Reconfigurable Optical Chaotic Logic Operations with Fast Rate of Picoseconds Scale

Geliang XU; Jian XU; Lingli KONG; Qifeng HUANG; Xianting QIU; Yangyang GUO; Feng CHENG

doi:10.3788/gzxb20215005.0506008

Journals >Acta Photonica Sinica >Volume 50 >Issue 5 >Page 174 > Article

Acta Photonica Sinica
Vol. 50, Issue 5, 174 (2021)

Reconfigurable Optical Chaotic Logic Operations with Fast Rate of Picoseconds Scale

Geliang XU, Jian XU, Lingli KONG, Qifeng HUANG, Xianting QIU, Yangyang GUO, and Feng CHENG

Author Affiliations

School of Electronic Engineering， Chaohu University， Hefei238000， China

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DOI: 10.3788/gzxb20215005.0506008 Cite this Article

Geliang XU, Jian XU, Lingli KONG, Qifeng HUANG, Xianting QIU, Yangyang GUO, Feng CHENG. Reconfigurable Optical Chaotic Logic Operations with Fast Rate of Picoseconds Scale[J]. Acta Photonica Sinica, 2021, 50(5): 174 Copy Citation Text

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Fig. 1. Schematic diagram for reconfigurable chaotic logic operations of VCSEL with optical feedback

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Fig. 2. The implementation of chaotic logic AND (left column) and NAND (right column) operations

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Fig. 3. The implementation of chaotic logic OR (left column) and NOR (right column) operations

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Fig. 4. The implementation of chaotic logic XNOR (left column) and XOR (right column) operations

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Fig. 5. The implementation of chaotic logic NOT (left column) and reconfigurable operations (right column)

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Fig. 6. The success probability of reconfigurable chaotic logic operations under different noise intensity

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Fig. 7. The success probability of reconfigurable chaotic logic operation under different code width

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Parameter and symbol	Value	Parameter and symbol	value
Line-width enhancement factor a	3	Duty ratio R	0.5
field decay rate k	300	Polar angle θ/π	1/2
Spin relaxation rate γ_s/ns^-1	50	Azimuth φ	0
Nonradiative carrier relaxation γ_e/ns^-1	1	Crystal temperature F/ K	293
Dichroism γ_a/ns^-1	-0.1	Poled period of crystal Λ/m^-1	5.8×10⁵
Birefringence γ_p/ns^-1	2	Crystal length L/mm	15
Delay time τ/ns	2	Refractive index of o-light n₁	2.24
Effective refractive index of active layer n_g	3.6	Refractive index of e-light n₂	2.17
Effective area of light spot S_A/μm²	38.485	Differential material gain g/ m^3·s^-1	2.9×10^-12
Length of the laser cavity L_v/μm	10	Field confinement factor to the active region Γ	0.05
Optical feedback strength k_f	1.13	Volume of the active layer V/μm³	384.85
Code width T/ps	600	The noise intensity β_sp	2.5×10⁹

Table 1. The main parameters of the system

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Logic operations	(I₁, I₂) = (0, 0)		(I₁, I₂) = (0, 1) / (1, 0)		(I₁, I₂) = (1, 1)
Logic operations	L_c	A	L_c	A	L_c	A
$L_{c} = I_{1} \cdot I_{2}$	0	A_max=0	0	A_max=0	1	A_min=0.021
$L_{c} = \bar{I_{1} \cdot I_{2}}$	1	A_min=0.031	1	A_min=0.027	0	A_max=0.0014
$L_{c} = I_{1} + I_{2}$	0	A_max=0.0014	1	A_min=0.03	1	A_min=0.026
$L_{c} = \bar{I_{1} + I_{2}}$	1	A_min=0.034	0	A_max=0	0	A_max=0
$L_{c} = I_{1} \oplus I_{2}$	0	A_max=0.003	1	A_min=0.03	0	A_max=0.002
$L_{c} = I_{1} ⊙ I_{2}$	1	A_min=0.022	0	A_max=0	1	A_min=0.048
$L_{c} = \bar{I_{1}} (\bar{I_{2}})$	1	A_min=0.026	*	*	0	A_max=0.002

Table 2. For the different logic operations relationship between L_c and(I₁, I₂), the maximum average (A_max) of the x-PL intensity under L_c=0 and its minimum average (A_min) under L_c=1.

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