Anuar, M.S. and Aljunid, S.A. and Arief, A.R. and Junita, M.N. and Saad, N.M.  (2013) PIN versus Avalanche photodiode gain optimization in zero cross correlation optical code division multiple access system.  Optik, 124 (4).  pp. 371-375.  ISSN 00304026