【摘要】 Ｆ~＋＿２型心具有跃迁偶极矩大、Ｓｔｏｋｅｓ位移适当、效率高、调谐范围覆盖０．８～４．０μｍ近红外区等优点，是一种具有实际应用价值的色心激光工作心。它的能级结构可用Ｈ~＋＿２模型加以描述。利用与激光运转相关的ｌｓσ＿ｇ：、２ｐσ＿ｕ，、２ｐπ＿ｕ能级的正常态和弛豫态特征可以阐述Ｆ~＋＿２型心的激光四能级系统和辅助光的作用。多数Ｆ~＋＿２型色心激光器的稳定运转需要有辅助光的激励。辅助光产生的重取向可以抵消泵光产生的重取向，以达到实现稳定、高效的激光运转的目的。更多还原

【Abstract】 Like F￣+₂ color center,F￣+₂ -type center has a strong dipole moment,3 sufficient Stokes shift to allow low self-absorption,yet high efficiency,and broad tunable emission ranges in 0.8-4.0 μm NIR,and made it a potentially useful laser medium,The energy level diagram of F￣+₂-type center shows an excellent agreement with H￣+₂model.Based on the normal and relaxed states of lsσ_g,2pσ_u,2pπ_u,authors summarize the four-level system of F￣+₂-type center and analyze the effect of auxiliary light.Many F￣+₂-type color-center lasers require an auxiliary light for stable and efficient operation. This auxiliary light is used to compensate the reorientation induced by intense optical pumping.更多还原