High-Power All-Polarization-Maintaining Fiber Femtosecond Pulse Laser at 780 nm and Its Engineering Integration(Invited)  

作　　者：Luo Tao Wen Junpeng Wang Wenlong Li Zihan Zhu Zhe Yang Jiahao Wu Yin Xiu Hao Fan Yiheng Liu Yalong Wei Xiaoming Yang Zhongmin 

机构地区：[1]School of Physics and Optoelectronics,State Key Laboratory of Luminescent Materials and Devices,Guangdong Engineering Technology Research and Development Center of Special Optical Fiber Materials and Device,Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques,South China University of Technology,Guangzhou 510640,Guangdong,China [2]Guangzhou Yangming Laser Technology Co.,Ltd.,Guangzhou 510663,Guangdong,China [3]Research Institute of Future Technology,South China Normal University,Guangzhou 510006,Guangdong,China

出　　处：《中国激光》2024年第19期207-214,共8页Chinese Journal of Lasers

基　　金：国家自然科学基金(62375087,12374304);国家重大科研仪器研制项目(61927816);广东省重点领域研发计划(2023B0909010002,2021B1515020074);中德交流项目(M-0296);广东省“珠江人才计划”引进创新创业团队项目(2021ZT09Z109)。

摘　　要：We present a high-power, high-stability all-polarization-maintaining(all-PM) fiber femtosecond pulse laser source at 780 nm with full engineering integration that comprises an all-PM fiber amplified chirped pulse laser at 1560 nm, a grating pair compressor and a second-harmonic generation(SHG) module. The all-PM fiber amplified chirped pulse laser at 1560 nm operates with a repetition rate of 111.5 MHz and an average power of 5.37 W, which is compressed with a pulse width of about 204 fs. The 780-nm pulses are subsequently generated by SHG in a frequency-doubling crystal. We achieve an average power of 2.22 W at 780 nm with a pulse width of 288 fs, a SHG efficiency of 52%, and a root-mean-square power fluctuation of 0.23%, which is the best performance merit as far as we know. The whole laser system is finally integrated for practical applications with reliable laser operation. We anticipate that this 780-nm all-PM fiber femtosecond pulse laser with full engineering integration is promising for frontier applications such as two-photon imaging, nanofabrication, terahertz generation, etc.

关 键 词：LASERS femtosecond pulse high power fiber laser second-harmonic generation 

分 类 号：O437[机械工程—光学工程]