10 Gb/s full-duplex bidirectional transmission with RSOA-based ONU using detuned optical filtering and decision...

Area of Science:

• Optical Communications
• Telecommunications Engineering

Background:

• Passive Optical Networks (PONs) are crucial for broadband access.
• Wavelength Division Multiplexing (WDM) enhances PON capacity.
• Extending transmission distance in WDM-PONs is an ongoing challenge.

Purpose of the Study:

• To demonstrate full-duplex bidirectional transmission at 10 Gb/s for extended reach WDM-PON.
• To evaluate the performance of a reflective semiconductor optical amplifier (RSOA) based system.
• To analyze the impact of chromatic dispersion and Rayleigh backscattering.

Main Methods:

• Utilized a low-bandwidth reflective semiconductor optical amplifier (RSOA) for signal re-modulation at the optical network unit (ONU).
• Implemented optimum offset filtering at the optical line terminal (OLT) receiver.
• Employed decision-feedback equalization (DFE) to improve system performance.
• Investigated transmission over standard single mode fiber (SSMF) up to 25 km.

Main Results:

• Achieved full-duplex bidirectional transmission at 10 Gb/s over 25 km of SSMF.
• Demonstrated the effectiveness of RSOA for signal re-modulation in extended-reach WDM-PON.
• Showcased performance improvements with offset filtering and DFE.
• Analyzed the influence of chromatic dispersion and Rayleigh backscattering on the system.

Conclusions:

• The proposed system enables extended transmission distances for WDM-PON applications.
• RSOA-based ONU with advanced signal processing is viable for high-speed, long-reach optical networks.
• The findings contribute to the development of cost-effective and high-performance optical access networks.