会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 33. 发明申请
    • THULIUM LASER
    • THULIUM激光
    • WO2015057285A2
    • 2015-04-23
    • PCT/US2014/047025
    • 2014-07-17
    • MASSACHUSETTS INSTITUTE OF TECHNOLOGYFAN, Tso Yee
    • FAN, Tso Yee
    • H01S3/09
    • H01S3/1616H01S3/0407H01S3/042H01S3/092H01S3/09403H01S3/09415H01S3/11H01S3/1643H01S3/1696H01S3/1698
    • Stimulating emission via thulium's lasing transition from the 3 H 4 manifold to the 3 H 6 manifold yields light at wavelength of about 820 nm. Unfortunately, excited thulium ions also transition from the 3 H 4 manifold to the long-lived 3 F 4 manifold, where they become trapped and can no longer participate in the lasing transition. If the enough of the thulium population becomes trapped in the 3 F 4 manifold, the gain medium becomes transparent at the pump wavelength, rendering population inversion difficult or impossible. Fortunately, the size of the population in the 3 F 4 manifold can be limited by selecting an appropriate crystal host and thulium doping concentration, pumping the thulium with pulses shorter than the 3 F 4 manifold's lifetime, cooling the gain medium to low temperature (e.g., 77 K), stimulating emission from the 3 F 4 manifold, upconversion pumping of the thulium from the 3 F 4 manifold to the 3 H 4 manifold, or transferring energy from thulium in the 3 F 4 manifold to a co-dopant.
    • 通过从3H4歧管到3H6歧管的ium激光跃迁刺激发射产生约820nm波长的光。 不幸的是,激发的ium离子也从3H4歧管转变为长寿命的3F4歧管,在那里它们被困住,不能再参与激光转换。 如果足够的ium群被捕获在3F4歧管中,则增益介质在泵浦波长处变得透明,使得群体反转困难或不可能。 幸运的是,通过选择适当的晶体主体和ium子掺杂浓度可以限制3F4歧管中的群体的大小,用比3F4歧管寿命短的脉冲泵送th,,将增益介质冷却到低温(例如77K) ,刺激来自3F4歧管的发射,从3F4歧管向3H4歧管向上转换汲取铯,或将能量从3F4歧管中的or传递到共掺杂剂。