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All-optical flip-flop based on nonlinear effects in fiber Bragg gratings
Mohammad Karimi1, Majid Lafouti, Ali Asghar Amidiyan
1Iranian National Center for Laser Science and Technology, Tehran, Iran. karimi@physweb.ir
Applied Optics
|January 25, 2012
Summary
We developed a new all-optical R-S flip-flop using nonlinear fiber Bragg gratings (FBGs). A short optical pulse can switch the flip-flop state, enabling faster optical computing.
Area of Science:
- Photonics and Optical Engineering
- Nonlinear Optics
- Integrated Optics
Background:
- All-optical signal processing offers potential for high-speed computation.
- Fiber Bragg gratings (FBGs) are key components in optical systems.
- Nonlinear optical effects in FBGs can be exploited for switching applications.
Purpose of the Study:
- To demonstrate a novel passive all-optical R-S flip-flop design.
- To investigate the nonlinear behavior of FBGs for bistability.
- To explore the potential of FBGs in optical memory and logic circuits.
Main Methods:
- Numerical solving of coupled-mode equations to analyze FBG spectra.
- Investigation of the Kerr effect's influence on FBG characteristics.
- Simulation of continuous-wave (cw) and transient responses of nonlinear distributed feedback structures.
Main Results:
- A novel passive all-optical R-S flip-flop with separate set-rest ports was designed.
- Nonlinear-induced bistability in FBGs was studied.
- A 0.15 ns optical pulse was shown to effectively switch the flip-flop state.
Conclusions:
- The proposed FBG-based flip-flop is a viable component for all-optical circuits.
- The demonstrated switching capability highlights the potential for high-speed optical data processing.
- This design offers a pathway towards compact and efficient all-optical logic gates.
