《Tab.1 Yb3+doped laser materials classified by molecular structure表1按分子结构分类的Yb3+掺杂激光材料》

  提示：宽带有限、当前游客访问压缩模式

本系列图表出处文件名：随高清版一同展现

《基于SESAM被动调Q的激光二极管泵浦Yb∶CaYAlO_4脉冲激光器》

1. 获取 高清版本忘记账户？点击这里登录

1. 下载图表忘记账户？点击这里登录

Existing research shows that Yb3+ion dopedlaser materials have the advantages of having a simple energy level structure，high quantum efficiency，wide emission spectrum，being unaffected by excited stateabsorption，up-conversion，concentration quenching，etc….These are each very suitable for generating high power，near-infrared short-pulse laser beams[28-29].Meanwhile，since a doped Yb3+laser medium has an absorption wavelength matching the emission wavelength of its high-intensity InGaAs laser diode，a compact laser-diode-pumped all-solidstate laser can be constructed.Doped Yb3+laser materials can be classified into glass，crystal，and ceramic，depending on the used process of preparation.They can also be classified by molecular structure，as shown in Tab.1.In recent years，as a new type of erbium-doped gain material，Yb∶CaYAlO4has been attracting the attention of academics and industrial professionals，its output characteristics in continuous lasers and mode-locked pulsed lasers has been studied with more frequency.In 2010，Dongzhen Li et al.used the Czochralski method to grow Yb∶CaYAlO4crystals then determined their lifetime of fluorescence to be 426μs and the full width at half maximum of their fluorescence spectrum to be at61 nm[30].In 2011，they further studied the continuous laser output of Yb∶CaYAlO4crystals.When the incident pump's power is set to 8 W，a continuous laser with a maximum output power of 2.48 W is achieved with a slope efficiency of 55.4%[31].Also in 2011，Tan et al.of Nanyang Technological University achieved a pulsed laser with a pulse width of156 fs，repetition rate of 91 MHz and a maximum average output power of 740 m W[32]using a SESAM mode-locked Yb∶CaYAlO4laser.In 2015，Gao et al.achieved Kerr lens mode-locking with Yb∶CaYAlO4and produced an ultrashort pulse laser of 33 fs with a repetition rate of 115 MHz[33].In 2016，Ma et al.of Nanyang Technological University used graphene as a saturable absorber to achieve mode-locking pulse output with a Yb∶CaYAlO4laser achieving a pulsed width of 30 fs，which is the shortest pulse generated by mode-locked Yb∶CaYAlO4lasers so far[34].It is worth noting that，while current research on Yb∶CaYAlO4pulsed lasers is related to mode-locked lasers with no report on passive Q-switched lasers，understanding the performance of Q-switched pulses from Yb∶CaYAlO4crystal lasers helps further understand the optical properties of Yb∶CaYAlO4crystals.Therefore，it is necessary to research and explore the performance of passive Q-switched Yb∶CaYAlO4crystal lasers.