Pure silica fiber Raman gain enabled high-power low-quantum defect fiber laser

Ma, Xiaoya; Zhang, Yang; Ye, Jun; Xu, Jiangming; Leng, Jinyong; Zhang, Pu

doi:10.1016/j.optlastec.2022.108833

Cited by 7 publications

(2 citation statements)

References 42 publications

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“…saturation [6], amplified spontaneous emission (ASE) [7], and photo-darkening (PD) [8]. In addition, compared to Raman fiber lasers (RFLs) based on SRS effect, RE-ions exhibit fixed energy transitions between electron orbitals [9,10], imposing limitations on their emission wavelengths to specific ranges [11][12][13]. Thus it is challenging to obtain high power laser at any spectral range.…”

Section: Introductionmentioning

confidence: 99%

“…It has been treated as one of the most prospective solutions for laser generation in special bands [15][16][17][18]. Meanwhile, compared to RE-doped fiber lasers, both the relatively low quantum defect and hundred-meter level passive fiber in RFLs contribute to effectively alleviating the thermal load under high power operation [12]. These advantages are of great significance for solving the aforementioned problems of the active fiber scheme [19,20].…”

Section: Introductionmentioning

confidence: 99%

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Kilowatt Raman Fiber Laser Directly Pumped by Spectrally-Combined Diodes

Hao,

Li,

Fan

et al. 2024

J. Lightwave Technol.

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Raman fiber lasers (RFLs), relying primarily on stimulated Raman scattering (SRS) and directly pumped by laser diodes (LDs), offer a valuable avenue for exploring nonlinear photonics, molecular vibrational imaging, and passive photonic devices. However, the obstacles of the poor pump brightness and higher-order Stokes generation limit the further power scaling of those lasers. Herein, to improve the pump brightness and suppress higher-order Stokes, fifteen wavelength-combined multimode LDs are used as pump sources for cladding-pumped triple-clad fiber. The output power reached 1082W at the wavelength of 1020nm. The overall slope efficiency is 81.9% and the optical-optical conversion efficiency is 49.4%. To the best of our knowledge, this is the highest power output for RFLs directly pumped by multimode LDs. The fusion of spectral combination multi-wavelength diodes pumping technology and the use of multi-cladding fiber may provide a promising way of achieving high-power special wavelengths fiber sources.

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