论文部分内容阅读
针对由YDFL和EDFL作为基频光源的QPM-DFG激光系统,利用PPMgLN晶体的色散关系及其温度特性,有效拓宽了QPM波长接受带宽.模拟结果表明,当采用1550和1060nm波段的EDFL和YDFL分别作为DFG的信号和抽运光源时,对于相同的中红外波段,满足QPM条件所允许的抽运光波长变化范围远大于信号光波长变化范围.当固定信号光波长为1560nm时,对于给定的晶体温度,1060nm波段抽运光的QPM接受带宽超过17nm,对应于中红外差频光带宽可约180nm.采用多波长YDFL作为抽运源,单波长EDFL后接EDFA作为信号源,在保持PPMgLN晶体温度和极化周期73.5℃和30μm不变的前提下,实验获得了波长间隔为14nm的14个中红外激光波长的同时输出,并且,改变信号光波长,可实现对这种中红外多波长激光的同步调谐.
For the QPM-DFG laser system with YDFL and EDFL as the fundamental light source, the acceptance bandwidth of QPM wavelength is effectively broadened by the dispersion relation and temperature characteristics of PPMgLN crystal.The simulation results show that when EDFL and YDFL are adopted respectively in 1550 and 1060 nm band As the DFG signal and pumping light source, the range of variation of the pump light wavelength that is allowed by the QPM condition is much larger than that of the signal light for the same mid-infrared wave band. When the wavelength of the fixed signal light is 1560 nm, Crystal temperature, 1060nm band pumping light QPM receiving bandwidth of more than 17nm, corresponding to the mid-infrared difference frequency optical bandwidth of about 180nm. Multi-wavelength YDFL as the pumping source, single-wavelength EDFL followed by EDFA as a signal source, while maintaining the PPMgLN crystal Temperature and polarization period of 73.5 ℃ and 30μm constant under the premise of the experiment obtained at 14nm wavelength separation of the 14 mid-infrared laser wavelength of the simultaneous output, and to change the wavelength of the signal light can be achieved on this multi-wavelength infrared laser Synchronous tuning.