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Creating very slow optical gap solitons with a grating-assisted coupler
R Shnaiderman1, Richard S Tasgal, Y B Band
1Department of Chemistry and the Ilse Katz Center for Nano-Science, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel.
Optics Letters
|July 5, 2011
Summary
Researchers created slow optical gap solitons using a grating-assisted coupler. These solitons, moving at 4% of light speed, can be slowed further or stopped by colliding them.
Area of Science:
- Nonlinear optics
- Fiber optics
- Soliton physics
Background:
- Optical solitons are self-reinforcing light pulses.
- Controlling soliton velocity is crucial for optical signal processing.
- Previous methods for slowing solitons were limited.
Purpose of the Study:
- To demonstrate the creation of slow optical gap solitons.
- To investigate soliton velocity control using novel coupling mechanisms.
- To explore soliton collisions for further velocity reduction.
Main Methods:
- Utilized a grating-assisted coupler, a fiber Bragg grating coupled to a non-Bragg fiber.
- Coupled forward- and backward-moving pulses within the non-Bragg fiber into the Bragg fiber.
- Observed soliton formation and propagation beyond the coupling region.
Main Results:
- Successfully produced optical gap solitons with velocities as low as 4% of the group velocity of light.
- Demonstrated that colliding two such solitons can result in an even slower or stopped soliton.
- Showcased the effectiveness of grating-assisted couplers for soliton velocity manipulation.
Conclusions:
- Grating-assisted couplers provide a viable method for generating and controlling slow optical solitons.
- Soliton collisions offer a pathway to achieve near-zero velocities.
- This work has implications for advanced optical communication and signal processing.
