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Pulsed pump wavelength exchange for high speed signal de-multiplexing
C H Kwok1, Bill P P Kuo, Kenneth K Wong
1Department of Electrical and Electronic Engineering, Photonic Systems Research Laboratory, The University of Hong Kong Pokfulam Road, Hong Kong.
Optics Express
|July 24, 2008
Summary
Researchers demonstrated all-optical time de-multiplexing using pulsed pump wavelength exchange in nonlinear fiber. This method successfully de-multiplexed 80 Gb/s return-to-zero signals into eight 10 Gb/s signals with error-free operation.
Area of Science:
- Optoelectronics and Photonics
- Nonlinear Fiber Optics
- Optical Communications
Background:
- High-speed optical signal processing is crucial for modern telecommunications.
- All-optical signal de-multiplexing reduces the need for electronic conversions, improving speed and efficiency.
- Nonlinear fiber optics offers unique properties for manipulating light signals.
Purpose of the Study:
- To experimentally demonstrate all-optical time de-multiplexing using pulsed pump wavelength exchange.
- To achieve ultra-fast power switching for de-multiplexing high-speed optical signals.
- To validate the feasibility of wide-band phase-matching in fiber-based nonlinear parametric processes.
Main Methods:
- Utilizing a highly nonlinear dispersion-shifted fiber.
- Employing orthogonal pulsed pump and continuous wave (cw) pump for wavelength exchange.
- Implementing an all-optical 1:8 de-multiplexer architecture.
Main Results:
- Successful experimental demonstration of pulsed pump wavelength exchange for de-multiplexing.
- Achieved error-free operation for all time de-multiplexed 10 Gb/s return-to-zero (RZ) signals.
- Demonstrated a low power penalty of less than or equal to 2.1 dB at a 10(-9) bit-error rate.
- Confirmed the feasibility of wide-band phase-matching for fiber-based nonlinear parametric processes.
Conclusions:
- Pulsed pump wavelength exchange is a viable technique for all-optical time de-multiplexing.
- The proposed method enables ultra-fast switching for high-speed optical signal processing.
- Fiber-based nonlinear parametric processes can support wide-band phase-matching, crucial for advanced optical functionalities.
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