Submitted on: 23 August 2016.
Revised on: 22 October 2016.
Accepted on: 28 November 2016.
___________________Journal of Physics-Photonics---IOP PUBLISHING LTD
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Submitted on: 30 May 2005.
Revised on: 16 August 2005.
Accepted on: 27 September 2005.
___________________Journal of Physics-Photonics---IOP PUBLISHING LTD
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Submitted on: 10 June 2009.
Revised on: 29 July 2009.
Accepted on: 18 August 2009.
___________________Journal of Physics-Photonics---IOP PUBLISHING LTD
Submitted on: 07 October 2008.
Revised on: 19 January 2009.
Accepted on: 06 February 2009.
___________________Journal of Physics-Photonics---IOP PUBLISHING LTD
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Submitted on: 01 June 2019.
Revised on: 12 August 2019.
Accepted on: 31 August 2019.
___________________Journal of Physics-Photonics---IOP PUBLISHING LTD
Submitted on: 16 October 2011.
Revised on: 10 November 2011.
Accepted on: 01 January 2012.
___________________Journal of Physics-Photonics---IOP PUBLISHING LTD
Submitted on: 16 November 2019.
Revised on: 07 March 2020.
Accepted on: 05 May 2020.
___________________Journal of Physics-Photonics---IOP PUBLISHING LTD