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Upstream power equalization in a gigabit passive optical network
Chien-Hung Yeh1, Dar-Zu Hsu, Sien Chi
1Information and Communications Research Laboratories, Industrial Technology Research Institute, Chutung, Hsinchu 310-40, Taiwan. depew@itri.org.tw
Optics Express
|June 18, 2009
Summary
We developed a simple power equalizer for gigabit passive optical networks (G-PON). This technique effectively equalizes upstream traffic power, achieving a wide dynamic range with minimal variation.
Area of Science:
- Optical Networking
- Telecommunications Engineering
Background:
- Gigabit Passive Optical Networks (G-PON) are crucial for high-speed internet access.
- Variations in upstream optical power can degrade network performance and reliability.
Purpose of the Study:
- To propose and demonstrate a novel technique for equalizing upstream traffic power in G-PON systems.
- To reduce power variations and improve the stability of upstream signals.
Main Methods:
- A simple power equalizer utilizing a Fabry-Perot laser diode (FP-LD) was designed and implemented.
- Experimental validation was conducted to assess the equalizer's effectiveness.
Main Results:
- The proposed scheme successfully equalized different upstream optical powers.
- A dynamic upstream power range of 20 dB (from -5 to -25 dBm) was achieved.
- Maximal power variation was limited to 1.7 dB, demonstrating significant equalization.
Conclusions:
- The developed FP-LD based power equalizer offers an effective solution for upstream power equalization in G-PON.
- The technique enhances network stability and performance by mitigating power fluctuations.
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