(F,K,1) optical orthogonal codes (OOC's) are the best address codes applied to optical code division multiple access (OCDMA) communication systems. But the construction of the maximal number of the codes, that is the construction of an optimal (F,K,1) OOC's, is very difficult. An algorithm of construction of the OOC's and a method of computer aided design are presented, by which desired optimal (F,K,1) OOC's can be easily constructed.