Submitted on: 28 November 2006.
Revised on: 11 February 2007.
Accepted on: 04 March 2007.
___________________Journal of Optics-India---SPRINGER INDIA
Submitted on: 27 September 2017.
Revised on: 18 January 2018.
Accepted on: 07 February 2018.
___________________Journal of Optics-India---SPRINGER INDIA
Submitted on: 07 May 2016.
Revised on: 18 July 2016.
Accepted on: 20 August 2016.
___________________Journal of Optics-India---SPRINGER INDIA
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Submitted on: 15 July 2001.
Revised on: 16 September 2001.
Accepted on: 25 October 2001.
___________________Journal of Optics-India---SPRINGER INDIA
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Submitted on: 03 January 2006.
Revised on: 04 February 2006.
Accepted on: 04 March 2006.
___________________Journal of Optics-India---SPRINGER INDIA
Submitted on: 13 May 2017.
Revised on: 10 July 2017.
Accepted on: 30 August 2017.
___________________Journal of Optics-India---SPRINGER INDIA