摘要
对侧面抽运模块的抽运结构进行了优化,采用漫反射腔设计,利用3个激光二极管阵列(LDA)旋转对称抽运尺寸为Ф2mm×75mm,掺杂原子数分数为4%的钕玻璃棒。钕玻璃棒两端面镀有在1053nm高透率为99.8%的增透膜,为消除放大的自发辐射(ASE)光振荡,钕玻璃两端面采用1.5°倾角设计。放大器采用集体制冷,产生的热量由在热沉中流动的去离子水带走。能量10μJ,工作频率1Hz,脉冲宽度3ns,输出波长1053nm的种子激光经过钕玻璃放大器后,在抽运功率为8.2kW,抽运脉冲宽度为400μs时达到了70倍的稳定高增益,放大器的荧光分布均匀,脉冲波形图放大后无畸变。
With the optimized sidely pumped module structure,three laser diode arrays rotating symmetrically pump the Nd：glass rod.The size of the Nd：glass rod is Ф2 mm×75 mm,with the doping concentration of 4% atom fraction.The end surfaces of the rod are coated with antireflection film with high of 99.8% at 1053 nm,and the rod is tilted 1.5°in order to eliminate the oscillation of amplified spontaneous emission（ASE）.With collective cooling,generated heat is cleaned away by deionized water flowing in the heat-sink.The seed,with energy of 10 μJ,operating frequency of 1 Hz,pulse width of 3 ns,output wavelength of 1053 nm,through the Nd：glass amplifiers reaches 70 times stable high-gain when the pump power is 8.2 kW and the pulse width is 400 μs.Meanwhile,the fluorescence distribution of the amplifier is homogeneous.Comparing the pulse oscillogram before and after amplification,there was no distortion in the amplified waveform.
出处
《激光与光电子学进展》
CSCD
北大核心
2010年第6期80-83,共4页
Laser & Optoelectronics Progress
基金
国家863计划(2009AA03ZX1486490)
国家自然科学基金(60927010)资助课题
