26 October 2009 Multi-channel all-optical format conversions from RZ signals with different duty-cycle to NRZ signals
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Abstract
We propose and theoretically demonstrate multi-channel all-optical non-return-to-zero (NRZ) format to return-to-zero (RZ) format conversions for wavelength division multiplexing (WDM) network. By using two fiber based delay interferometers (DIs) with free spectral range (FSR) of 20GHz and 40GHz, 8*10Gb/s (200GHz spacing on ITU grid) RZ signals can be converted to corresponding NRZ signals with small penalty. The principle and simulation are analyzed in both time and frequency domains. Format conversions are demonstrated for multi-channel RZ signals with duty cycle of 33%, 50% and 66% respectively. Q factors before and after the multi-channel RZ-to-NRZ conversions show a good performance and thus the practicability of the proposed format converter.
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Yu Yu, Xinliang Zhang, Cheng Cheng, Dexiu Huang, "Multi-channel all-optical format conversions from RZ signals with different duty-cycle to NRZ signals", Proc. SPIE 7516, Photonics and Optoelectronics Meetings (POEM) 2009: Optoelectronic Devices and Integration, 75160X (26 October 2009); doi: 10.1117/12.840746; https://doi.org/10.1117/12.840746
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