scholarly journals All-Optical Reversible Logic Gates with Optically Controlled Bacteriorhodopsin Protein-Coated Microresonators

2012 ◽  
Vol 2012 ◽  
pp. 1-12 ◽  
Author(s):  
Sukhdev Roy ◽  
Purnima Sethi ◽  
Juraj Topolancik ◽  
Frank Vollmer
Keyword(s):  
Low Power ◽  
Power Control ◽  
Near Infrared ◽  
Optical Switch ◽  
Logic Gates ◽  
Single Mode ◽  
Practical Applications ◽  
Control Signals ◽  
All Optical ◽  
Reversible Logic Gates

We present designs of all-optical reversible gates, namely, Feynman, Toffoli, Peres, and Feynman double gates, with optically controlled microresonators. To demonstrate the applicability, a bacteriorhodopsin protein-coated silica microcavity in contact between two tapered single-mode fibers has been used as an all-optical switch. Low-power control signals (<200 μW) at 532 nm and at 405 nm control the conformational states of the protein to switch a near infrared signal laser beam at 1310 or 1550 nm. This configuration has been used as a template to design four-port tunable resonant coupler logic gates. The proposed designs are general and can be implemented in both fiber-optic and integrated-optic formats and with any other coated photosensitive material. Advantages of directed logic, high Q-factor, tunability, compactness, low-power control signals, high fan-out, and flexibility of cascading switches in 2D/3D architectures to form circuits make the designs promising for practical applications.

scholarly journals 1-GHz All-Optical Flip-Flop Operation of Conventional Cylindrical-Shaped Single-Mode VCSELs Under Low-Power Optical Injection

2010 ◽  
Vol 22 (23) ◽  
pp. 1759-1761 ◽  
Author(s):  
Seoung Hun Lee ◽  
Hae Won Jung ◽  
Kyong Hon Kim ◽  
Min Hee Lee ◽  
Byeung-Soo Yoo ◽  
...  
Keyword(s):  
Low Power ◽  
Single Mode ◽  
Optical Injection ◽  
Flip Flop ◽  
All Optical

Design of Combinational Circuits Using Reversible Decoder in Tanner Tools

2020 ◽  
Vol 17 (4) ◽  
pp. 1743-1751
Author(s):  
R. Kannan ◽  
K. Vidhya
Keyword(s):  
Low Power ◽  
Optical Computing ◽  
Logic Gates ◽  
Full Adder ◽  
Reversible Logic ◽  
Quantum Cost ◽  
Combinational Circuits ◽  
Nano Technology ◽  
Feynman Gate ◽  
Reversible Logic Gates

Reversible logic is the emerging field for research in present era. The aim of this paper is to realize different types of combinational circuits like full-adder, full-subtractor, multiplexer and comparator using reversible decoder circuit with minimum quantum cost. Reversible decoder is designed using Fredkin gates with minimum Quantum cost. There are many reversible logic gates like Fredkin Gate, Feynman Gate, Double Feynman Gate, Peres Gate, Seynman Gate and many more. Reversible logic is defined as the logic in which the number output lines are equal to the number of input lines i.e., the n-input and k-output Boolean function F(X1,X2,X3, ...,Xn) (referred to as (n,k) function) is said to be reversible if and only if (i) n is equal to k and (ii) each input pattern is mapped uniquely to output pattern. The gate must run forward and backward that is the inputs can also be retrieved from outputs. When the device obeys these two conditions then the second law of thermo-dynamics guarantees that it dissipates no heat. Fan-out and Feed-back are not allowed in Logical Reversibility. Reversible Logic owns its applications in various fields which include Quantum Computing, Optical Computing, Nano-technology, Computer Graphics, low power VLSI etc. Reversible logic is gaining its own importance in recent years largely due to its property of low power consumption. The comparative study in terms of garbage outputs, Quantum Cost, numbers of gates are also presented. The Circuit has been implemented and simulated using Tannaer tools v15.0 software.

All-Optical Digital Logic Gates Using Single-Mode Fabry–PÉrot Laser Diode

2009 ◽  
Vol 21 (19) ◽  
pp. 1468-1470 ◽  
Author(s):  
M.R. Uddin ◽  
J.S. Lim ◽  
Y.D. Jeong ◽  
Y.H. Won
Keyword(s):  
Laser Diode ◽  
Logic Gates ◽  
Single Mode ◽  
Digital Logic ◽  
Fabry Perot ◽  
All Optical
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