Abstract
We present a numerical study on efficient mid-infrared Raman soliton generation in a tellurite microstructured optical fiber with femtosecond Tm-doped fiber laser pulses as the pump source. A tunable soliton exhibits a wavelength shift of up to 3.54 µm and a power conversion efficiency of up to 74.2% while consuming a pump peak power of no more than 1 kW at 1.96 µm, owing to the proper design of the dispersion and nonlinearity of the tellurite fiber. We investigated the effects of pump parameters on soliton properties and found that adjusting the pump pulse duration allows for a broader tuning range of up to 3.63 µm or a higher conversion efficiency of 94.5%. The study describes an effective means of constructing compact and efficient femtosecond tunable mid-infrared laser sources with low operation power, which will boost potential applications in the important region of above 2 µm.
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Funding
This work was supported by Grants from the Basic and Applied Basic Research Foundation of Guangdong Province (2021A1515110310) and the Research Platform and Project of Guangdong Province (2021KQNCX268).
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Both authors contributed to the study's conception and design. Material preparation, data collection, and analysis were performed by YY. The first draft of the manuscript was written by KX and both authors commented on previous versions of the manuscript. Both authors read and approved the final manuscript.
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Xiao, K., Ye, Y. Efficient mid-infrared Raman soliton frequency shift in a tellurite microstructured optical fiber. Opt Quant Electron 56, 594 (2024). https://doi.org/10.1007/s11082-023-06255-w
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DOI: https://doi.org/10.1007/s11082-023-06255-w