一种大模场沟槽辅助型扇形瓣状光纤的研究
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摘要
设计了一种抗弯曲大模场面积单模光纤方案——沟槽辅助型瓣状光纤。纤芯中间加入了低折射率辅助沟槽,纤芯四周围绕高折射率扇形瓣。利用COMSOL软件计算模式损耗、模场面积等性能。研究表明:在弯曲半径为15cm的情况下,光纤模场面积可达700μm2,高阶模和基模损耗比大于100,能够实现有效单模操作。此外,当弯曲方向在[-180°,180°]范围内变化时,光纤性能保持稳定。这种光纤在紧凑型高功率光纤激光器和放大器领域显示出巨大的潜力。
This study proposes a novel large mode area fiber structure with bend-resistant and single-mode operation,known as trench-assisted segmented cladding fiber.In this structure,a low refractive index(RI)trench is added to the fiber core and the core is surrounded periodically with high RI fan-segmented claddings.COMSOL software is used to calculate the mode leakage loss and mode area.Numerical analysis indicates that when the indicates bending radius of the fiber is 15 cm,the mode field area of the fiber can achieve 700μm2.Meanwhile,the loss ratio between the high-order mode(HOM)and fundamental mode(FM)is >100,which ensures effective single-mode operation.In addition,the fiber performance is stable within the bending orientation from-180°to180°.Based on the results of this study,the proposed fiber has the potential to play an important role in developing high-power fiber lasers and amplifiers.
This study proposes a novel large mode area fiber structure with bend-resistant and single-mode operation,known as trench-assisted segmented cladding fiber.In this structure,a low refractive index(RI)trench is added to the fiber core and the core is surrounded periodically with high RI fan-segmented claddings.COMSOL software is used to calculate the mode leakage loss and mode area.Numerical analysis indicates that when the indicates bending radius of the fiber is 15 cm,the mode field area of the fiber can achieve 700μm2.Meanwhile,the loss ratio between the high-order mode(HOM)and fundamental mode(FM)is >100,which ensures effective single-mode operation.In addition,the fiber performance is stable within the bending orientation from-180°to180°.Based on the results of this study,the proposed fiber has the potential to play an important role in developing high-power fiber lasers and amplifiers.
引文
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[18]Ma S S,Ning T G,Pei L,et al.Bend-resistant large mode area fiber with novel segmented cladding[J].Optics&Laser Technology,2018,98:113-120.
[19]Cheng G X.The basic of light-wave technology[M].Beijing:Chinese Railway Press,2000:239-243.陈根祥.光波技术基础[M].北京:中国铁道出版社,2000:239-243.
[20]Song N,Yin Z M,Ge W P.Theoretical calculation of the propagation characters of optical fibers[J].Acta Photonica Sinica,2002,31(5):566-569.宋宁,殷宗敏,葛文萍.光纤传输特性的理论计算[J].光子学报,2002,31(5):566-569.
[21]Jiang H,Zhang J.Analysis on bending loss of singlemode fiber[J].Communications Technology,2010,43(4):67-69.江华,张静.单模光纤的弯曲损耗分析[J].通信技术,2010,43(4):67-69.
[2]Fang Z H,Hui X F.The development of Yb-doped double-clad fiber laser and its application[J].Laser Technology,2006,30(4):438-444.
[3]Zhang D P,Hu M L,Xie C,et al.A high power photonic crystal fiber laser oscillator based on nonlinear polarization rotation mode-locking[J].Acta Physica Sinica,2012,61(4):044206.张大鹏,胡明列,谢辰,等.基于非线性偏振旋转锁模的高功率光子晶体光纤飞秒激光振荡器[J].物理学报,2012,61(4):044206.
[4]Jeong Y,Sahu J K,Payne D N,et al.Ytterbiumdoped large-core fiber laser with 1kW of continuouswave output power[J].Electronics Letters,2004,40(8):470-471.
[5]Jeong Y,Sahu J K,Payne D N,et al.Ytterbiumdoped large-core fiber laser with 1.36 kW of continuous-wave output power[J].Optics Express,2004,12(25):6088-6092.
[6]Li W,Wu Z C,Chen X,et al.High power fiber laser output power breakthrough 1 kW[J].High Power Laser and Particle Beams,2006,18(6):890.李伟,武子淳,陈曦,等.大功率光纤激光器输出功率突破1kW[J].强激光与粒子束,2006,18(6):890.
[7]Sun Y H,Ke W W,Feng Y J,et al.1030 nm kilowatt-level ytterbium-doped narrow linewidth fiber amplifier[J].Chinese Journal of Lasers,2016,43(6):0601003.孙殷宏,柯伟伟,冯昱骏,等.1030nm千瓦级掺镱光纤窄线宽激光放大器[J].中国激光,2016,43(6):0601003.
[8]Chen D R,Yang T J,Wu J J,et al.Band-rejection fiber filter and fiber sensor based on a Bragg fiber of transversal resonant structure[J].Optics Express,2008,16(21):16489-16495.
[9]Horikis T P,Kath W L.Modal analysis of circular Bragg fibers with arbitrary index profiles[J].Optics Letters,2006,31(23):3417-3419.
[10]Liu M N,Li M X,Jiang C Y,et al.Research progress on high birefringence terahertz photonic crystal fibers[J].Laser&Optoelectronics Progress,2017,54(9):090006.刘梦楠,李梦雪,姜澄溢,等.高双折射太赫兹光子晶体光纤的研究进展[J].激光与光电子学进展,2017,54(9):090006.
[11]Zhang F,Zhang H K,Chen T,et al.Nd-doped double-clad large-mode-area polarization-maintaining photonic crystal fiber laser[J].Chinese Journal of Lasers,2017,44(2):0201020.张峰,张海鹍,陈涛,等.掺钕双包层大模场保偏光子晶体光纤激光器[J].中国激光,2017,44(2):0201020.
[12]Duan J,Teng C,Han K,et al.Fabrication of segmented cladding fiber by bicomponent spinning[J].Polymer Engineering&Science,2009,49(9):1865-1870.
[13]Takenaga K,Arakawa Y,Sasaki Y,et al.A large effective area multi-core fiber with an optimized cladding thickness[J].Optics Express,2011,19(26):B543-B550.
[14]Rastogi V,Chiang K S.Propagation characteristics of a segmented cladding fiber[J].Optics Letters,2001,26(8):491-493.
[15]Ma S S,Ning T G,Li J,et al.Detailed study of bending effects in large mode area segmented cladding fibers[J].Applied Optics,2016,55(35):9954-9960.
[16]Hooda B,Pal A,Rastogi V,et al.Segmented cladding fiber fabricated in silica-based glass[J].Optical Engineering,2015,54(7):075103.
[17]Yeung A,Chu P L,Gang D P,et al.Design and fabrication of polymer cross fiber for large-core single-mode operation[J].Journal of Lightwave Technology,2009,27(2):101-107.
[18]Ma S S,Ning T G,Pei L,et al.Bend-resistant large mode area fiber with novel segmented cladding[J].Optics&Laser Technology,2018,98:113-120.
[19]Cheng G X.The basic of light-wave technology[M].Beijing:Chinese Railway Press,2000:239-243.陈根祥.光波技术基础[M].北京:中国铁道出版社,2000:239-243.
[20]Song N,Yin Z M,Ge W P.Theoretical calculation of the propagation characters of optical fibers[J].Acta Photonica Sinica,2002,31(5):566-569.宋宁,殷宗敏,葛文萍.光纤传输特性的理论计算[J].光子学报,2002,31(5):566-569.
[21]Jiang H,Zhang J.Analysis on bending loss of singlemode fiber[J].Communications Technology,2010,43(4):67-69.江华,张静.单模光纤的弯曲损耗分析[J].通信技术,2010,43(4):67-69.