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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.

No MeSH data available.


Related in: MedlinePlus

Experimental Setup of all-optical polarization multiplexed Nyquist signal generation, fiber transmission and full-band signal coherent detection.(RF: radio frequency; PS: phase shifter; DAC: digital-analog-convertor, working at 25-GHz clock; EA: electrical amplifier; ECL: external cavity laser; MZM: Mach–Zehnder modulator; I/Q Mod.: In-phase and quadrature modulator; PM-TOF: polarization-maintaining tunable optical filter; PM-OC: polarization-maintaining optical coupler; T1, T4: tunable optical delay-line consists of fixed fiber jumper and manually tunable optical time delay; ATT: tunable attenuator; PBC: polarization beam combiner; SSFM: stand single-mode fiber; S: switch; WSS: wavelength selective switch; EDFA: erbium doped fiber amplifier; LO: local oscillator).
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f2: Experimental Setup of all-optical polarization multiplexed Nyquist signal generation, fiber transmission and full-band signal coherent detection.(RF: radio frequency; PS: phase shifter; DAC: digital-analog-convertor, working at 25-GHz clock; EA: electrical amplifier; ECL: external cavity laser; MZM: Mach–Zehnder modulator; I/Q Mod.: In-phase and quadrature modulator; PM-TOF: polarization-maintaining tunable optical filter; PM-OC: polarization-maintaining optical coupler; T1, T4: tunable optical delay-line consists of fixed fiber jumper and manually tunable optical time delay; ATT: tunable attenuator; PBC: polarization beam combiner; SSFM: stand single-mode fiber; S: switch; WSS: wavelength selective switch; EDFA: erbium doped fiber amplifier; LO: local oscillator).

Mentions: As a proof of concept, Fig. 2 shows the experiment setup of PDM all-optical Nyquist signal generation based on Sinc-shaped Nyquist pulse, fiber transmission and full-band coherent detection. As proposed and demonstrated in15, this kind of Sinc-shaped pulse source can be realized by the cascaded Mach–Zehnder modulators (MZM) driven by the radio frequency (RF) signals, of which the RF driving voltage and direct-current (DC) bias are properly chosen. Similar experiment setup with transmitter and coherent receiver can be found in our previous work16. One external cavity laser (ECL) is used as the light source at 1549.50 nm, linewidth less than 100 kHz and output power of 14.5 dBm. The frequency-locked optical comb with 12.5 and 25-GHz carrier spacing is generated by a MZM driven by the RF source at 12.5 and 25 GHz, respectively. One electrical amplifier (EA) is used to boost the amplitude of the RF signal. In our case, we choose the driving voltage at about 2Vpi and the DC bias at about 0.52Vpi and Vpi is half-wave voltage of the modulator16. One polarization-maintaining tunable optical filter (PM-TOF) is used to choose the comb tones. Using different frequency RF sources and different bandwidth PM-TOF, we can generate different combs with different carrier spacing and different Nyquist pulses with different repeating period.


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)

Experimental Setup of all-optical polarization multiplexed Nyquist signal generation, fiber transmission and full-band signal coherent detection.(RF: radio frequency; PS: phase shifter; DAC: digital-analog-convertor, working at 25-GHz clock; EA: electrical amplifier; ECL: external cavity laser; MZM: Mach–Zehnder modulator; I/Q Mod.: In-phase and quadrature modulator; PM-TOF: polarization-maintaining tunable optical filter; PM-OC: polarization-maintaining optical coupler; T1, T4: tunable optical delay-line consists of fixed fiber jumper and manually tunable optical time delay; ATT: tunable attenuator; PBC: polarization beam combiner; SSFM: stand single-mode fiber; S: switch; WSS: wavelength selective switch; EDFA: erbium doped fiber amplifier; LO: local oscillator).
© Copyright Policy - open-access
Related In: Results  -  Collection

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

f2: Experimental Setup of all-optical polarization multiplexed Nyquist signal generation, fiber transmission and full-band signal coherent detection.(RF: radio frequency; PS: phase shifter; DAC: digital-analog-convertor, working at 25-GHz clock; EA: electrical amplifier; ECL: external cavity laser; MZM: Mach–Zehnder modulator; I/Q Mod.: In-phase and quadrature modulator; PM-TOF: polarization-maintaining tunable optical filter; PM-OC: polarization-maintaining optical coupler; T1, T4: tunable optical delay-line consists of fixed fiber jumper and manually tunable optical time delay; ATT: tunable attenuator; PBC: polarization beam combiner; SSFM: stand single-mode fiber; S: switch; WSS: wavelength selective switch; EDFA: erbium doped fiber amplifier; LO: local oscillator).
Mentions: As a proof of concept, Fig. 2 shows the experiment setup of PDM all-optical Nyquist signal generation based on Sinc-shaped Nyquist pulse, fiber transmission and full-band coherent detection. As proposed and demonstrated in15, this kind of Sinc-shaped pulse source can be realized by the cascaded Mach–Zehnder modulators (MZM) driven by the radio frequency (RF) signals, of which the RF driving voltage and direct-current (DC) bias are properly chosen. Similar experiment setup with transmitter and coherent receiver can be found in our previous work16. One external cavity laser (ECL) is used as the light source at 1549.50 nm, linewidth less than 100 kHz and output power of 14.5 dBm. The frequency-locked optical comb with 12.5 and 25-GHz carrier spacing is generated by a MZM driven by the RF source at 12.5 and 25 GHz, respectively. One electrical amplifier (EA) is used to boost the amplitude of the RF signal. In our case, we choose the driving voltage at about 2Vpi and the DC bias at about 0.52Vpi and Vpi is half-wave voltage of the modulator16. One polarization-maintaining tunable optical filter (PM-TOF) is used to choose the comb tones. Using different frequency RF sources and different bandwidth PM-TOF, we can generate different combs with different carrier spacing and different Nyquist pulses with different repeating period.

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