Pump quantum efficiency optimization of 3.5 µm Er-doped ZBLAN fiber laser for high-power operation
Received date: 23 Aug 2023
Accepted date: 12 Oct 2023
Copyright
976 nm + 1976 nm dual-wavelength pumped Er-doped ZBLAN fiber lasers are generally accepted as the preferred solution for achieving 3.5 µm lasing. However, the 2 µm band excited state absorption from the upper lasing level (4F9/2 → 4F7/2) depletes the Er ions population inversion, reducing the pump quantum efficiency and limiting the power scaling. In this work, we demonstrate that the pump quantum efficiency can be effectively improved by using a long-wavelength pump with lower excited state absorption rate. A 3.5 µm Er-doped ZBLAN fiber laser was built and its performances at different pump wavelengths were experimentally investigated in detail. A maximum output power at 3.46 µm of ∼ 7.2 W with slope efficiency (with respect to absorbed 1990 nm pump power) of 41.2% was obtained with an optimized pump wavelength of 1990 nm, and the pump quantum efficiency was increased to 0.957 compared with the 0.819 for the conventional 1976 nm pumping scheme. Further power scaling was only limited by the available 1990 nm pump power. A numerical simulation was implemented to evaluate the cross section of excited state absorption via a theoretical fitting of experimental results. The potential of further power scaling was also discussed, based on the developed model.
Key words： Fiber laser; Mid-infrared; Er-doped ZBLAN fiber; Dual-wavelength pumping
Lu Zhang , Shijie Fu , Quan Sheng , Xuewen Luo , Junxiang Zhang , Wei Shi , Jianquan Yao . Pump quantum efficiency optimization of 3.5 µm Er-doped ZBLAN fiber laser for high-power operation[J]. Frontiers of Optoelectronics, 2023 , 16(4) : 33 . DOI: 10.1007/s12200-023-00089-w
| 1 |
Ebrahim-Zadeh,M., Sorokina, I.T.: Mid-Infrared Coherent Sources and Applications. Springer, Dordrecht (2008)
|
| 2 |
Majewski,M.R., Bharathan, G., Fuerbach,A., Jackson,S.D.: Long wavelength operation of a dysprosium fiber laser for polymer processing. Opt. Lett. 46(3), 600–603 (2021)
|
| 3 |
Fortin,V., Bérubé, J.P., Fraser,A., Vallée,R.: Resonant polymer ablation using a compact 3.44 µm fiber laser. J. Mater. Process. Technol. 252, 813–820 (2018)
|
| 4 |
Többen,H.: CW Lasing at 3.45 µm in erbium-doped fluorozirconate fibres. Frequenz 45(10), 250–252 (1991)
|
| 5 |
Többen,H.: Room temperature cw fiber laser at 3.5 µm in Er3+- doped ZBLAN glass. Electron. Lett. 28(14), 2–3 (1992)
|
| 6 |
Henderson-Sapir,O., Munch, J., Ottaway,D.J.: Mid-infrared fiber lasers at and beyond 3.5 µm using dual-wavelength pumping. Opt. Lett. 39(3), 493–496 (2014)
|
| 7 |
Qin,Z., Hai,T., Xie,G., Ma, J., Yuan,P., Qian,L., Li,L., Zhao,L., Shen, D.: Black phosphorus Q-switched and mode-locked mid-infrared Er:ZBLAN fiber laser at 3.5 µm wavelength. Opt. Express 26(7), 8224–8231 (2018)
|
| 8 |
Fortin,V., Maes,F., Bernier,M., Bah, S.T., D’Auteuil,M., Vallée,R.: Watt-level erbium-doped all-fiber laser at 3.44 µm. Opt. Lett. 41(3), 559–562 (2016)
|
| 9 |
Maes,F., Fortin, V., Bernier,M., Vallée,R.: 5.6 W monolithic fiber laser at 3.55 µm. Opt. Lett. 42(11), 2054–2057 (2017)
|
| 10 |
Luo,H., Yang,J., Liu,F., Hu, Z., Xu,Y., Yan,F., Peng,H., Ouellette,F., Li,J., Liu,Y.: Watt-level gain-switched fiber laser at 3.46 µm. Opt. Express 27(2), 1367–1375 (2019)
|
| 11 |
Lemieux-Tanguay,M., Fortin, V., Boilard,T., Paradis,P., Maes,F., Talbot,L., Vallée, R., Bernier,M.: 15 W Monolithic fiber laser at 3.55 µm. Opt. Lett. 47(2), 289–292 (2021)
|
| 12 |
Henderson-Sapir,O., Malouf, A., Bawden,N., Munch,J., Jackson, S.D., Ottaway,D.J.: Recent advances in 3.5 µm Erbium doped mid-infrared fiber lasers. IEEE J. Sel. Top. Quantum Electron. 23(3), 0900509 (2017)
|
| 13 |
Qin,Z., Xie,G., Ma,J., Yuan, P., Qian,L.: Mid-infrared Er: ZBLAN fiber laser reaching 3.68 µm wavelength. Chin. Opt. Lett. 15(11), 111402 (2017)
|
| 14 |
Maes,F., Fortin, V., Bernier,M., Vallee,R.: Quenching of 3.4 µm dual-wavelength pumped erbium doped fiber lasers. IEEE J. Quantum Electron. 53(2), 1–8 (2017)
|
| 15 |
Wang,J., Yeom,D., Simakov,N., Hemming, A., Carter,A., Lee,S., Lee,K.: Numerical modeling of in-band pumped Ho-doped silica fiber lasers. J. Lightwave Technol. 36(24), 5863–5880 (2018)
|
| 16 |
Marcuse,D.: Loss analysis of single-mode fiber splices. Bell Syst. Tech. J. 56(5), 703–718 (1977)
|
| 17 |
Sujecki,S.: An efficient algorithm for steady state analysis of fibre lasers operating under cascade pumping scheme. Int. J. Electron. Telecommun. 60(2), 143–149 (2014)
|
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| 〈 |
|
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