Chinese Optics Letters, 2010, 8 (9): 859, Published Online: Oct. 18, 2010
Simultaneous multichannel NRZ-to-RZ format conversion of 4-ASK signal based on phase-intensity hybrid modulation and dispersion compensation fiber
060.2330 Fiber optics communications 070.4340 Nonlinear optical signal processing 230.0250 Optoelectronics
Abstract
We propose and investigate a novel technique to realize non-return-to-zero (NRZ) to return-to-zero (RZ) format conversion of a multichannel 4-ary amplitude shift keying (4-ASK) signal. The proposed format converter composed of two modulators and a dispersion compensating fiber (DCF) is theoretically investigated using numerical simulation as basis. Research shows that a 4-channel 20-Gb/s NRZ-4-ASK signal can be converted to a RZ-4-ASK signal simultaneously without wavelength shifting and signal quality degradation, with the converted signal multiplexed to 40 Gb/s.
Wenke Yu, Caiyun Lou, Xiaofan Zhao, Dan Lu. Simultaneous multichannel NRZ-to-RZ format conversion of 4-ASK signal based on phase-intensity hybrid modulation and dispersion compensation fiber[J]. Chinese Optics Letters, 2010, 8(9): 859.