The fiber laser based on an oscillating-amplifying integrated structure has the potential to benefit from the advantages of a fiber laser oscillator and amplifier with the characteristics of strong anti-back-reflected...The fiber laser based on an oscillating-amplifying integrated structure has the potential to benefit from the advantages of a fiber laser oscillator and amplifier with the characteristics of strong anti-back-reflected light ability and high efficiency.Here,we achieved a 3.5-kW near-single-mode(M^(2)~1.24)oscillating-amplifying integrated fiber laser with an active fiber length of 8 m in the oscillating section and 17.6 m in the amplifying section.While operating at the maximum power,the optical-to-optical conversion efficiency is 87.0%,and the intensity of stimulated Raman scattering is about23.61 dB lower than that of the signal light.To the best of the authors’knowledge,this is the highest output power of an oscillating-amplifying integrated fiber laser,accompanied with the best beam quality and the highest efficiency.展开更多
基金supported by the Training Program for Excellent Young Innovations of Changsha(Nos.kq2009004 and kq2009028)the National Natural Science Foundation of China(Nos.61735007 and 62005315)。
文摘The fiber laser based on an oscillating-amplifying integrated structure has the potential to benefit from the advantages of a fiber laser oscillator and amplifier with the characteristics of strong anti-back-reflected light ability and high efficiency.Here,we achieved a 3.5-kW near-single-mode(M^(2)~1.24)oscillating-amplifying integrated fiber laser with an active fiber length of 8 m in the oscillating section and 17.6 m in the amplifying section.While operating at the maximum power,the optical-to-optical conversion efficiency is 87.0%,and the intensity of stimulated Raman scattering is about23.61 dB lower than that of the signal light.To the best of the authors’knowledge,this is the highest output power of an oscillating-amplifying integrated fiber laser,accompanied with the best beam quality and the highest efficiency.
