材料科学
光纤
纤维
功率(物理)
模式(计算机接口)
光电子学
光学
复合材料
物理
计算机科学
热力学
操作系统
作者
Andrea Rosales-García,Rikke Hagensby Jensen,Poul Kristensen,Jeffrey W. Nicholson,Simona Ovtar,Marija Mitrović,Kasper Ingerslev,B. Edvold,Simon Christensen,Jose Pincha,D. J. DiGiovanni,B. Pálsdóttir
摘要
We report the performance of an LMA Yb-doped fiber, designed for increasing the transverse mode instability threshold and minimizing nonlinear effects in multi-kilowatt class fiber lasers, by reducing the thermo-optic coefficient of the fiber core, compared with that of standard aluminophosphosilicate Yb-doped fibers. A TMI-free 5.2 kW single-mode output power from a Yb 20/400 fiber with a 17.5 μm mode-field diameter was achieved in a broad bandwidth, co-pumped amplifier with 78% optical-to-optical efficiency, while a 4 kW signal output was attained in a 26 GHz linewidth amplifier. Negligible photodarkening loss was observed during 150 hour laser operation at 2 kW.
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