Simultaneous all-solid-state multi-wavelength lasers——a promising pump source for generating highly coherent terahertz waves

作     者：刘欢 徐德刚 姚建铨 

作者机构：Institute of Laser and OptoelectronicsCollege of Precision Instrument and Optoelectronics EngineeringTianjin University Center for Photonics and ElectronicsState Key Laboratory of TribologyDepartment of Precision InstrumentsTsinghua University 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2009年第18卷第3期

页      面：1077-1084页

核心收录：

学科分类：080901[工学-物理电子学] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080401[工学-精密仪器及机械] 0804[工学-仪器科学与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 0704[理学-天文学] 0803[工学-光学工程] 

基　　金：supported by the National Basic Research Program of China (Grant No 2007CB310403) the Tianjin Municipal Primary application and Frontier Technology Research Plan,China (Grant No 07JCYBJC06200) 

主　　题：end-pumped Nd:YAG laser dual-wavelength laser acousto-optic Q-switch terahertz wave 

摘      要：A diode-end-pumped Nd：YAG dual-wavelength laser operating at 1319 and 1338 nm is demonstrated. The maximum average output power of the quasi-continuous wave linearly polarized dual-wavelength laser is obtained to be 2.1 W at a repetition rate of 50 kHz with an output power instability of less than 0.38% and beam quality factor M^2 of 1.45. Using the two lines, the highly coherent and narrow linewidth terahertz radiation of 3.23 THz can be generated in an organic 4-N, N-dimethylamino-methyl-stilbazolium tosylate （DAST） crystal. Meanwhile, the multi-wavelength red laser at 659.5, 664 and 669 nm is generated by frequency doubling and sum frequency processes in a lithium triborate （LBO） crystal. The average red laser output power is enhanced up to 1.625 W at a repetition rate of 15 kHz with an output power instability of better than 0.53% and beam quality factor M^2 of 6.05. Using the three lines, it is possible to generate the multi-wavelength THz radiation of 3.3, 3.43 and 6.73 THz in an appropriate difference frequency crystal.