  This study presents the implementation of an all-optical binary logic half
adder by employing triple core photonic crystal fiber (TPCF). The noteworthy
feature of the present investigation is that an identical set of TPCF schemes,
which demonstrated all-optical logic functions in our previous report has
revealed the ability to demonstrate the successful half adder operation. The
control signal (CS) power defining the extinction ratios of the output ports
for the considered symmetric planar and triangular TPCFs are evaluated through
numerical algorithm. Through suitable CS power and input combinations, the
logic outputs are generated from extinction ratios to demonstrate the half
adder operation. The results obtained display the significant influence of the
input conditions on the delivery of half adder operation for different TPCF
schemes considered. Furthermore, chloroform filled TPCF structures demonstrated
the efficient low power half adder operation with significant figure of merit,
compared to that of the silica counterpart.
