[1] Ishizaka Y, Kawaguchi Y, Saitoh K et al. Design of optical XOR， XNOR， NAND， and OR logic gates based on multi-mode interference waveguides for binary-phase- shift-keyed signal[J]. Journal of Lightwave Technology, 29, 2836-2846(2011).

[2] Rakshit J K, Roy J N, Chattopadhyay T. All-optical XOR/XNOR logic gate using micro-ring resonator[C]. CODEC 2012(19).

[3] Kumar A, Kumar S, Raghuwanshi S K. Implementation of full adder and full subtractor based on electro optic effect in Mach Zehnder interferometers[J]. Optics Communications, 324, 93-107(2014).

[4] Rakshit J K, Roy J N. All-optical ultrafast switching in a silicon microring resonator and its application to design multiplexer/demultiplexer， adder/subtractor and comparator circuit[J]. Optica Applicata, 46, 517-539(2016).

[5] Gayen D K, Chattopadhyay T, Das M K et al. All-optical binary to Gray code and Gray to binary code conversion scheme with the help of semiconductor optical amplifier-assisted Sagnac switch[J]. IET Circuits Devices & Systems, 5, 123-131(2011).

[6] Chattopadhyay T, Sarkar T. All-optical switching by Kerr nonlinear prism and its application to of binary-to-gray-to-binary code conversion[J]. Optics & Laser Technology, 44, 1722-1728(2012).

[7] Jung Y J, Lee S. All-optical 4-bit Gray code to binary coded decimal converter[J]. Proceedings of SPIE-The International Society for Optical Engineering, 6890(2008).

[8] Chauhan C, Kumar S, Amphawan A. Design of BCD to excess 3 code converter using electro-optic effect of Mach-Zehnder interferometers[C](2016).

[9] Pal A, Kumar S, Sharma S. Binary to octal and octal to binary code converter using Mach‍⁃‍Zehnder interferometer for high speed communication[J]. Optical Communications, 38, 117-127(2017).