optical logic
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ACS Photonics ◽  
2022 ◽  
Author(s):  
Lu He ◽  
Furong Zhang ◽  
Huizhen Zhang ◽  
Ling-Jun Kong ◽  
Weixuan Zhang ◽  
...  

Plasmonics ◽  
2022 ◽  
Author(s):  
Rida El Haffar ◽  
Oussama Mahboub ◽  
Abdelkrim Farkhsi ◽  
Mustapha Figuigue

Micromachines ◽  
2022 ◽  
Vol 13 (1) ◽  
pp. 90
Author(s):  
Yuhang Hu ◽  
Zihao Yang ◽  
Nuo Chen ◽  
Hanwen Hu ◽  
Bowen Zhang ◽  
...  

Information capacity of single-mode fiber communication systems face fundamental limitations imposed by optical nonlinearities. Spatial division multiplexing (SDM) offers a new dimension for upgrading fiber communication systems. Many enabling integrated devices, such as mode multiplexers and multimode bending with low crosstalk, have been developed. On the other hand, all-optical signal processing (AOSP) can avoid optical to electrical to optical (O–E–O) conversion, which may potentially allow for a low cost and green operation for large-scale signal processing applications. In this paper, we show that the system performance of AOSP can be pushed further by benefiting from the existing technologies developed in spatial mode multiplexing (SDM). By identifying key technologies to balance the impacts from mode-dependent loss, crosstalk and nonlinearities, three-channel 40 Gbit/s optical logic operations are demonstrated using the first three spatial modes in a single multimode waveguide. The fabricated device has a broadband four-wave mixing operation bandwidth (>20 nm) as well as high conversion efficiency (>−20 dB) for all spatial modes, showing the potential for a large-scale signal processing capacity with the combination of wavelength division multiplexing (WDM) and SDM in the future.


2022 ◽  
Vol 54 (2) ◽  
Author(s):  
Anup Sharma ◽  
Kamanashis Goswami ◽  
Haraprasad Mondal ◽  
Tanmoy Datta ◽  
Mrinal Sen

2021 ◽  
Author(s):  
Ipshitha Charles ◽  
Alluru Sreev ◽  
SabbiVamshi Krishna ◽  
Sandip Swarnakar ◽  
Santosh Kumar

Abstract In this digital era, all-optical logic gates (OLGs) proved its effectiveness in execution of high-speed computations. A unique construction of an all-optical OR, NOR, NAND gates based on the notion of power combiner employing metal–insulator–metal (MIM) waveguide in the Y-shape in a minimal imprint of 6.2 µm × 3 µm is presented and the structure is evaluated by finite-difference time-domain (FDTD) technique. The insertion loss (IL) and extinction-ratio (ER) for proposed model are 6 dB and 27.76 dB for NAND gate, 2 dB and 20.35 dB for NOR gate and 6 dB and 24.10 dB respectively. The simplified model is used in the construction of complex circuits to achieve greater efficiency, which contributes to the emergence of a new technique for designing plasmonic integrated circuits.


2021 ◽  
Author(s):  
Jun Shiomi ◽  
Shuya Kotsugi ◽  
Boyu Dong ◽  
Hidetoshi Onodera ◽  
Akihiko Shinya ◽  
...  
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2021 ◽  
Author(s):  
Sasan Mohammadian ◽  
Farshad Babazadeh ◽  
Kambiz Abedi

Abstract Based on ring resonator with Microelectromechanical systems, optical XOR logic gate is proposed in this paper to realize the optical logic gate application. The proposed gate is basically structured on an optical ring resonator with 7µm radius and resonance wavelength of 1.55µm which is placed on the edge of a thin SiC circular diaphragm. In order to apply input voltages to electrodes, two very thin circular gold layers with 50nm air gap spacing are deposited under the diaphragm. Input voltages are considered as logic inputs and resonance wavelength shift as logic output. When an input DC voltage is applied across the diaphragm, an attractive electrostatic force is created between two electrodes. As a result, the diaphragm is deformed and an internal stress is created. This in turn changes the resonator refractive index due to the photoelastic effect and thus shifts its resonance wavelength about 35nm. COMSOL Multiphysics and MATLAB are carried out to verify FEA and numerical analysis of the designed structure, respectively. A good agreement between the simulations and analytical results is obtained. Enhancement of the wavelength shift and FSR are resulted. The proposed structure is used as an optical XOR gate for the first time.


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