Here, in this proposed scheme the significant advantage is that the decoding operation is all-optical in nature. The architecture can be used for generalized decoding scheme. This scheme can easily and successfully be extended and implemented for any higher number of input digits by proper incorporation of NOLM based optical switches, vertical and horizontal extension of the tree and by suitable branch selection. It is also very interesting that the reverse tree architecture can be used for all-optical encoding scheme. It is important to note that the above discussions are based on simple...