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Ion-exchanged silica-on-silicon structured channel erbium-doped waveguide amplifiers
Zian He1, Yigang Li, Yingfeng Li
1Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Department of Optical Science and Engineering, School of Information Science and Engineering, Fudan University, Shanghai 200433, China.
Applied Optics
|June 22, 2011
Summary
Researchers developed novel erbium-doped waveguide amplifiers (EDWAs) using silica-on-silicon technology. These amplifiers achieved a 0.5 dB net gain and a 4.0 dB noise figure, demonstrating a promising alternative for optical amplification.
Area of Science:
- Photonics and Optical Engineering
- Materials Science and Engineering
- Integrated Optics
Background:
- Erbium-doped waveguide amplifiers (EDWAs) are crucial for optical communication systems.
- Developing cost-effective and high-performance EDWAs remains an active research area.
- Silica-on-silicon platforms offer potential for integrated optical devices.
Purpose of the Study:
- To fabricate and characterize silica-on-silicon structured channel erbium-doped waveguide amplifiers (EDWAs).
- To investigate the influence of waveguide structure and doping levels on EDWA gain properties.
- To demonstrate an alternative fabrication approach for high-performance EDWAs.
Main Methods:
- Fabrication of EDWAs using a combination of ion-exchange and sol-gel techniques on a silica-on-silicon platform.
- Optimization of waveguide structures to maximize pump and signal mode intensity overlap.
- Characterization of small signal gain and noise figure at 1531 nm.
Main Results:
- Achieved a small signal fiber-device-fiber net gain of 0.5 dB for a 4 cm long EDWA.
- Obtained a low noise figure of 4.0 dB.
- Demonstrated that optimizing mode intensity overlap enhances the gain spectrum.
Conclusions:
- The ion-exchanged silica-on-silicon waveguide structure is a viable approach for EDWA fabrication.
- Further improvements in gain performance are possible by reducing upconversion efficiency.
- Optimized EDWAs show potential for practical application in optical amplification.
