通过动态蒸馏提纯技术制备了高纯Ge-As-Se和Ge-As-S硫系玻璃。采用两步棒管法拉制了以Ge-As-Se玻璃为纤芯、Ge-As-S玻璃为包层的小芯径阶跃折射率光纤,并使用飞秒激光抽运光纤测试了超连续谱的产生。以Al和GaCl_3分别作为除氧剂和C/H纯...通过动态蒸馏提纯技术制备了高纯Ge-As-Se和Ge-As-S硫系玻璃。采用两步棒管法拉制了以Ge-As-Se玻璃为纤芯、Ge-As-S玻璃为包层的小芯径阶跃折射率光纤,并使用飞秒激光抽运光纤测试了超连续谱的产生。以Al和GaCl_3分别作为除氧剂和C/H纯化剂可以有效消除玻璃中的C、H和O杂质。制备的Ge As Se/Ge As S光纤在2~9μm波段表现出优异的传输性能,光纤数值孔径约为1.3;采用重复频率为10.5 MHz、脉冲宽度为320 fs、中心波长为4.0μm、峰值功率为4.6 k W激光抽运长度为22 cm、芯径为6μm的光纤,获得了覆盖1.9~8.2μm、光谱平坦度为±10 d B、平均功率为4.5 m W的超连续谱。展开更多
采用熔融淬冷法制备了Ge_(15)Sb_(20)Se_(65)硫系玻璃,并拉制成直径为500μm的裸玻璃光纤,损耗测量结果显示光纤在6μm波长处的最低损耗为1.68dB/m。利用自行搭建的自动光纤拉锥平台拉制了腰锥直径分别为20,100,250μm的拉锥光纤,并对...采用熔融淬冷法制备了Ge_(15)Sb_(20)Se_(65)硫系玻璃,并拉制成直径为500μm的裸玻璃光纤,损耗测量结果显示光纤在6μm波长处的最低损耗为1.68dB/m。利用自行搭建的自动光纤拉锥平台拉制了腰锥直径分别为20,100,250μm的拉锥光纤,并对不同浓度的乙醇溶液进行了光谱分析检测实验,最后基于光纤倏逝波理论用COMSOL Multi physics软件仿真了三种不同腰锥直径的锥形光纤对乙醇溶液的传感灵敏特性,与实验结果进行了对比。展开更多
采用反复蒸馏提纯技术和开放式动态蒸馏相结合的工艺,制备了高纯As-S玻璃,基本消除了玻璃在2.9、4和6.3μm处的杂质吸收。利用旋转法制备出壁厚均匀、表面质量优异的硫系玻璃套管。采用棒管法拉制出丝径50μm,芯径40μm具有芯包结构的...采用反复蒸馏提纯技术和开放式动态蒸馏相结合的工艺,制备了高纯As-S玻璃,基本消除了玻璃在2.9、4和6.3μm处的杂质吸收。利用旋转法制备出壁厚均匀、表面质量优异的硫系玻璃套管。采用棒管法拉制出丝径50μm,芯径40μm具有芯包结构的硫系玻璃光纤。拉制的As-S光纤机械性能和光学性能优异,光纤丝径波动小于1%,弯曲半径优于4 mm,中红外波段损耗基线小于0.5 d B/m。制备出像元呈正方形排列,出端规格64×9,入端规格192×3,用于线–面转换的红外传像束,像束断丝率为2.7%。利用该异型传像束成功实现了长线阵的红外推扫成像。展开更多
Based on the designed As_2Se_3 and As_2S_3 chalcogenide glass photonic crystal fiber(PCF) and the scalar nonlinear Schrdinger equation,the effects of pump power and wavelength on modulation instability(MI) gain are ...Based on the designed As_2Se_3 and As_2S_3 chalcogenide glass photonic crystal fiber(PCF) and the scalar nonlinear Schrdinger equation,the effects of pump power and wavelength on modulation instability(MI) gain are comprehensively studied in the abnormal dispersion regime of chalcogenide glass PCF.Owing to high Raman effect and high nonlinearity,ultra-broadband MI gain is obtained in chalcogenide glass PCF.By choosing the appropriate pump parameter,the MI gain bandwidth reaches 2738 nm for the As_2Se_3 glass PCF in the abnormal-dispersion region,while it is 1961 nm for the As_2S_3 glass PCF.展开更多
As mid-infrared(MIR) lasers show numerous applications in the field of defense, medical, materials processing, and optical communications. Investigation on MIR Raman fiber lasers(RFLs) increasingly becomes a hot topic...As mid-infrared(MIR) lasers show numerous applications in the field of defense, medical, materials processing, and optical communications. Investigation on MIR Raman fiber lasers(RFLs) increasingly becomes a hot topic. Compared with the traditional silica fibers, fluoride and chalcogenide glass fibers possess higher nonlinear coefficients and excellent MIR transmittances. In this article, the latest developments of the MIR RFLs using fluoride and chalcogenide glass fibers as gain media are introduced, respectively. This review article mainly focuses on the developments of MIR RFLs in aspects of output wavelength, output power, and optical efficiency. Besides, the prospect of MIR RFLs is also discussed.展开更多
文摘通过动态蒸馏提纯技术制备了高纯Ge-As-Se和Ge-As-S硫系玻璃。采用两步棒管法拉制了以Ge-As-Se玻璃为纤芯、Ge-As-S玻璃为包层的小芯径阶跃折射率光纤,并使用飞秒激光抽运光纤测试了超连续谱的产生。以Al和GaCl_3分别作为除氧剂和C/H纯化剂可以有效消除玻璃中的C、H和O杂质。制备的Ge As Se/Ge As S光纤在2~9μm波段表现出优异的传输性能,光纤数值孔径约为1.3;采用重复频率为10.5 MHz、脉冲宽度为320 fs、中心波长为4.0μm、峰值功率为4.6 k W激光抽运长度为22 cm、芯径为6μm的光纤,获得了覆盖1.9~8.2μm、光谱平坦度为±10 d B、平均功率为4.5 m W的超连续谱。
文摘采用熔融淬冷法制备了Ge_(15)Sb_(20)Se_(65)硫系玻璃,并拉制成直径为500μm的裸玻璃光纤,损耗测量结果显示光纤在6μm波长处的最低损耗为1.68dB/m。利用自行搭建的自动光纤拉锥平台拉制了腰锥直径分别为20,100,250μm的拉锥光纤,并对不同浓度的乙醇溶液进行了光谱分析检测实验,最后基于光纤倏逝波理论用COMSOL Multi physics软件仿真了三种不同腰锥直径的锥形光纤对乙醇溶液的传感灵敏特性,与实验结果进行了对比。
文摘采用反复蒸馏提纯技术和开放式动态蒸馏相结合的工艺,制备了高纯As-S玻璃,基本消除了玻璃在2.9、4和6.3μm处的杂质吸收。利用旋转法制备出壁厚均匀、表面质量优异的硫系玻璃套管。采用棒管法拉制出丝径50μm,芯径40μm具有芯包结构的硫系玻璃光纤。拉制的As-S光纤机械性能和光学性能优异,光纤丝径波动小于1%,弯曲半径优于4 mm,中红外波段损耗基线小于0.5 d B/m。制备出像元呈正方形排列,出端规格64×9,入端规格192×3,用于线–面转换的红外传像束,像束断丝率为2.7%。利用该异型传像束成功实现了长线阵的红外推扫成像。
基金Project supported by the National Natural Science Fundation of China(Grant No.11404286)the Natural Science Fundation of Zhejiang Province,China(Grant No.LY15F050010)the Scientific Research Foundation of Zhejiang University of Technology,China(Grant No.1401109012408)
文摘Based on the designed As_2Se_3 and As_2S_3 chalcogenide glass photonic crystal fiber(PCF) and the scalar nonlinear Schrdinger equation,the effects of pump power and wavelength on modulation instability(MI) gain are comprehensively studied in the abnormal dispersion regime of chalcogenide glass PCF.Owing to high Raman effect and high nonlinearity,ultra-broadband MI gain is obtained in chalcogenide glass PCF.By choosing the appropriate pump parameter,the MI gain bandwidth reaches 2738 nm for the As_2Se_3 glass PCF in the abnormal-dispersion region,while it is 1961 nm for the As_2S_3 glass PCF.
基金supported by the Fundamental Research Funds for the Central Universities under Grant No.ZYGX2015KYQD015
文摘As mid-infrared(MIR) lasers show numerous applications in the field of defense, medical, materials processing, and optical communications. Investigation on MIR Raman fiber lasers(RFLs) increasingly becomes a hot topic. Compared with the traditional silica fibers, fluoride and chalcogenide glass fibers possess higher nonlinear coefficients and excellent MIR transmittances. In this article, the latest developments of the MIR RFLs using fluoride and chalcogenide glass fibers as gain media are introduced, respectively. This review article mainly focuses on the developments of MIR RFLs in aspects of output wavelength, output power, and optical efficiency. Besides, the prospect of MIR RFLs is also discussed.
