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Study of an efficient longitudinal multimode pumping scheme for Si-nc sensitized EDWAs
Optics Express
|June 25, 2009
Summary
This study introduces an efficient multimode longitudinal pumping scheme for Si-nanocluster-sensitized Erbium-doped waveguide amplifiers, improving pump intensity and population inversion uniformity. Material optimization is crucial for high-power applications to mitigate carrier absorption effects.
Area of Science:
- Photonics
- Materials Science
- Optoelectronics
Background:
- Single-mode and top pumping methods for Erbium-doped waveguide amplifiers face limitations.
- Si-nanoclusters offer sensitization for Erbium ions, enhancing amplifier performance.
Purpose of the Study:
- To present an efficient multimode longitudinal pumping scheme for Si-nanocluster-sensitized Erbium-doped waveguide amplifiers.
- To overcome limitations of existing pumping techniques.
Main Methods:
- Theoretical modeling using propagation and population-rate equations for the coupled Er(3+)/Si-nanoclusters system.
- Simulating evanescent pump light coupling from a multimode waveguide to the active core.
Main Results:
- The proposed scheme achieves high pump intensity and uniform population inversion in the active core.
- Confined carrier absorption significantly impacts amplifier performance at high pump intensities.
Conclusions:
- Multimode longitudinal pumping offers a promising, potentially low-cost approach for integrated amplifiers.
- Optimization of Si-nanocluster and Erbium concentrations is essential for high-performance devices.
