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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 experiment setup of 1-Tb/s all-optical Nyquist PDM-16QAM(125 GBaud) generation.Insets (b) are the 5 × 25-GHz comb, (c–f) are the eye-diagrams measured in 10 ps/div. (c) is the Sinc-shaped pulse before modulation, (d) is the four level signal generated by DAC, (e) is the Sinc-shaped pulse after modulation and (f) is the TDM signal of 125-GBaud 16QAM signals. (h) is the optical spectrum of signals after modulation. All the optical spectra are measured in 0.02 nm resolution.
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f9: The experiment setup of 1-Tb/s all-optical Nyquist PDM-16QAM(125 GBaud) generation.Insets (b) are the 5 × 25-GHz comb, (c–f) are the eye-diagrams measured in 10 ps/div. (c) is the Sinc-shaped pulse before modulation, (d) is the four level signal generated by DAC, (e) is the Sinc-shaped pulse after modulation and (f) is the TDM signal of 125-GBaud 16QAM signals. (h) is the optical spectrum of signals after modulation. All the optical spectra are measured in 0.02 nm resolution.

Mentions: We have also experimentally demonstrated 1-Tb/s single-carrier all-optical Nyquist PDM-16QAM (125 GBaud) signal generation and full-band single-receiver coherent detection, which shows the advantage and feasibility of the single-carrier all-optical Nyquist signal. The transmitter setup of the 1-Tb/s all-optical Nyquist PDM-16QAM (125 GBaud) signal generation and full-band signal coherent detection is shown in Fig. 9(a), which is similar to that in Fig. 2. Inset (b) shows the 25-GHz carrier-spacing comb after the band-pass filter with peak power fluctuation less than 0.3 dB. After the PM-TOF, as shown in Fig. 9(c), the periodic sinc-shaped Nyquist pulses of 5 × 25-GHz combs are clearly obtained. The major difference is that the 25-GBaud 16QAM signals are generated by a commercial DAC at 64 GSa/s, the eye-diagram of the 4-level data signals is shown in (d). The clock of the DAC is synchronized with the RF driving signal for pulse generation. The periodic sinc-shaped pulse after the 25-GBaud 16QAM modulation is shown in Fig. 9(e). Finally, Fig. 9(f) shows the clear eye-diagram of the 125-GBaud orth-OTDM all-optical Nyquist 16QAM signal, and Fig. 9(g) shows the optical spectrum of 125-GBaud Nyquist16QAM signals.


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 experiment setup of 1-Tb/s all-optical Nyquist PDM-16QAM(125 GBaud) generation.Insets (b) are the 5 × 25-GHz comb, (c–f) are the eye-diagrams measured in 10 ps/div. (c) is the Sinc-shaped pulse before modulation, (d) is the four level signal generated by DAC, (e) is the Sinc-shaped pulse after modulation and (f) is the TDM signal of 125-GBaud 16QAM signals. (h) is the optical spectrum of signals after modulation. All the optical spectra are measured in 0.02 nm resolution.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

f9: The experiment setup of 1-Tb/s all-optical Nyquist PDM-16QAM(125 GBaud) generation.Insets (b) are the 5 × 25-GHz comb, (c–f) are the eye-diagrams measured in 10 ps/div. (c) is the Sinc-shaped pulse before modulation, (d) is the four level signal generated by DAC, (e) is the Sinc-shaped pulse after modulation and (f) is the TDM signal of 125-GBaud 16QAM signals. (h) is the optical spectrum of signals after modulation. All the optical spectra are measured in 0.02 nm resolution.
Mentions: We have also experimentally demonstrated 1-Tb/s single-carrier all-optical Nyquist PDM-16QAM (125 GBaud) signal generation and full-band single-receiver coherent detection, which shows the advantage and feasibility of the single-carrier all-optical Nyquist signal. The transmitter setup of the 1-Tb/s all-optical Nyquist PDM-16QAM (125 GBaud) signal generation and full-band signal coherent detection is shown in Fig. 9(a), which is similar to that in Fig. 2. Inset (b) shows the 25-GHz carrier-spacing comb after the band-pass filter with peak power fluctuation less than 0.3 dB. After the PM-TOF, as shown in Fig. 9(c), the periodic sinc-shaped Nyquist pulses of 5 × 25-GHz combs are clearly obtained. The major difference is that the 25-GBaud 16QAM signals are generated by a commercial DAC at 64 GSa/s, the eye-diagram of the 4-level data signals is shown in (d). The clock of the DAC is synchronized with the RF driving signal for pulse generation. The periodic sinc-shaped pulse after the 25-GBaud 16QAM modulation is shown in Fig. 9(e). Finally, Fig. 9(f) shows the clear eye-diagram of the 125-GBaud orth-OTDM all-optical Nyquist 16QAM signal, and Fig. 9(g) shows the optical spectrum of 125-GBaud Nyquist16QAM signals.

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