具有高损伤阈值和非线性阈值以及良好散热能力的大模场光子晶体光纤(PCF)一直是国内外研究的重点。中国科学院上海光学精密机械研究所在国际上首次提出了稀土离子掺杂的软玻璃全固态光纤概念。该方案利用低折射率的玻璃取代了空气孔,避免了空气孔的存在带来的缺陷,使得全光纤激光器成为可能,同时软玻璃的使用也显著地提高了光纤的泵浦吸收率和非线性阈值。上海光机所利用自行制备的6%(质量分数)镱掺杂的高质 Large mode field photonic crystal fiber (PCF) with high damage threshold and nonlinear threshold and good heat dissipation capability has always been the focus of research at home and abroad. Shanghai Institute of Optics and Fine Mechanics, Academia Sinica, for the first time in the world put forward the concept of all-solid-state optical fiber doped with rare earth ions. This solution replaces the air holes with low refractive index glass, avoids the defects caused by the presence of air holes and makes the all-fiber laser possible, and the use of soft glass also significantly improves the pump absorption rate and nonlinearity Threshold. Shanghai Optical used by its own preparation of 6% (mass fraction) Ytterbium doped high quality