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Enhanced 40 and 80 Gb/s wavelength conversion using a rectangular shaped optical filter for both red and blue
O Raz1, J Herrera, H J S Dorren
1COBRA Research Institute, Eindhoven University of Technology Den Dolech 2 - 5600MB, Eindhoven, The Netherlands. o.raz@tue.nl
Optics Express
|February 4, 2009
Summary
This study demonstrates improved all-optical wavelength conversion using a tunable filter and spectral slicing. Enhanced performance at 40 Gb/s and 80 Gb/s shows significant penalty reduction and minimal eye broadening.
Area of Science:
- Photonics and Optical Communications
- Semiconductor Devices
- Signal Processing
Background:
- All-optical wavelength conversion is crucial for high-speed optical networks.
- Cross Gain Modulation (XGM) and Cross Phase Modulation (XPM) in Semiconductor Optical Amplifiers (SOAs) are key effects.
- Spectral slicing with tunable filters is a method for wavelength conversion.
Purpose of the Study:
- To improve all-optical wavelength conversion performance using a novel tunable filter.
- To investigate the impact of filter characteristics on conversion efficiency and signal quality.
- To present quantitative results for both blue and red spectral slicing.
Main Methods:
- Utilized a tunable filter with adjustable bandwidth and wavelength, featuring a sharp roll-off.
- Employed spectral slicing of Semiconductor Optical Amplifier (SOA) outputs.
- Performed experiments at 40 Gb/s and 80 Gb/s data rates.
- Conducted numerical simulations to analyze filter parameter effects.
Main Results:
- Achieved a low penalty of 0.7 dB at 40 Gb/s with blue spectral slicing and minimal eye broadening.
- Demonstrated a significant improvement with a 0.5 dB penalty at 80 Gb/s.
- Reported a 0.5 dB penalty for red spectral slicing at 40 Gb/s with a narrower time response.
- Simulations confirmed that sharp filter roll-off and broad passband are critical for eye opening.
Conclusions:
- The proposed tunable filter significantly enhances all-optical wavelength conversion.
- Spectral slicing, particularly with optimized filter parameters, offers a viable solution for high-speed wavelength conversion.
- The findings provide valuable insights for designing advanced optical communication systems.
