摘要
被动锁模光纤激光器是超快激光家族中的重要成员,凭借光纤的优良特性,如鲁棒性好、结构简单紧凑、稳定可靠等,吸引了相关研究者的广泛关注。近年来,随着光纤制备工艺和锁模技术的不断进步,光纤锁模激光器得到了迅速发展。基于此,描述锁模技术及不同色散区的锁模激光器,并依据锁模机制、脉冲性质等分类叙述,综述了国内外该领域的研究现状和发展趋势,重点阐述全光纤非线性环形放大镜和微纳光纤锁模激光器的研究进展。
Significance Since the invention of the fiber laser is more than half a century ago,the performance index of fiber beam output has continuously improved,which is mainly reflected in the improvement of output pulse power,shortening of output pulse width,improvement of beam quality,and shaping of the laser spectrum.Femtosecond fiber laser,as an important branch of the fiber laser field,has been widely used in the industry,mainly because of its advantages over solid-state femtosecond lasers in the following three aspects.1)All-optical slimming and high optical efficiency.Because of the pump light in the optical fiber waveguide transmission,the effective action distance is longer,which improves the conversion efficiency.Additionally,the fiber has the advantages of soft and easy-tocoil integration,so it can be connected through the welding process.2)Close to the diffraction limit of the beam quality and good heat dissipation.As the signal light is confined to the optical fiber waveguide in the single-mode form,the output from the photonic crystal fiber with a large mode field diameter and chirality coupling optical fiber can help maintain a good speckled pattern.Additionally,the large cooling area of the heating effect of the solid gain medium can help overcome the inherent effect.It is an important way to realize high-power laser.3)The ion emission spectrum in the fiber is wider,so that the fiber laser can achieve the output pulse with a narrower pulse width and a wider spectral width.Thanks to the ultra-short pulse width,ultra-wide spectrum,and ultra-high peak power of the fiber laser,it has wide application prospects in industrial processing,communication detection,biological medicine,high-energy physics,material preparation,and chemistry,and other fields.High energy,narrow pulse width,high stability of ultra-short pulses are also being researched throughout the optical fiber mode-locked oscillator development.Therefore,new principles,new technologies,and a variety of new laser materials have been revealed at histo
作者
张海涛
邓德才
李宇航
祖嘉琦
陈俊宇
巩马理
柳强
Zhang Haitao;Deng Decai;Li Yuhang;Zu Jiaqi;Chen Junyu;Gong Mali;Liu Qiang(Key Laboratory of Photonic Control Technology,Ministry of Education,Center for Photonics and Electronics,Department of Precision Instrument,Tsinghua University,Beijing 100084,China)
出处
《中国激光》
EI
CAS
CSCD
北大核心
2021年第15期106-121,共16页
Chinese Journal of Lasers
基金
国家自然科学基金(61475081)。
关键词
激光技术
光纤锁模激光器
非线性环形放大镜
微纳光纤
耗散孤子
脉动孤子
laser technique
mode-locked fiber laser
nonlinear amplified loop mirror
micro-nano fiber
dissipative soliton
pulsating soliton
