1μm/1.5μm基于非互易性相移器的高重频飞秒光纤激光器  

1μm/1.5μm high-repetition-rate femtosecond fiber laser based on nonreciprocal phase shifter

作　　者：刘扬眉 侯月彰 罗婷 周渊珠 孙钰淇 李志莉 王天枢 潘新建[3,4] Liu Yangmei;Hou Yuezhang;Luo Ting;Zhou Yuanzhu;Sun Yuqi;Li Zhili;Wang Tianshu;Pan Xinjian(Institute of Optoelectronic Engineering,Changchun University of Science and Technology,Changchun 130022,China;Zhongshan Research Institute,Changchun University of Science and Technology,Zhongshan 528437,China;Guangdong Huakuai Photonics Technology Co.,Ltd.,Zhongshan 528400,China;Zhongshan College,University of Electronic Science and Technology of China,Zhongshan 528402,China)

机构地区：[1]长春理工大学光电工程学院,吉林长春130022 [2]长春理工大学中山研究院,广东中山528437 [3]广东华快光子科技有限公司,广东中山528400 [4]电子科技大学中山学院,广东中山528402

出　　处：《红外与激光工程》2024年第5期26-34,共9页Infrared and Laser Engineering

基　　金：国家自然科学基金项目(62241502,62005041);广东省自然科学基金项目(2018A030310662);广东省教育厅重点领域专项项目(2022ZDZX1042,2023ZDZX3040);吉林省科技发展计划项目(20220508134RC)。

摘　　要：高重频的飞秒脉冲激光器在工业加工、医疗、精密测量等各个领域都有着重要应用。为了分析“9”字腔锁模激光器的自启动性能,利用琼斯矩阵建立了非线性放大环形镜的传输函数,分析了环形镜中不同波片角度对腔内往返传输函数的影响。搭建了基于非线性放大环形镜的光纤激光器,分别使用了掺镱光纤、掺铒光纤作为增益介质,在1μm和1.5μm波段分别实现了重复频率为600 MHz和280 MHz的基频锁模。所设计的激光器具有脉宽窄、光谱宽、稳定性好、自启动成功率高的特点,激光器完成了集成化封装,能够满足微纳加工、激光医疗、光频率梳等领域对飞秒激光的应用需求。Objective Ultrafast mode-locked fiber lasers have gained increasing popularity in various fields due to their narrow pulse width,broad spectrum,and high peak power.In the field of laser medicine,for instance,ultrafast lasers have emerged as a novel treatment method for combating cancer and treating stones.The integration of ultrafast lasers and time-frequency technology in the field of optical frequency comb measurement has yielded remarkable advances,such as the development of optical atomic clocks,microwave photonics,and other emerging technologies.Furthermore,the optical frequency comb has the potential to be implemented in space missions.Ultrafast mode-locked fiber lasers are being used more and more widely and have high application value.Mode-locked technology is the main way to generate ultra-short pulses.Currently,among the main modelocked methods,mode-locked laser based on the nonlinear amplifying loop mirror has the characteristics of fast response time,high damage threshold,high environmental stability,low phase noise and short output pulse,which is considered to be the most promising ultrafast laser for large-scale application.Unfortunately,this kind of laser often requires external disturbance or high pump energy when it is started,which greatly reduces the reliability of the laser and increases the application cost.In order to improve the reliability of mode-locked laser in practical applications,femtosecond fiber lasers based on Jones matrix are reported.Methods In this paper,a mode-locked laser based on a non-reciprocal phase shift for a nonlinear amplifying loop mirror is set up(Fig.1).The non-reciprocal phase shifter consists of a Faraday rotator,a half waveplate,aλ/8 waveplate,and a mirror.By rotating the angle of the waveplates,the laser takes into account the characteristics of self-starting and wide spectrum,and the gratings are inserted into the cavity to balance the positive dispersion and outside of the cavity to compress pulses.The transfer function of nonlinear amplification loop mirror

关 键 词：飞秒脉冲激光 宽光谱 高重频 非互易性相移器 

分 类 号：TN248[电子电信—物理电子学]