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Transmission and full-band coherent detection of polarization-multiplexed all-optical Nyquist signals generated by Sinc-shaped Nyquist pulses.

Zhang J, Yu J, Chi N - Sci Rep (2015)

Bottom Line: All optical method is considered as a promising technique for high symbol rate Nyquist signal generation, which has attracted a lot of research interests for high spectral-efficiency and high-capacity optical communication system.In this paper, we extend our previous work and report the fully experimental demonstration of polarization-division multiplexed (PDM) all-optical Nyquist signal generation based on Sinc-shaped Nyquist pulse with advanced modulation formats, fiber-transmission and single-receiver full-band coherent detection.Using this scheme, we have successfully demonstrated the generation, fiber transmission and single-receiver full-band coherent detection of all-optical Nyquist PDM-QPSK and PDM-16QAM signals up to 125-GBaud. 1-Tb/s single-carrier PDM-16QAM signal generation and full-band coherent detection is realized, which shows the advantage and feasibility of the single-carrier all-optical Nyquist signals.

View Article: PubMed Central - PubMed

Affiliation: Department of Communication Science and Engineering, and Key Laboratory for Information Science of Electromagnetic Waves (MoE), Fudan University, 220 Handan Road, Shanghai 200433, China.

ABSTRACT
All optical method is considered as a promising technique for high symbol rate Nyquist signal generation, which has attracted a lot of research interests for high spectral-efficiency and high-capacity optical communication system. In this paper, we extend our previous work and report the fully experimental demonstration of polarization-division multiplexed (PDM) all-optical Nyquist signal generation based on Sinc-shaped Nyquist pulse with advanced modulation formats, fiber-transmission and single-receiver full-band coherent detection. Using this scheme, we have successfully demonstrated the generation, fiber transmission and single-receiver full-band coherent detection of all-optical Nyquist PDM-QPSK and PDM-16QAM signals up to 125-GBaud. 1-Tb/s single-carrier PDM-16QAM signal generation and full-band coherent detection is realized, which shows the advantage and feasibility of the single-carrier all-optical Nyquist signals.

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The basic concept and principle.(a) The time-frequency correspondence for sinc-shaped Nyquist pulses and the modulated Nyquist signals; (b) The principle of polarization-multiplexed all-optical Nyquist signal generation, modulation, multiplexing, fiber transmission and full-band coherent detection.
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f1: The basic concept and principle.(a) The time-frequency correspondence for sinc-shaped Nyquist pulses and the modulated Nyquist signals; (b) The principle of polarization-multiplexed all-optical Nyquist signal generation, modulation, multiplexing, fiber transmission and full-band coherent detection.

Mentions: Figure 1(a) shows the basic concept of the time-frequency correspondence of the Sinc-shaped Nyquist pulses and the modulated Nyquist signals, and Fig. 1(b) shows the principle of PDM all-optical Nyquist signal generation, modulation, multiplexing and digital full-band coherent detection. As shown in Fig. 1(a), the spectrum of a single Sinc pluse is rectangular in frequency domain, while the spectrum of a Sinc-shaped pulse sequence is a frequency-locked comb with equal amplitude and the phases of the all frequency components are locked showing a linear dependence on frequency. As analyzed in1516, a promising way of Nyquist signal generation is based on these combs and orthogonal optical time-division multiplexing (orth-OTDM)9. Figure 1 shows an N-tone frequency-locked comb with central frequency f0, carrier frequency-spacing of Δf. The pulse repetition period is represented as T = 1/Δf. For an N tone frequency-locked comb with equal phase and amplitude, the time domain optical signal is a periodic Sinc-shaped Nyquist pulse with period of T. Therefore, instead of shaping the Sinc pulses, the target is to generate a frequency-locked optical comb with equal amplitude and linear-locked phase.


Transmission and full-band coherent detection of polarization-multiplexed all-optical Nyquist signals generated by Sinc-shaped Nyquist pulses.

Zhang J, Yu J, Chi N - Sci Rep (2015)

The basic concept and principle.(a) The time-frequency correspondence for sinc-shaped Nyquist pulses and the modulated Nyquist signals; (b) The principle of polarization-multiplexed all-optical Nyquist signal generation, modulation, multiplexing, fiber transmission and full-band coherent detection.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4555172&req=5

f1: The basic concept and principle.(a) The time-frequency correspondence for sinc-shaped Nyquist pulses and the modulated Nyquist signals; (b) The principle of polarization-multiplexed all-optical Nyquist signal generation, modulation, multiplexing, fiber transmission and full-band coherent detection.
Mentions: Figure 1(a) shows the basic concept of the time-frequency correspondence of the Sinc-shaped Nyquist pulses and the modulated Nyquist signals, and Fig. 1(b) shows the principle of PDM all-optical Nyquist signal generation, modulation, multiplexing and digital full-band coherent detection. As shown in Fig. 1(a), the spectrum of a single Sinc pluse is rectangular in frequency domain, while the spectrum of a Sinc-shaped pulse sequence is a frequency-locked comb with equal amplitude and the phases of the all frequency components are locked showing a linear dependence on frequency. As analyzed in1516, a promising way of Nyquist signal generation is based on these combs and orthogonal optical time-division multiplexing (orth-OTDM)9. Figure 1 shows an N-tone frequency-locked comb with central frequency f0, carrier frequency-spacing of Δf. The pulse repetition period is represented as T = 1/Δf. For an N tone frequency-locked comb with equal phase and amplitude, the time domain optical signal is a periodic Sinc-shaped Nyquist pulse with period of T. Therefore, instead of shaping the Sinc pulses, the target is to generate a frequency-locked optical comb with equal amplitude and linear-locked phase.

Bottom Line: All optical method is considered as a promising technique for high symbol rate Nyquist signal generation, which has attracted a lot of research interests for high spectral-efficiency and high-capacity optical communication system.In this paper, we extend our previous work and report the fully experimental demonstration of polarization-division multiplexed (PDM) all-optical Nyquist signal generation based on Sinc-shaped Nyquist pulse with advanced modulation formats, fiber-transmission and single-receiver full-band coherent detection.Using this scheme, we have successfully demonstrated the generation, fiber transmission and single-receiver full-band coherent detection of all-optical Nyquist PDM-QPSK and PDM-16QAM signals up to 125-GBaud. 1-Tb/s single-carrier PDM-16QAM signal generation and full-band coherent detection is realized, which shows the advantage and feasibility of the single-carrier all-optical Nyquist signals.

View Article: PubMed Central - PubMed

Affiliation: Department of Communication Science and Engineering, and Key Laboratory for Information Science of Electromagnetic Waves (MoE), Fudan University, 220 Handan Road, Shanghai 200433, China.

ABSTRACT
All optical method is considered as a promising technique for high symbol rate Nyquist signal generation, which has attracted a lot of research interests for high spectral-efficiency and high-capacity optical communication system. In this paper, we extend our previous work and report the fully experimental demonstration of polarization-division multiplexed (PDM) all-optical Nyquist signal generation based on Sinc-shaped Nyquist pulse with advanced modulation formats, fiber-transmission and single-receiver full-band coherent detection. Using this scheme, we have successfully demonstrated the generation, fiber transmission and single-receiver full-band coherent detection of all-optical Nyquist PDM-QPSK and PDM-16QAM signals up to 125-GBaud. 1-Tb/s single-carrier PDM-16QAM signal generation and full-band coherent detection is realized, which shows the advantage and feasibility of the single-carrier all-optical Nyquist signals.

No MeSH data available.


Related in: MedlinePlus