scholarly journals Investigations and Simulations of All optical Switches in linear state Based on Photonic Crystal Directional Coupler

2014 ◽  
Vol 3 (1) ◽  
pp. 66 ◽  
Author(s):  
S. Maktoobi ◽  
R. Ghayour
Keyword(s):  
Signal Processing ◽  
Photonic Crystal ◽  
Optical Switching ◽  
Directional Coupler ◽  
Optical Signal ◽  
Optical Switches ◽  
Crystal Lattices ◽  
All Optical ◽  
Signal Processing Systems ◽  
Linear State

Switching is a principle process in digital computers and signal processing systems. The growth of optical signal processing systems, draws particular attention to design of ultra-fast optical switches. In this paper, All Optical Switches in linear state Based On photonic crystal Directional coupler is analyzed and simulated. Among different methods, the finite difference time domain method (FDTD) is a preferable method and is used. We have studied the application of photonic crystal lattices, the physics of optical switching and photonic crystal Directional coupler. In this paper, Electric field intensity and the power output that are two factors to improve the switching performance and the device efficiency are investigated and simulated. All simulations are performed by COMSOL software.

Ultrafast optical signal processing with hybrid-integrated symmetric Mach-Zehnder all-optical switches

2003 ◽  
Author(s):  
Shigeru Nakamura ◽  
Takemasa Tamanuki ◽  
Morio Takahashi ◽  
Takanori Shimizu ◽  
Satoshi Ae ◽  
...  
Keyword(s):  
Signal Processing ◽  
Optical Signal Processing ◽  
Optical Signal ◽  
Optical Switches ◽  
Ultrafast Optical ◽  
All Optical

Black phosphorus quantum dot based all-optical signal processing: ultrafast optical switching and wavelength converting

2019 ◽  
Vol 30 (41) ◽  
pp. 415202 ◽  
Author(s):  
Ke Wang ◽  
Yunxiang Chen ◽  
Jilin Zheng ◽  
Yanqi Ge ◽  
Jianhua Ji ◽  
...  
Keyword(s):  
Signal Processing ◽  
Quantum Dot ◽  
Optical Switching ◽  
Optical Signal Processing ◽  
Optical Signal ◽  
Black Phosphorus ◽  
Ultrafast Optical ◽  
All Optical

Ultrahigh-efficiency enhancedfour-wave-mixing in Si-Ge-Graphene photonic crystal waveguide

2021 ◽  
Vol 01 ◽  
Author(s):  
Yujun Hou ◽  
Chun Jiang
Keyword(s):  
Signal Processing ◽  
Photonic Crystal ◽  
Conversion Efficiency ◽  
Optical Signal Processing ◽  
Four Wave Mixing ◽  
Optical Signal ◽  
Wave Mixing ◽  
Photonic Crystal Waveguide ◽  
Optical Processing ◽  
All Optical

Background: All-optical processing has a huge superiority in speed and efficiency than traditional optical-electrical-optical signal processing. Four-wave-mixing is an important nonlinear parametric process to achieve all-optical processing. Objective: We proposed the photonic crystal waveguide to enhance the conversion efficiency of four-wave-mixingsignificantly in practical application. Methods: We demonstrate a waveguide composed of silicon with mono-layer graphene coated as core and Si-Ge distributed periodically on both sides as cladding. By the introduction of slow light effect of Si-Ge photonic crystal and the localization effect of graphene, the conversion efficiency of four-wave-mixing has enhanced dramatically. Results: The conversion efficiency can be increased by 16dB compared with silicon waveguide and the maximum efficiency as high as -9.1dB can be achieved in the Si-Ge-Graphene photonic crystal waveguide (SGG-PhCWG).The propagation loss can be decreased as small as 0.032dB/cm. Conclusions: Numerical results of proposed SGG-PhCWGmatch well with nonlinear coupled-mode theory. This configuration offers a new physical mechanism and solution for all-optical signal processing and high efficiency nonlinear nanoscale devices.

scholarly journals All-optical switching structure based on a photonic crystal directional coupler

2004 ◽  
Vol 12 (1) ◽  
pp. 161 ◽  
Author(s):  
F. Cuesta-Soto ◽  
A. Martínez ◽  
J. García ◽  
F. Ramos ◽  
P. Sanchis ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Optical Switching ◽  
Directional Coupler ◽  
All Optical ◽  
Switching Structure ◽  
All Optical Switching

scholarly journals Design of All-Optical Directional Coupler Using Plasmonic MIM Waveguide for Switching Applications

2021 ◽  
Author(s):  
Rupalin Nanda ◽  
Ramakrushna Rath ◽  
Sandip Swarnakar ◽  
Santosh Kumar
Keyword(s):  
Optical Switching ◽  
Directional Coupler ◽  
Fdtd Method ◽  
Optical Signal ◽  
Separation Distance ◽  
Propagation Loss ◽  
Slab Waveguide ◽  
Plasmonic Waveguides ◽  
Metal Insulator Metal ◽  
All Optical

Abstract In this paper, we have proposed, analyzed, and verified theperformance of an optimized plasmonic 10-dB directional coupler and a 3-dB directional coupler in 2-D plasmonic waveguides using finite-difference-time-domain (FDTD) method. A plasmonic 10-dB directional coupler and a 3-dB directional coupler are based on the metal-insulator-metal (MIM) slab waveguide and analyzed at the telecommunication wavelength (λ) of 1550 nm. Here, coupling and transmission characteristics are analyzed with the optimized separation distance between the two parallel waveguides. The developed approach ensures the minimization of the crosstalk and overall directional coupler length via simultaneous adjustment of the separation distance between the parallel waveguide and length of the linear waveguide. Then an optimized structure is acquired by trading off between coupling length and separation distance. The proposed 10-dB directional coupler and 3-dB directional coupler features good energy confinement, ultra-compact and low propagation loss, which has potential applications in photonic integrated devices, optical signal processors, and other all-optical switching devices.

Sign in / Sign up

Export Citation Format

Share Document