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Submitted on: 27 November 2006.
Revised on: 18 March 2007.
Accepted on: 12 May 2007.
___________________IEEE JOURNAL OF QUANTUM ELECTRONICS
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http://reply.papertrans.cn/2/119/11812/11812-34.png
Submitted on: 24 September 2010.
Revised on: 13 November 2010.
Accepted on: 04 January 2011.
___________________IEEE JOURNAL OF QUANTUM ELECTRONICS
Submitted on: 12 December 2014.
Revised on: 27 January 2015.
Accepted on: 09 March 2015.
___________________IEEE JOURNAL OF QUANTUM ELECTRONICS