1 Gansu All Solid-State Laser Engineering Research Center, Tianshui 741001, China; 2 Engineering Research Center of Integrated Circuit Packaging and Testing, Ministry of Education, Tianshui 741001, China; 3 School of Electronic Information and Electrical Engineering, Tianshui Normal University, Tianshui 741001, China; 4 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China; 5 Shanghai Institute of Optics and Fine Mechanis, Chinese Academy of Sciences, Shanghai 201800, China
Abstract We demonstrate a high power, widely tunable femtosecond MgO-doped periodically poled lithium niobate (MgO:PPLN) optical parametric oscillator (OPO) at 151 MHz, pumped by a Kerr-lens mode-locked Yb:KGW laser. With a maximum pump power of 7 W, the OPO is capable of delivering as high as 2.2 W of the signal centered around 1500 nm with tunable signal spectrum ranges of 1377 nm-1730 nm at an extraction efficiency of 31.4%, which exhibits a long-term passive power stability better than 0.71% rms over 4 h. The maximum idler bandwidths of 185 nm at 3613 nm are obtained across the idler tuning ranges of 2539 nm-4191 nm. By compensating intracavity dispersion, the signal has the shortest pulse duration of 170 fs at 1428 nm.
Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 62165012 and 61665010), the Key Research and Development Projects in Gansu Province, China (Grant No. 21YFIGE300), Gansu Province College Industry Support Plan Project (Grant Nos. 2020C-23 and 2022CYZC-59), the Natural Science Foundation of Gansu Province, China (Grant Nos. 21JR7RE173 and 20JR5RA494), Qinzhou District Science and Technology Plan Project (Grant No. 2021-SHFZG-1442), the Scientific Research Innovation Platform Construction Project of Tianshui Normal University, Gansu Province, China (Grant No. PTJ2022-06), and Science and Technology Supporting Program Project of Tianshui City (Grant Nos. 2022-FZJHK-8548, 2019-FZJHK-9891, and 2020-FZJHK-9757).
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