Regenerated gratings John Canning, Somnath Bandyopadhyay, Michael Stevenson, Palas Biswas, Jacob Fenton and Mattias Aslund J. Eur. Opt. Soc.-Rapid Publ., 4 (2009) 09052 Published online: 22 December 2009 DOI: 10.2971/jeos.2009.09052