In this paper, we proposed a novel method of joint phase noise estimate (JPNE) for PDM-M-QAM (M = 4, 16, 32, 64, …) transmission systems, and established the theoretical model to illustrate the operation mechanism. T...In this paper, we proposed a novel method of joint phase noise estimate (JPNE) for PDM-M-QAM (M = 4, 16, 32, 64, …) transmission systems, and established the theoretical model to illustrate the operation mechanism. The simulation of laser phase noise and fiber nonlinearity compensation based on the proposed JPNE method had also been demonstrated. For 112 Gb/s PDM-4QAM transmission system, the simulation results had showed that the optimum launch power increased from -4 dBm to at least 0 dBm compared with the condition of no phase noise compensation in reach of all simulation distances.展开更多
We proposed an optical 4-ary frequency shift keying （FSK） modulation scheme applying dual-parallel Mach-Zehnder （MZ） modulator. The 4-ary FSK based on the single-side-band modulation scheme can greatly lower the t...We proposed an optical 4-ary frequency shift keying （FSK） modulation scheme applying dual-parallel Mach-Zehnder （MZ） modulator. The 4-ary FSK based on the single-side-band modulation scheme can greatly lower the transmission speed in each sub-carriers and increase the transmission performance, comparing with the 2-FSK signal. The transmission performance of the 4-ary FSK was demonstrated after a 50 km single mode fiber. The results showed that the 4-ary FSK can realize error-free transmission. Moreover, we analyzed the influence of factors （such as disperse compensation and demodulation bandwidth） on the transmission performance in this paper. The analysis of the influenced factors can provide a theoretical basic for experiment.展开更多
This paper proposed and investigated a novel frequency shift keying （FSK） modulation based on two fiber Bragg gratings （FBGs） and two intensity modulators. Then the transmission of 10 Gbit/s FSK signal after a 50 ...This paper proposed and investigated a novel frequency shift keying （FSK） modulation based on two fiber Bragg gratings （FBGs） and two intensity modulators. Then the transmission of 10 Gbit/s FSK signal after a 50 km single mode fiber （SMF） was studied in this paper. The power penalty at the bit error rate （BER） of 10-9 was below 0.1 dB. The FSK modulation system can be applied to optical transmission system展开更多
文摘In this paper, we proposed a novel method of joint phase noise estimate (JPNE) for PDM-M-QAM (M = 4, 16, 32, 64, …) transmission systems, and established the theoretical model to illustrate the operation mechanism. The simulation of laser phase noise and fiber nonlinearity compensation based on the proposed JPNE method had also been demonstrated. For 112 Gb/s PDM-4QAM transmission system, the simulation results had showed that the optimum launch power increased from -4 dBm to at least 0 dBm compared with the condition of no phase noise compensation in reach of all simulation distances.
基金This work was supported by the National Natural Science Foundation of China （Grant Nos. 61471179 and 61301226）, and the High Technology Research and Development Program of China （No. 2015AA016904）.
文摘We proposed an optical 4-ary frequency shift keying （FSK） modulation scheme applying dual-parallel Mach-Zehnder （MZ） modulator. The 4-ary FSK based on the single-side-band modulation scheme can greatly lower the transmission speed in each sub-carriers and increase the transmission performance, comparing with the 2-FSK signal. The transmission performance of the 4-ary FSK was demonstrated after a 50 km single mode fiber. The results showed that the 4-ary FSK can realize error-free transmission. Moreover, we analyzed the influence of factors （such as disperse compensation and demodulation bandwidth） on the transmission performance in this paper. The analysis of the influenced factors can provide a theoretical basic for experiment.
文摘This paper proposed and investigated a novel frequency shift keying （FSK） modulation based on two fiber Bragg gratings （FBGs） and two intensity modulators. Then the transmission of 10 Gbit/s FSK signal after a 50 km single mode fiber （SMF） was studied in this paper. The power penalty at the bit error rate （BER） of 10-9 was below 0.1 dB. The FSK modulation system can be applied to optical transmission system
