【摘 要】
:
Based on the modified ramp and fire technique, a novel injection seeding approach with real-time resonance tracking is successfully demonstrated in a single-frequency Nd:YAG pulsed laser. Appling a high-frequency sinusoidal modulation voltage to one piezo
【机 构】
:
KeyLaboratoryofSpaceLaserCommunicationandDetectionTechnology,ShanghaiInstituteofOpticsandFineMechani
【出 处】
:
ChineseOpticsLetters
论文部分内容阅读
Based on the modified ramp and fire technique, a novel injection seeding approach with real-time resonance tracking is successfully demonstrated in a single-frequency Nd:YAG pulsed laser. Appling a high-frequency sinusoidal modulation voltage to one piezo actuator and an adjustable DC voltage to another piezo actuator for active feedback, single-mode laser output with high-frequency stability is obtained, and the effect of the piezo hysteresis on the frequency stability can be eliminated for a laser diode pumped Q-switched Nd:YAG laser at a repetition rate of 400 Hz.
其他文献
The output characteristics of neodymium-doped gadolinium vanadate (Nd:GdVO4) crystals laser with dual c-axis orthogonal gains end-pumped by two fiber-coupled diode lasers are investigated. With two 1 W semiconductor diode lasers pumping, the ou
详细研究了n型AlGaN限制层与InGaN上波导对GaN基绿光激光器光场分布与电学特性的影响,结果表明:增加n型AlGaN限制层厚度或提高InGaN上波导中的铟组分可以明显抑制GaN基绿光激光器的光场泄漏,改善光场分布;相比In0.02Ga0.98N上波导,采用更高铟组分的In0.05Ga0.95N上波导可增加光场限制因子,改善绿光激光器的性能。综合调控n型限制层和上波导才能有效改善GaN基绿光激光器的光场分布,提高激光器的性能。
实验研究了掺Er3 和Yb3 /Er3 石英光纤中的倍频过程.测量了不同Er3 和Yb3 /Er3 掺杂量的光纤倍频转换效率和光纤倍频预处理前后Er3 发射可见荧光的强度,探讨了Er3 和Yb3 掺杂对光纤中倍频过程的影响.
A possible correlation between second-order dispersion and glucose concentration is presented for the first time. The second-order dispersions of three different glucose concentrations: hypoglycemia, normal level, and hyperglycemia are analyzed over the w
ZnO/diamond-like carbon (DLC) thin films are deposited by pulsed laser deposition (PLD) on Si (111) wafer. Visible room-temperature photoluminescence (PL) is observed from ZnO/DLC thin films by fluorescence spectrophotometer. The Gaussian curve fitting of
叙述了放电CO混合激光器,其中,N2在放电中受到振动激励,然后与冷的CO混合,在低压高马赫数管道中、于5.0和5.8微米之间发生激光作用。叙述了用宽21厘米、高1.3厘米管道进行的实验结果。获得的最大激光功率为720瓦,相当于效率7%和21千瓦(千克/秒)-1的比功率。
镜头畸变是影响测量精度的关键因素之一。非度量镜头畸变校正方法直接将图像物理坐标系下的镜头畸变模型应用于图像像素坐标系,忽略了非单位纵横比的情况。通过对成像过程进行分析,得到了更精确的像素坐标表示的镜头畸变模型,对现有的镜头畸变模型进行了修正,考虑了纵横比对镜头畸变的影响。通过实验,对新模型的可行性进行了验证,实验结果表明,新的模型能够有效地提高了测量精度。
研究了以掠入射的平面偏振光激励的多孔硅的光致发光。实验结果显示,光的入射角对多孔硅的发光行为影响不大,然而,以z方向偏振光激励的发光强度明显高于以x方向偏振光激励的发光强度。激励光电场相对于样品表面的不同取向引起光致发光的差异,这反映多孔硅的光学性质是各向异性的,也排除了纯粹的硅量子点的集合作为多孔硅结构的可能性。