1. Date of download: 6/22/2016 Copyright © 2016 SPIE. All rights reserved. Basic principle and working condition of all-optical XNOR and XOR gate using SMFP-LD. (a) Block diagram. (b) Illustration of working principle in spectrum domain. (c) Truth table: A and B act as supporting beams and C acts as a major beam for XNOR operation. Figure Legend: From: All-optical exclusive-NOR and exclusive-OR logic gate based on multi-input injection locking in single mode Fabry–Pérot laser diode Opt. Eng. 2011;50(7):075201-075201-5. doi:10.1117/1.3595873

2. Date of download: 6/22/2016 Copyright © 2016 SPIE. All rights reserved. Experimental setup for all-optical XNOR and XOR gate. TL: Tunable laser; PC: Polarization controller; PPG: Pulse pattern generator; Mod: Modulator; CO: Coupler; OC: Optical circulator; BPF: Band pass filter. Figure Legend: From: All-optical exclusive-NOR and exclusive-OR logic gate based on multi-input injection locking in single mode Fabry–Pérot laser diode Opt. Eng. 2011;50(7):075201-075201-5. doi:10.1117/1.3595873

3. Date of download: 6/22/2016 Copyright © 2016 SPIE. All rights reserved. Optical power spectral traces for the output of SMFP-LD1 (C), output of SMFP-LD2 (E, XNOR), and output of SMFP-LD3 (F, XOR), where A and B are inputs; C, E, and F are outputs. (a) {A : B : C : E} = { 0 : 0 : 1 : 1}, (b) {A : B : C : E} = { 0 : 1 : 1 : 0}, (c) {A : B : C : E} = { 1 : 0 : 1 : 0}, (d) {A : B : C : E} = { 1: 1 : 0 : 1}, (e) {E : F} = { 0 : 1}, (f) {E : F} = {1 : 0}. Figure Legend: From: All-optical exclusive-NOR and exclusive-OR logic gate based on multi-input injection locking in single mode Fabry–Pérot laser diode Opt. Eng. 2011;50(7):075201-075201-5. doi:10.1117/1.3595873

4. Date of download: 6/22/2016 Copyright © 2016 SPIE. All rights reserved. Waveforms for the all-optical XNOR and XOR gate with inputs (A and B), and outputs (E and F), and their respective output eye diagrams. Figure Legend: From: All-optical exclusive-NOR and exclusive-OR logic gate based on multi-input injection locking in single mode Fabry–Pérot laser diode Opt. Eng. 2011;50(7):075201-075201-5. doi:10.1117/1.3595873

5. Date of download: 6/22/2016 Copyright © 2016 SPIE. All rights reserved. Rising edge and falling edge of (a) XNOR and (b) XOR. Figure Legend: From: All-optical exclusive-NOR and exclusive-OR logic gate based on multi-input injection locking in single mode Fabry–Pérot laser diode Opt. Eng. 2011;50(7):075201-075201-5. doi:10.1117/1.3595873