【作者】 吴朝晖； 杨四刚； 王小建； 陈明华； 陈宏伟； 谢世钟；

【Author】 WU Zhao-hui;YANG Si-gang;WANG Xiao-jian;CHEN Ming-hua;CHEN Hong-wei;XIE Shi-zhong;Department of Electronic Engineering, Tsinghua University;

【机构】 清华大学电子工程系；

【摘要】 报道了基于窄带可调谐的全光纤高相干参量光源作为泵浦,通过差频产生窄带太赫兹波。使用自制的低重复率、窄带宽的锁模激光器作为泵浦,使用两级参量放大制成双波长源,使用双包层铒镱共掺光纤放大器进行高功率放大,注入4-(4-二甲氨基苯乙烯基)甲基吡啶2,4,6-三甲基苯磺酸盐(DSTMS)有机晶体中,采用共线相位匹配技术,利用DSTMS晶体的非线性差频效应,产生了1.25THz的太赫兹波。其功率为300n W、脉宽600ps、带宽约800MHz。更多还原

【Abstract】 A narrowband tunable terahertz(THz) generation system is built based on difference generation method pumped by an all-fiber highly coherent light source from optical parametric process. A homemade low repetition, narrowband mode locked fiber laser is used to pump two stage parameter amplifier to produce highly coherent dual-wavelength source, which is amplified by Er/Yb co-doped double-clad fiber. That source is injected into organic crystal 4-N, N-dimethylamino-4′-N′-methyl-stilbazolium 2, 4, 6-trimethylbenzenesulfonate(DSTMS), to generate THz wave at 1.25 THz from nonlinear difference generation on the condition of collinear phase-matching. The output power of THz wave is 300 n W, temporal width about 600 ps and bandwidth about 800 MHz.更多还原