High efficiency holmium-doped triple-clad fiber laser at 2120 nm
نویسندگان
چکیده
We developed a new holmium-doped triple-clad fiber (Ho-3CF), reducing the clad diameter to improve overlap between pump and doped-core, holmium concentration reduce influence of ion clustering on laser efficiency. illustrate here performance this in oscillator configuration. The emission is centered at 2.12 m by Bragg grating, active pumped 1.94 m thulium-doped laser. slope efficiency reaches 73 % with respect absorbed power (60% considering coupled power), for maximum signal 62 W delivered quasi single spatial mode (M$^{2}$=1.2). To best our knowledge, highest reported high clad-pumped emitting wavelength higher than 2.1 m. also analyze experimentally impact Numerical Aperture (NA), input Ho-3CF, Finally, we use numerical simulation comment choice wavelength.
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ژورنال
عنوان ژورنال: Journal of Lightwave Technology
سال: 2022
ISSN: ['0733-8724', '1558-2213']
DOI: https://doi.org/10.1109/jlt.2022.3196807