Quasi-continuous-wave-pumped thulium-doped fiber laser with 0.2 kW of instantaneous output power
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arXiv
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| Main Authors: | , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866909412366483456 |
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| author | Hou, Changshun Zhai, Ziwei Choudhury, Nilotpal Harris, Tom Sahu, Jayanta K. Nilsson, Johan |
| author_facet | Hou, Changshun Zhai, Ziwei Choudhury, Nilotpal Harris, Tom Sahu, Jayanta K. Nilsson, Johan |
| contents | A thulium-doped fiber laser operating quasi-continuous-wave generated 198 W of instantaneous output power in 0.2-ms pulses at 50 Hz repetition rate. The duty cycle becomes 1% and the average output power 2.0 W. This was cladding-pumped with 408 W from 0.79-um diode lasers (average pump power 4.1 W). The pump switch-on time was ~10 us at full power, with the laser exhibiting relaxation oscillations starting ~5 us after the start of the pumping and lasting for ~5 us. The slope efficiency with respect to absorbed pump power was 67% up to 200 W of absorbed pump power and 52% at the full 352 W of absorbed pump power. The low duty cycle simplified the heatsinking, despite the high instantaneous power and thermal load. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_01793 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Quasi-continuous-wave-pumped thulium-doped fiber laser with 0.2 kW of instantaneous output power Hou, Changshun Zhai, Ziwei Choudhury, Nilotpal Harris, Tom Sahu, Jayanta K. Nilsson, Johan Optics A thulium-doped fiber laser operating quasi-continuous-wave generated 198 W of instantaneous output power in 0.2-ms pulses at 50 Hz repetition rate. The duty cycle becomes 1% and the average output power 2.0 W. This was cladding-pumped with 408 W from 0.79-um diode lasers (average pump power 4.1 W). The pump switch-on time was ~10 us at full power, with the laser exhibiting relaxation oscillations starting ~5 us after the start of the pumping and lasting for ~5 us. The slope efficiency with respect to absorbed pump power was 67% up to 200 W of absorbed pump power and 52% at the full 352 W of absorbed pump power. The low duty cycle simplified the heatsinking, despite the high instantaneous power and thermal load. |
| title | Quasi-continuous-wave-pumped thulium-doped fiber laser with 0.2 kW of instantaneous output power |
| topic | Optics |
| url | https://arxiv.org/abs/2412.01793 |