Zhao Jun, Fan Jintao, Tian Haochen, Hu Minglie
Opt Lett. 2020 Jul 15;45(14):3985-3988. doi: 10.1364/OL.397032.
We demonstrate a tunable femtosecond dual-beam-mode (cylindrical vector beam [CVB] and Gaussian beam [GB]), dual-signal-wavelength optical parametric oscillator based on a temperature-tuned lithium triborate crystal, synchronously pumped by a frequency-doubled mode-locked Yb-doped fiber laser. When fixing the CVB wavelength at 780 nm, the central wavelength of the GB signal could be continuously tuned from 664 to 722 nm. The maximum total signal output power is 515 mW at a 4 W pump with dual-wavelength operation (664 and 780 nm). All the measured signal pulse durations are around 150 fs. Moreover, sum-frequency-generation with Gaussian mode tuning from 548 to 588 nm is obtained, with the maximum power of 52 mW at 548 nm. Thanks to the dual-channel configuration, the wavelengths of a CVB and GB can be tuned independently. Such a flexible and versatile configuration makes it a practical tool for many applications such as high-resolution microscopy and high-capacity optical communication.
我们展示了一种基于温度调谐的硼酸锂晶体的可调谐飞秒双光束模式（圆柱矢量光束[CVB]和高斯光束[GB]）、双信号波长光学参量振荡器，由倍频锁模掺镱光纤激光器同步泵浦。当将CVB波长固定在780 nm时，GB信号的中心波长可在664至722 nm范围内连续调谐。在4 W泵浦且双波长运行（664和780 nm）时，最大总信号输出功率为515 mW。所有测量的信号脉冲持续时间约为150 fs。此外，实现了高斯模式从548至588 nm调谐的和频产生，在548 nm处最大功率为52 mW。得益于双通道配置，CVB和GB的波长可独立调谐。这种灵活通用的配置使其成为高分辨率显微镜和高容量光通信等许多应用的实用工具。
