熔锥光纤倏逝场作用石墨烯双波长锁模掺镱光纤激光器  

Dual-Wavelength Mode-Locked Yb-Doped Fiber Laser Based on the Interaction of Graphene and Fiber-Taper Evanescent Field

作　　者：张成[1] 罗正钱[1] 王金章[1] 周敏[1] 许惠英[1] 蔡志平[1] 

机构地区：[1]厦门大学电子工程系,福建厦门361005

出　　处：《中国激光》2012年第6期25-29,共5页Chinese Journal of Lasers

基　　金：福建省自然科学基金(2011J01370);厦门市科技计划(3502Z20113004)资助课题

摘　　要：报道了利用熔锥光纤石墨烯饱和吸收体实现1μm波段的双波长锁模掺镱光纤激光器(YDFL)。利用光学诱导沉积法,将水溶液中的石墨烯纳米复合物在光倏逝场的作用下沉积至熔锥光纤的锥腰部位。该石墨烯熔锥光纤器件作为可饱和吸收锁模部件具有制作灵活、全光纤结构以及高损伤阈值等优点。基于该器件的可饱和吸收及腔内双折射滤波特性,通过调节偏振控制器优化激光腔内偏振特性,实现了稳定的YDFL双波长锁模。该激光器的两个锁模波长分别为1034.77nm和1038.85nm,二次谐波锁模重复频率为1.09MHz,腔内单脉冲能量最大可达35nJ。A dual-wavelength passively mode-locked Yb-doped fiber laser（YDFL） based on the interaction of graphene and fiber-taper evanescent field is reported.Using optical evanescent-light deposition technique,graphene-polymer nanocomposites in aqueous suspension are coated onto taper waist region.The graphene-based tapered-fiber as a saturable absorber has the advantages of flexibility,all-fiber configuration,and high optical damage threshold.Based on the saturable absorption of this graphene-based component and the cavity-birefringent filtering characteristics,the stable dual-wavelength mode-locked operation is obtained,by properly adjusting the polarization state of the laser cavity.The two mode-locked wavelengths of YDFL are 1034.77 nm and 1038.85 nm,and the mode-locked repetition rate is 1.09 MHz at the second harmonic frequency,and the intracavity pulse energy can reach 35 nJ.

关 键 词：激光器 光纤激光器 石墨烯 熔锥光纤 倏逝场 被动锁模 

分 类 号：TN248.1[电子电信—物理电子学]