CAJ | 학술논문

掺钕钒酸钇作为一种重要的激光增益介质,以其受激发射截面大、对809 nm波长存在很强的宽吸收带、偏振发射等优点,在LD端面泵浦全固态激光器中得到了广泛的应用,其中比较有应用价值的受激发射谱线为1 064 nm,1 342 nm和914 nm.由于914 nm谱线属准三能级结构,以及钒酸钇晶体较低的热导率,限制了其向大功率方向的发展.研究了一种具有较高效率的大功率钒酸钇连续输出激光器,通过采用简单的折叠腔设计和对腔镜镀适当的介质膜,抑制了波长为1 064 nm和1 342 nm的高增益谱线.当泵浦功率为29 W时,输出功率高达6.5 W,斜效率为37.9%,光光转换效率为22.4%.
참녀범산을작위일충중요적격광증익개질,이기수격발사절면대、대809 nm파장존재흔강적관흡수대、편진발사등우점,재LD단면빙포전고태격광기중득도료엄범적응용,기중비교유응용개치적수격발사보선위1 064 nm,1 342 nm화914 nm.유우914 nm보선속준삼능급결구,이급범산을정체교저적열도솔,한제료기향대공솔방향적발전.연구료일충구유교고효솔적대공솔범산을련속수출격광기,통과채용간단적절첩강설계화대강경도괄당적개질막,억제료파장위1 064 nm화1 342 nm적고증익보선.당빙포공솔위29 W시,수출공솔고체6.5 W,사효솔위37.9%,광광전환효솔위22.4%.
As an important laser active medium, Nd: YVO4 is widely used in LD end-pumped solidstate lasers due to its large stimulated emission cross section, very strong broad absorption band at 809 nm and polarized emission,etc, and it has three useful stimulated emission spectra of 1 064 nm,1 342 nm and 914 nm but the quasi three level of 914 nm spectum and the low thermal conductivity of YVO4 crystal limit the development of its high power laser output. An efficient high power LD-endpumped continuous-wave (CW) Nd: YVO4 laser has been developed by restraining the high gains at wavelengths of 1 064 nm and 1 342 nm with a simple folded cavity and suitable medium film applied on its three mirrors. An output power of 6.5 W, slope efficiency of 37.9% and optical-to-optical conversion efficiency of 22.4% can be achieved when the pump power is 29 W.