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DPSK multicast using multiple-pump FWM in Bismuths highly nonlinear fiber with high multicast efficiency
Guo-Wei Lu1, Kazi Sarwar Abedin, Tetsuya Miyazaki
1National Institute of Information and Communications Technology, 4-1-1, Nukui-Kitamachi, Koganei, Tokyo 184-8795, Japan. gwlu@nict.go.jp
Optics Express
|December 24, 2008
Summary
This study demonstrates a highly efficient optical multicast system using phase-preserved differential phase-shifted keying (DPSK) signals. The novel approach significantly enhances multicast efficiency by transmitting phase information across multiple wavelengths.
Area of Science:
- Optical Communications
- Nonlinear Optics
- Fiber Optics
Background:
- Optical layer multicast is crucial for efficient data transmission.
- Existing multicast schemes face challenges in efficiency and phase preservation.
- Four-wave mixing (FWM) is a key nonlinear optical process for wavelength conversion.
Purpose of the Study:
- To address the multicast efficiency issue in optical layer multicast.
- To experimentally demonstrate a 1-to-8 phase-preserved differential phase-shifted keying (DPSK) wavelength multicast.
- To improve multicast efficiency by preserving phase information across multiple wavelengths.
Main Methods:
- Utilizing four-wave mixing (FWM) in a Bismuth highly nonlinear fiber (Bi-HNLF).
- Implementing a 1-to-8 phase-preserved DPSK wavelength multicast.
- Employing only three pump lasers for the wavelength multicast process.
Main Results:
- Successful experimental demonstration of a 1-to-8 DPSK wavelength multicast.
- DPSK signal delivery from one wavelength to eight different wavelengths.
- Significant improvement in multicast efficiency compared to existing schemes.
Conclusions:
- The proposed method greatly improves multicast efficiency.
- Delivering phase information to more destination wavelengths is key to enhanced efficiency.
- This technique offers a promising solution for efficient optical multicast systems.
