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Cutoff solitons in axially uniform systems
Elefterios Lidorikis1, Marin Soljacić, Mihai Ibanescu
1Center for Materials Science and Engineering, Massachusetts Institute for Technology, Cambridge, Massachusetts 02139, USA. lidoriki@mit.edu
Optics Letters
|May 4, 2004
Summary
Researchers theoretically studied nonlinear photonic bandgap fibers, discovering "cutoff solitons." These solitons offer a novel approach for all-optical signal processing in optical fibers.
Area of Science:
- Nonlinear optics
- Photonics
- Fiber optics
Background:
- Nonlinear photonic bandgap fibers exhibit unique optical properties.
- Periodic modulation in nonlinear structures typically leads to gap solitons and bistability.
- Understanding dispersion relations is key to controlling light propagation.
Purpose of the Study:
- To theoretically investigate the optical response of axially uniform nonlinear photonic bandgap fibers.
- To explore the generation of gap-soliton-like phenomena and bistability in these fibers.
- To introduce and characterize a new type of soliton, termed 'cutoff solitons'.
Main Methods:
- Theoretical analysis of nonlinear photonic bandgap fibers.
- Examination of guided-mode dispersion relations.
- Investigation of solutions with zero group velocity.
Main Results:
- Observed gap-soliton-like generation and bistability in uniform nonlinear photonic bandgap fibers.
- Identified a frequency cutoff at zero wave vector in the dispersion relations.
- Naturally occurring zero group velocity solutions with minimal radiation coupling were found.
Conclusions:
- Axially uniform nonlinear photonic bandgap fibers can exhibit soliton-like behavior and bistability.
- These phenomena arise from specific dispersion characteristics, including a frequency cutoff.
- 'Cutoff solitons' present a promising alternative to traditional gap solitons for all-optical signal processing applications.