原子与分子物理学报Issue(2)：286-290,5.DOI:10.3969/j.issn.1000-0364.2015.02.019
基于 LBO 晶体的高效千赫兹皮秒量级光学参量产生器
Efficient kHz picosecond LBO optical parametric generator
摘要
Abstract
We report a highly efficient optical parametric generator ( OPG) based on lithium triborate ( LBO) .A frequency doubled passively mode -locked diode -pumped Nd:YVO4 oscillator amplifier ( MOPA) system is used as the pump radiation source .Focusing according to the theory of Boyd and Kleinman leads to a pump pow-er density of 50 GW/cm2 , which is well below the damage threshold of LBO of 80 GW/cm2 .The overall conver-sion efficiency reaches a value of 72%measured at degeneracy .The tuning range of the OPG ranges from 760 nm (signal) to 1770 nm (idler) when referring to an overall conversion efficiency of 50%.The beam quality is excellent for conversion efficiencies below 40%(M2 <1.3).The typically 10 nm (RMS) broad spectrum can be narrowed by injection seeding the OPG .Injection seeding is demonstrated for a signal wavelength of 922.54 nm.A seed cw power of 30 nW is sufficient to reduce the spectral width to 0.1 nm ( RMS) .The measured in-jection-seeded OPG pulse duration is 9 ps ( FWHM).This results in a time -bandwidth product of 1.30, which is 4.1 times the theoretical limit of 0.315 for sech2-shaped pulses .关键词
LBO晶体/光学参量产生器/时间带宽积/种子光注入Key words
LBO crystal/Optical parametric generator (OPG)/Time-bandwidth/Injection seeding分类
数理科学引用本文复制引用
卢一鑫,吕印庄,杨露娜..基于 LBO 晶体的高效千赫兹皮秒量级光学参量产生器[J].原子与分子物理学报,2015,(2):286-290,5.基金项目
陕西省教育厅课题（2013JK0620）；西安市科技局课题 （）
