Goel Charu, Li Huizi, Zang Jichao, Yoo Seongwoo
Opt Lett. 2022 Aug 1;47(15):3712-3715. doi: 10.1364/OL.465662.
We report a linearly polarized ytterbium-doped fiber (YDF) laser cavity configured by integrating an antiresonant hollow-core fiber-based inline polarizer. The 5-cm-long compact fiber polarizer was fusion spliced to a commercial large-mode-area, polarization-maintaining YDF. Near-diffraction-limited linearly polarized signal output with a polarization extinction ratio of > 21 dB was achieved for up to 25 W of power that was limited only by the available pump power. The performance of the hollow-core fiber polarizer was found to be temperature insensitive, which obviates the need for the precise temperature control required in all-fiber, high-power polarized laser cavities employing crossed fiber Bragg gratings. We used the tapering technique to scale down the geometry of the polarizing fiber and shift its operating wavelength by ∼100 nm, which makes it an attractive candidate for a variety of fiber laser applications.
我们报道了一种线性偏振掺镱光纤（YDF）激光器腔，它通过集成一个基于反谐振空心光纤的在线偏振器来配置。将5厘米长的紧凑型光纤偏振器熔接至商用大模场面积保偏YDF。对于高达25瓦的功率，实现了近衍射极限的线性偏振信号输出，偏振消光比大于21分贝，该功率仅受可用泵浦功率限制。发现空心光纤偏振器的性能对温度不敏感，这消除了采用交叉光纤布拉格光栅的全光纤高功率偏振激光腔所需的精确温度控制。我们使用了锥形技术来缩小偏振光纤的尺寸，并将其工作波长偏移约100纳米，这使其成为各种光纤激光应用的有吸引力的候选者。
