Xu Haowen, Zhang Chunxiang, Fan Dianyuan, Ma Chunyang, Tang Pinghua, Liu Jun
Opt Lett. 2024 Nov 1;49(21):6121-6124. doi: 10.1364/OL.537261.
Cylindrical vector beams (CVBs), characterized by their spatially non-uniform but rotationally symmetric polarization distributions, have garnered considerable attention due to their unique properties. In this Letter, we demonstrate the generation of cylindrical vector beams directly from a Yb-doped Mamyshev oscillator (MO). Both the radially and azimuthally polarized vector beams are achieved with a pulse duration of 3.6 ps and a pulse energy of 8.2 nJ at the repetition rate of 15.25 MHz. We also find that the filtered linearly polarized beam from the output CVBs can be homogeneously dechirped to 114 fs using the external grating pairs, indicating the potential intracavity pulse compression capability for the output CVBs. Simultaneously, ultrafast scalar Gaussian beams can also be obtained from another arm. These results can give insights into the experimental design and realization of high-energy and high-power structured (CVB or vortex) ultrashort lasers.
圆柱矢量光束（CVBs），其特征在于空间上非均匀但旋转对称的偏振分布，因其独特的性质而备受关注。在本信函中，我们展示了直接从掺镱马梅舍夫振荡器（MO）产生圆柱矢量光束。径向和方位角偏振矢量光束均可实现，脉冲持续时间为3.6皮秒，脉冲能量为8.2纳焦，重复频率为15.25兆赫兹。我们还发现，利用外部光栅对，从输出的圆柱矢量光束中滤波得到的线偏振光束可以均匀地啁啾至114飞秒，这表明输出的圆柱矢量光束具有潜在的腔内脉冲压缩能力。同时，超快标量高斯光束也可以从另一臂获得。这些结果可为高能量和高功率结构化（圆柱矢量光束或涡旋）超短激光器的实验设计和实现提供见解。
