In this work we study all-optical multi-channel return-to-zero （RZ）-on-off keying （OOK） to nonreturn-to-zero （NRZ）-OOK format conversion in single uniform fiber Bragg grating （FBG） for mixed line-rate dense wa...In this work we study all-optical multi-channel return-to-zero （RZ）-on-off keying （OOK） to nonreturn-to-zero （NRZ）-OOK format conversion in single uniform fiber Bragg grating （FBG） for mixed line-rate dense wave- length-division multiplexing systems using mathematical simulations. Forty and 20 Gbit/s RZ-OOK signals with 33% and 50% duty cycles are converted to NRZ-OOK signals in single uniform FBG with 21~ reflectivity. Impact of amplitude noise from FBG contrast profile on modulation format conversion efficiency is also studied.展开更多
Most reverse conversions in Residue Number Systems (RNS) are based on the Chinese Remainder Theorem (CRT) and the Mixed Radix Conversion (MRC). The complexity of the circuitry of the CRT is high due to the large modul...Most reverse conversions in Residue Number Systems (RNS) are based on the Chinese Remainder Theorem (CRT) and the Mixed Radix Conversion (MRC). The complexity of the circuitry of the CRT is high due to the large modulo-M operation. The MRC has a simple circuitry but it’s a sequential process in nature. The purpose of this research is to obtain an efficient reverse conversion method to reduce the computational overhead found in the conventional reverse conversion algorithms. In this paper, new algorithms for reverse conversion in RNS for four-moduli set and five-moduli set have been proposed and their correctness evaluated. Numerical evaluations to ascertain the correctness and simplicity of the algorithm have been presented. These algorithms have fewer multiplicative index operations than those in the conventional CRT and MRC. The large modulo-M operation has been eliminated which reduces the computational overhead.展开更多
We systemically investigate the interchannel four-wave mixing (FWM) in dispersion-managed WDM systems with arbitrary launch position. We optimize the number of fiber sections, and the dispersion ratio for the system p...We systemically investigate the interchannel four-wave mixing (FWM) in dispersion-managed WDM systems with arbitrary launch position. We optimize the number of fiber sections, and the dispersion ratio for the system performance.展开更多
基金supported by the European Social Fund within the Project No.2013/0012/1DP/1.1.1.2.0/13/APIA/VIAA/051
文摘In this work we study all-optical multi-channel return-to-zero （RZ）-on-off keying （OOK） to nonreturn-to-zero （NRZ）-OOK format conversion in single uniform fiber Bragg grating （FBG） for mixed line-rate dense wave- length-division multiplexing systems using mathematical simulations. Forty and 20 Gbit/s RZ-OOK signals with 33% and 50% duty cycles are converted to NRZ-OOK signals in single uniform FBG with 21~ reflectivity. Impact of amplitude noise from FBG contrast profile on modulation format conversion efficiency is also studied.
文摘Most reverse conversions in Residue Number Systems (RNS) are based on the Chinese Remainder Theorem (CRT) and the Mixed Radix Conversion (MRC). The complexity of the circuitry of the CRT is high due to the large modulo-M operation. The MRC has a simple circuitry but it’s a sequential process in nature. The purpose of this research is to obtain an efficient reverse conversion method to reduce the computational overhead found in the conventional reverse conversion algorithms. In this paper, new algorithms for reverse conversion in RNS for four-moduli set and five-moduli set have been proposed and their correctness evaluated. Numerical evaluations to ascertain the correctness and simplicity of the algorithm have been presented. These algorithms have fewer multiplicative index operations than those in the conventional CRT and MRC. The large modulo-M operation has been eliminated which reduces the computational overhead.
文摘We systemically investigate the interchannel four-wave mixing (FWM) in dispersion-managed WDM systems with arbitrary launch position. We optimize the number of fiber sections, and the dispersion ratio for the system performance.
