References
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Sep 30, 2003·Optics Letters·Bingyuan ZhangYonggang Wang
Jan 28, 2004·Optics Letters·Junhai LiuHorst Weber
Oct 31, 2006·Optics Letters·Louis McDonaghAchim Nebel
Apr 19, 2007·Optics Letters·Louis McDonaghAchim Nebel
Feb 5, 2008·Optics Letters·Haohai YuHang Luo
Aug 6, 2008·Optics Express·Fengqin LiuHaijin Zhang
May 5, 2003·Optics Express·Alphan Sennaroglu, James Fujimoto
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Mar 21, 2005·Optics Express·Alexander KilliDaniel Kopf
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Apr 15, 2010·Optics Express·XuDong LiDeYing Chen
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Jul 21, 2015·Optics Express·Peng GaoXiaoyan Liang