同带泵浦的Tm:CYA调Q锁模激光器
Tm:CYA Q-switched mode-locked laser realized by tandem-pumping
摘要
Abstract
Passively Q-switched mode-locked operation was realized for the first time by inserting a semicon-ductor saturable absorption mirror(SESAM)as a mode-locking element into a Tm:CaYALO4(Tm:CYA)laser using tandem-pumping technology.The laser cavity adopted an X-type four-mirror cavity structure,and the pumping source was an Er:Y3Al5O12(Er:YAG)solid-state laser with a central wavelength of 1650 nm.Output coupling mirrors with transmittances of 0.5%,1.5%,3%,and 5% were used to study the laser's con-tinuous wave(CW)output and mode-locking output characteristics.The experimental results show that the laser has the best output characteristics when an output coupling mirror with a transmittance of 5% is used.The maximum power of 894 mW and the maximum slope efficiency of 16% were obtained when the laser operated in the CW regime.After the CW power was optimized to the highest,the mode-locked element SESAM was added to the optical path.When the absorbed pump power became greater than 1.86 W,the laser operation entered an unstable Q-switched state;when the absorbed pump power increased to 5.7 W,a stable passively Q-switched mode-locked operation was achieved;when the absorbed pump power reached 6.99 W,a mode-locked pulse laser with a maximum output power of 399 mW was obtained by using the out-put coupling mirror with transmittance of 5% .At that time,the repetition frequency under the Q-switched en-velope was 98.11 MHz,the pulse width was 619.4 ps,and the corresponding maximum single pulse energy was 4.07 nJ.The mode-locked pulse modulation depth in a Q-switched envelope was observed to be close to 100% .The above results show that tandem-pumping technology can be used in lasers to generate Q-switched mode-locked pulses,which provides a new pumping method for generating ultrashort pulse lasers.关键词
Tm:CYA激光器/同带泵浦/半导体可饱和吸收镜(SESAM)/调Q锁模Key words
Tm:CYA laser/tandem-pumping/semiconductor saturable absorption mirror(SESAM)/Q-switched mode-locked分类
信息技术与安全科学引用本文复制引用
孙堂正,张明霞,朱永乐,董忠,令维军,李云飞,谭晶荣,杜晓娟,丁嘉宇,任舒婷,许浩,王翀,杨金芳..同带泵浦的Tm:CYA调Q锁模激光器[J].中国光学（中英文）,2024,17(4):764-770,7.基金项目
国家自然科学基金(No.62165012) （No.62165012）
甘肃省重点研发计划(No.21YFIGE300) （No.21YFIGE300）
甘肃省高等学校产业支撑引导项目(No.2020C-23) （No.2020C-23）
甘肃省教育厅:教育揭榜挂帅项目(No.2021jyjbgs-06) （No.2021jyjbgs-06）
甘肃省高等学校创新基金项目(No.2021B-190) （No.2021B-190）
秦州区科技计划(No.2021-SHFZG-1442) （No.2021-SHFZG-1442）
2023年甘肃省高校青年博士支持项目(No.2023QB-013) （No.2023QB-013）
天水师范学院 2022 年科研创新平台建设专项(No.PTJ2022-06) （No.PTJ2022-06）
天水师范学院研究生创新引导项目(No.TYCX2235) （No.TYCX2235）
甘肃省优秀研究生创新之星项目(No.2022CXZX-796,No.2023CXZX-792)Supported by National Natural Science Foundation of China(No.62165012) （No.2022CXZX-796,No.2023CXZX-792）
Key R&D Program of Gansu Province(No.21YFIGE300) （No.21YFIGE300）
Gansu Provincial Higher Education Industry Support and Guidance Project(No.2020C-23) （No.2020C-23）
Gansu Provincial Department of Education:Education Unveiling and Leading Project(No.2021jyjbgs-06) （No.2021jyjbgs-06）
Gansu Provincial Higher Education Innovation Fund Project(No.2021B-190) （No.2021B-190）
Qinzhou Dis-trict Science and Technology Plan(No.2021-SHFZG-1442) （No.2021-SHFZG-1442）
2023 Gansu Provincial University Young Doctor-al Support Project(No.2023QB-013) （No.2023QB-013）
Tianshui Normal University 2022 special project for the construction of scientific research and innovation platform(No.PTJ2022-06) （No.PTJ2022-06）
Tianshui Normal University Graduate Innova-tion Guidance Project(No.TYCX2235) （No.TYCX2235）
Gansu Province Outstanding Graduate Innovation Star Program(No.2022CXZX-796,No.2023CXZX-792) （No.2022CXZX-796,No.2023CXZX-792）
