基于NPR效应及NOLM的多波长SOA光纤激光器  

Multi-wavelength SOA fiber laser based on NPR effect and NOLM

作　　者：郝红甜 周雪芳[1] 崔文翔 胡淼[1] 王天枢[2] HAO Hong-tian;ZHOU Xue-fang;CUI Wen-xiang;HU Miao;WANG Tian-shu(School of Communication Engineering,Hangzhou Dianzi University,Hang′zhou 310018,China;National and Local Joint Engineering Research Center of Space Optoelectronics Technology,Changchun University of Science and Technology,Changchun 130022,China)

机构地区：[1]杭州电子科技大学通信工程学院,杭州310018 [2]长春理工大学空间光电技术国家有地方联合工程研究中心,长春130022

出　　处：《光电子．激光》2020年第10期1007-1012,共6页Journal of Optoelectronics·Laser

基　　金：浙江省科技计划公益项目(LGG19F050001)资助;国家自然科学基金项目(601705055)资助项目。

摘　　要：为了获得具有超窄波长间隔的稳定多波长输出,设计并实验验证了一种基于非线性偏振旋转(NPR)效应及NOLM的多波长SOA光纤激光器。利用SOA的NPR效应,将SOA与其他偏振器件组合引起强度相关损耗(IDL)效应,从而抑制SOA均匀加宽线宽内的模式竞争,实现稳定的多波长输出。Lyot-sagnac滤波器作为波长选择器件,选用71 m长保偏光纤(PMF)得到超窄波长间隔。另外NOLM作为功率均衡器进一步抑制了模式竞争效应并且实现了功率均衡,提高了边模抑制比(SMSR)。通过调节偏振控制器(PCs),最终在室温下实现了稳定且功率均衡的多波长输出,10 dB带宽内输出的波长数量为184,波长间隔为0.08 nm,SMSR高达22 dB。该激光器可作为DWDM光通信系统中的光源。In order to obtain stable multi-wavelength lasing output lines with ultra-narrow wavelength spacing,a multi-wavelength semiconductor optical amplifier(SOA)fiber laser based on nonlinear polarization rotation(NPR)effect and nonlinear optical loop mirror(NOLM)is designed and experimentally demonstrated.Due to the NPR effect of SOA,the intensity-dependent loss(IDL)is induced by the combination consisting of SOA and polarization devices to suppress mode competition effect within homogenous broadening linewidth of SOA for achieving stable multiwavelength output.The Lyot-sagnac filter is designed to serves as a wavelength selection device,which composes of a section of 71 m long polarization-maintaining fiber(PMF)for ultra-narrow wavelength spacing.In addition,the NOLM in the fiber laser serves as the intensity equalizer to suppress mode competition effect furtherly and it also achieves power equalization and improve side mode suppression ratio(SMSR).By carefully adjusting the angels of polarization controllers(PCs),stable multiwavelength lasing lines with power equalization has been achieved at room temperature.The number of lasing lines is up to 184 with wavelength spacing of 0.08 nm within 10 dB bandwidth.The SMSR is about up to 22 dB.The designed fiber laser can be used as a light source in dense wavelength division multiplexing(DWDM)optical communication system.

关 键 词：多波长光纤激光器 NPR效应 Lyot-sagnac滤波器 NOLM 

分 类 号：TN253[电子电信—物理电子学]