首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   8篇
  免费   14篇
物理学   22篇
  2022年   1篇
  2020年   1篇
  2019年   1篇
  2018年   1篇
  2017年   2篇
  2015年   1篇
  2014年   3篇
  2013年   2篇
  2012年   2篇
  2011年   5篇
  2009年   1篇
  2006年   2篇
排序方式: 共有22条查询结果,搜索用时 15 毫秒
1.
A high power linearly polarized tunable Raman random fiber laser(RFL) was studied theoretically and experimentally. The parameters required for the system design were obtained through numerical simulation, based on which a hundred-watt-level linearly polarized tunable RFL was successfully demonstrated. The central wavelength can be continuously tuned from 1113.76 to 1137.44 nm, and the output power exceeds 100 W for all of the lasing wavelengths with the polarization extinction ratio(PER) exceeding 20 d B at the maximum output power.Besides, the linewidth, spectral evolution, and temporal dynamics of a specified wavelength(1124.72 nm) were investigated in detail. Moreover, the theoretical results and the experimental results fit well. To the best of our knowledge, this is the first time for a hundred-watt-level linearly polarized tunable RFL ever reported.  相似文献   
2.
光纤激光同带抽运方案具有泵浦亮度高、量子亏损小等优势,有着巨大的功率提升潜力,是近年来国际上的研究热点。1018 nm光纤激光可作为高功率掺镱光纤激光器的高效同带抽运源,但是单个1018 nm光纤激光器输出功率有限,光束合成是突破这一局限的重要方案。基于19台单模1018 nm光纤激光器和一个191光纤功率合束器,搭建了一套全光纤结构激光合成系统,实现了5 kW的1018 nm合成激光输出。  相似文献   
3.
介绍了辐射平衡激光器原理以及谐振腔模型,并对腔内激光和泵浦光满足的方程进行了推导。计算了在Yb:KYW辐射平衡激光器谐振腔中激光和泵浦光光强的变化规律,以及输出端耦合镜反射率和腔长变化时带来的影响。讨论了腔长的最小值与输出端耦合镜反射率之间的关系。  相似文献   
4.
In this work, non-isothermal bleaching of Yb–Li co-doped fiber was investigated. The Yb–Li co-doped fiber was beneficial to reduce the photodarkening-induced excess loss and had no bad effect on the temperature of thermal bleaching(TB). Photodarkened fibers were bleached with different temperature ramp rates. The higher the ramp rate, the higher the complete bleaching temperature. The activation energy of the bleaching of Yb/Al/Li fiber was calculated by fitting, which was similar to that of an Yb-doped fiber. These observations are helpful in revealing the relationship between the mechanism of Li ion co-doping and TB.  相似文献   
5.
为了研究掺镱双包层单频光纤放大器中受激布里渊散射产生的规律,从含有受激布理渊散射的速率方程和热传导方程出发,对光纤放大器中的热效应问题进行了理论分析.讨论了泵浦功率、包层半径和换热系数对受激布理渊散射的影响,所得结论为实验研究单频光纤放大器中受激布理渊散射的变化规律提供了理论依据.  相似文献   
6.
报道了一台基于同带泵浦技术的主振荡功率放大(MOPA)结构超荧光光纤光源。首先利用自行搭建的超荧光种子源获得了半高全宽(FWHM)线宽10.3 nm的宽谱超荧光种子,经光谱滤波得到FWHM线宽1.8 nm的窄谱种子光;种子光经二级预放大器放大至104.4 W后注入主放大器;主放大器最高输出功率3.14 kW,最高输出功率时光光转换效率80.74%,光谱FWHM线宽4.68 nm,光束质量因子为1.59。进一步提高系统泵浦功率有望获得更高功率输出。  相似文献   
7.
 报道了一台实现了双纵模窄线宽激光输出的光纤拉曼放大器。利用中心波长1 079.7 nm的双纵模窄线宽种子激光器获得了频率间隔1.4 GHz、功率比约3∶1的双纵模输出,各纵模的线宽约为10 MHz;再利用1 031 nm泵浦光对双纵模种子光进行拉曼放大,实现了1.07 W双纵模激光输出。拉曼放大过程中,两个纵模的线宽、频率间隔及功率比保持得很好。  相似文献   
8.
Based on rate equations, a theoretical model of a fiber oscillator with a multimode gain fiber was built. We studied the effect of the rare earth doping profile in the core on the output characteristics of the multimode fiber oscillator. The results indicated that a pure fundamental mode can be obtained by partly doping the core of the large mode area (LMA) ytterbium doped fiber (YDF) in the fiber laser. Furthermore, a sole specific high-order mode can also be implemented by tailoring the rare earth doping profile according to the simulations. The mode coupling effect was also taken into account in the model. In spite of the mode coupling effect, the specific mode was able to dominate in the output of the fiber laser by utilizing the designed LMA YDF.  相似文献   
9.
 利用多抖动法对强泵浦条件下光纤放大器引入的相位噪声进行了测量。利用功率谱、积分谱对具体泵浦条件下的相位噪声特性进行定性分析,结果表明,泵浦功率越大,高频成分占的比例越大。利用结构函数定量分析相位噪声的变化特性,得出相位噪声控制系统的带宽需求指标。实验测得在71,181和230 W泵浦条件下,所需相位控制系统带宽最小值分别为830 Hz,3.1 kHz和10 kHz。  相似文献   
10.
Stimulated Raman scattering in a double cladding optical fiber is studied with a continuous wave laser used as a pump source. Under various launch conditions, pump modes are differently excited. Considering the mode coupling effect among the pump modes, the evolution of the power in the Stokes modes is studied. The results show that the scattered waves (the Stokes waves) in the fiber core with 9%tm diameter and 0.14 NA could propagate predominantly in the fundamental mode of the fiber by carefully adjusting the pump light launching conditions.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号