Hollow-core-fiber(HCF)gas lasers(GLs)have garnered significant interest as a novel approach for generating mid-infrared lasers,owing to their inherent benefits of rich emission wavelength,high beam quality,and high ou...Hollow-core-fiber(HCF)gas lasers(GLs)have garnered significant interest as a novel approach for generating mid-infrared lasers,owing to their inherent benefits of rich emission wavelength,high beam quality,and high output power potential.However,they are mostly achieved by a free-space coupling structure,which has a major drawback of being prone to vibrations and other environmental variations.Here,we devise and implement an all-fiber-structure gas-filled HCF amplified spontaneous emission(ASE)source at 3.1μm based on the reverse tapering and angle-cleaved fusion splicing techniques.By optimizing the C_(2)H_(2) gas pressure,a maximum mid-infrared output power of 6.59 W was obtained,corresponding to a slope efficiency of 19.74%and neardiffraction-limited beam qualities of M_(x)^(2)=1.03 and M_(y)^(2)=1.06.Furthermore,with a similar all-fiber configuration,a CO_(2)-filled HCF ASE source at 4.3μm with output power exceeding 1.4 W was generated.To the best of our knowledge,the proposed all-fiber-structure HCF gas light source demonstrates the longest wavelength and highest power reported to date.The development of mid-infrared HCF gas light sources in an all-fiber configuration represents a significant step toward miniaturized HCF lasers,which hold promise as powerful new tools for application in laser medicine,space communication,and other scientific research.展开更多
基金National Natural Science Foundation of China(62035002)。
文摘Hollow-core-fiber(HCF)gas lasers(GLs)have garnered significant interest as a novel approach for generating mid-infrared lasers,owing to their inherent benefits of rich emission wavelength,high beam quality,and high output power potential.However,they are mostly achieved by a free-space coupling structure,which has a major drawback of being prone to vibrations and other environmental variations.Here,we devise and implement an all-fiber-structure gas-filled HCF amplified spontaneous emission(ASE)source at 3.1μm based on the reverse tapering and angle-cleaved fusion splicing techniques.By optimizing the C_(2)H_(2) gas pressure,a maximum mid-infrared output power of 6.59 W was obtained,corresponding to a slope efficiency of 19.74%and neardiffraction-limited beam qualities of M_(x)^(2)=1.03 and M_(y)^(2)=1.06.Furthermore,with a similar all-fiber configuration,a CO_(2)-filled HCF ASE source at 4.3μm with output power exceeding 1.4 W was generated.To the best of our knowledge,the proposed all-fiber-structure HCF gas light source demonstrates the longest wavelength and highest power reported to date.The development of mid-infrared HCF gas light sources in an all-fiber configuration represents a significant step toward miniaturized HCF lasers,which hold promise as powerful new tools for application in laser medicine,space communication,and other scientific research.
