub>2</sub>Se<sub>3 </sub>/PVA film or deposition on...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
IEEE
2018-01-01
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| Series: | IEEE Photonics Journal |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/8332476/ |
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| Summary: | The Q-switched pulse and mode-locked pulse were investigated in an all-normal dispersion Yb-doped fiber laser (YDFL) based on the topological insulators (TIs) with mixing of polyvinyl alcohol (PVA) to produce Bi<sub>2</sub>Se<sub>3 </sub>/PVA film or deposition on the end facet of fiber to manufacture TI-compatible fiber. Through the dark Bi<sub> 2</sub>Se<sub>3</sub>/PVA films with large nonsaturable loss, the YDFL was operated in the Q-switched state. The repetition rate and the duration of the Q-switched pulses increased and declined, respectively, with the pump power to show 2.2 μs duration and 137.8 kHz repetition rate at the highest pump power. Moreover, the mode-locked pulses, with a 16 MHz repetition rate and 380 ps pulsewidth, were generated at high pump power by using the light Bi<sub>2</sub>Se<sub>3</sub>/PVA film. By means of a Bi<sub>2</sub>Se<sub>3</sub> compatible fiber, through optical deposition of the Bi<sub>2</sub>Se<sub>3</sub> nanoplatelets on the end facet of the fiber, the mode-locked YDFL was generated at low-threshold pump power and revealed more stabilized operation state up to two hours. |
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| ISSN: | 1943-0655 |