[1] Nanchang Hangkong Univ, Minist Educ, Key Lab Nondestruct Test, Nanchang 330063, Jiangxi, Peoples R China
[2] Northumbria Univ, Fac Engn & Environm, Newcastle Upon Tyne NE1 8ST, Tyne & Wear, England
[3] Beijing Univ Posts & Telecommun, Sch Elect Engn, Beijing 100876, Peoples R China
[4] Univ Sci & Technol Beijing, Res Ctr Convergence Networks & Ubiquitous Serv, Beijing 100083, Peoples R China
[5] Shenzhen Univ, Key Lab Optoelect Devices & Syst, Minist Educ & Guangdong Prov, Coll Phys & Optoelect Engn, Shenzhen 518060, Peoples R China
[6] Nanjing Univ Informat Sci & Technol, Sch Phys & Optoelect Engn, Nanjing 210044, Peoples R China
[7] Technol Univ Dublin, Photon Res Ctr, Dublin D08 NF82 8, Ireland