Passively Q-switched high-repetition-rate Yb:LuGG channel waveguide laser
[EN]We report on a compact, passively Q-switched waveguide laser fabricated via femtosecond direct laser writing (fs-DLW) in an Yb:LuGG crystal. Prior to Q-switching experiments, continuous-wave operation was systematically characterized under various cavity configurations, achieving a maximum outpu...
| Authors: | , , , , , , , |
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| Format: | article |
| Status: | Published version |
| Publication Date: | 2025 |
| Country: | España |
| Institution: | Universidad de Salamanca (USAL) |
| Repository: | GREDOS. Repositorio Institucional de la Universidad de Salamanca |
| OAI Identifier: | oai:gredos.usal.es:10366/168577 |
| Online Access: | http://hdl.handle.net/10366/168577 |
| Access Level: | Open access |
| Keyword: | Fibre Lasers High-Field Lasers Laser Laser Technology Solid-State Lasers Ultrafast Lasers |
| Summary: | [EN]We report on a compact, passively Q-switched waveguide laser fabricated via femtosecond direct laser writing (fs-DLW) in an Yb:LuGG crystal. Prior to Q-switching experiments, continuous-wave operation was systematically characterized under various cavity configurations, achieving a maximum output power of 678 mW and a slope efficiency of 53.6% using a 70% output coupler. Passive Q-switching was implemented by incorporating single-walled carbon nanotubes (SWCNTs) as a saturable absorber, enabling stable laser operation over several hours. The 7.39-mm-long waveguide laser operated near 1030 nm, and its Q-switched performance was investigated using three output couplers with different transmissions. The best performance was obtained with a 50% output coupler, yielding pulses as short as 35 ns, a maximum output power of 478 mW, and a highest repetition rate of 2.51 MHz. These results demonstrate the excellent compatibility between fs-DLW-fabricated Yb:LuGG waveguides and SWCNT-based saturable absorbers, offering a promising route toward robust and highly efficient compact pulsed laser sources. |
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