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Pump Wavelength Dependence of Photodarkening in Yb-Doped Fibers
Huizi Li,Liling Zhang,Sidharthan, Raghuraman,Ho, Daryl,Xuan Wu,Venkatram, Nalla,Handong Sun,Tianye Huang,Seongwoo Yoo IEEE 2017 Journal of Lightwave Technology Vol. No.
<P>Photodarkening in Yb-doped fibers is known to be dependent of Yb population inversion. In addition to this dependence, we report that pump wavelength selection plays a significant role in photodarkening dynamics. It is found that 976 nm pump source can lead to more severe photodarkening effects than 916 nm pumping at the same inversion levels. This observation is consistent in Yb-doped fibers with various compositions. Our work reveals pump wavelength is another determinant factor of photodarkening besides the inversion level and emphasizes the importance of pump wavelength selection in high power Yb-doped fiber lasers and amplifiers.</P>
Leigh, Jason,Renambot, Luc,Johnson, Andrew,Jeong, Byungil,Jagodic, Ratko,Schwarz, Nicholas,Svistula, Dmitry,Singh, Rajvikram,Aguilera, Julieta,Wang, Xi,Vishwanath, Venkatram,Lopez, Brenda,Sandin, Dan Elsevier 2006 Future generation computer systems Vol.22 No.8
<P><B>Abstract</B></P><P>The research outlined in this paper marks an initial global cooperative effort between visualization and collaboration researchers to build a persistent virtual visualization facility linked by ultra-high-speed optical networks. The goal is to enable the comprehensive and synergistic research and development of the necessary hardware, software and interaction techniques to realize the next generation of end-user tools for scientists to collaborate on the global Lambda Grid. This paper outlines some of the visualization research projects that were demonstrated at the iGrid 2005 workshop in San Diego, California.</P>