In Elastic Optical Networks(EONs)with flexible bandwidth allocation,the blocking probability is high because of spectral contention.Similar to the functionality of wavelength conversion in Wavelength-Division-Multiple...In Elastic Optical Networks(EONs)with flexible bandwidth allocation,the blocking probability is high because of spectral contention.Similar to the functionality of wavelength conversion in Wavelength-Division-Multiplexing(WDM)networks,waveband conversion has been proposed to solve spectral contention in EONs.In this paper,we discuss the design of node architectures for an EON with waveband conversion.Four node architectures with shared Tuneable Waveband Converters(TWBCs)are proposed,and their blocking performances are evaluated by simulation.Simulation results show that the blocking probability of a node is significantly improved by waveband conversion.The sharing efficiency of waveband converters is also investigated.Simulation results show that at the same blocking rate,the node architecture with converters shared per node can save more than 20% waveband converters compared with that of the one with converters shared per link.展开更多
We demonstrate a 10. 7Gb/s-line-rate L-band wavelength-division-multiplexer （WDM） loop transmission over a 1890-kin standard single-mode fibre （SSMF） with a 100-km amplifier spacing as well as non-return-to-zero ...We demonstrate a 10. 7Gb/s-line-rate L-band wavelength-division-multiplexer （WDM） loop transmission over a 1890-kin standard single-mode fibre （SSMF） with a 100-km amplifier spacing as well as non-return-to-zero （NRZ） format. The dispersion compensating fibre （DCF） plus chirped tibre Bragg grating （CFBG） is employed for hybrid inline dispersion compensation. The power penalty of each channel is less than 3 dB after three-loop transmission. The experimental results show that high-performance CFBGs can be successfully used in ultra-long haul （〉 1000km） WDM systems. We also point out that the all-CFBG compensation scheme is not suitable for re-circulating loop transmissions.展开更多
Schemes integrating inter-carrier interference （ICI） self-cancellation and common phase error （CPE） com- pensation for coherent optical orthogonal frequency division multiplexing （CO-OFDM） systems are investi- g...Schemes integrating inter-carrier interference （ICI） self-cancellation and common phase error （CPE） com- pensation for coherent optical orthogonal frequency division multiplexing （CO-OFDM） systems are investi- gated. The purpose of our research is to counteract the impacts of laser phase noise and fiber nonlinearity. We propose two ICI self-cancellation-based CO-OFDM schemes, and adopt a pilot-aided decision feedback （DFB） loop for CPE compensation. The proposed schemes are compared with conventional CO-OFDM schemes at the same spectral efficiency. Simulations show that our schemes can not only enhance laser linewidth tolerance of the CO-OFDM system, but also present strong robustness against fiber nonlinearity.展开更多
Orthogonal frequency division multiplexing-passive optical network （OFDM-PON） and single-carrier fre- quency division multiplexing （SCFDM）-PON are promising solutions for future high-speed PON-based access. A pola...Orthogonal frequency division multiplexing-passive optical network （OFDM-PON） and single-carrier fre- quency division multiplexing （SCFDM）-PON are promising solutions for future high-speed PON-based access. A polarization division multiplexing scheme with direct detection is proposed for OFDM-PON to effectively reduce bandwidth requirements for components. However, the scheme strictly requires spec- trum overlapping of two orthogonal sidebands and the 4 × 4 multi-input-multi-output （MIMO） algorithm to eliminate complex cross-polarization interference. In this letter, we propose a polarization interleaving （PI） approach that significantly reduces bandwidth requirements for optical and electrical components while achieving a high-flexibility and low-complexity MIMO algorithm. Downstream single sideband PI-SCFDM transmission is experimentally demonstrated.展开更多
We demonstrate the long distance transmission of single-carrier frequency division multiple address sig- nals by directly-modulated optically injection-locked vertical-cavity surface-emitting laser. Transmission dista...We demonstrate the long distance transmission of single-carrier frequency division multiple address sig- nals by directly-modulated optically injection-locked vertical-cavity surface-emitting laser. Transmission distance as long as 50 km is achieved at 5 Cb/s （2.5 Gb/s for each user） through data pattern inversion and higher frequency response gain under optical injection locking.展开更多
基金The National Key Basic Research and Development Program of China(Nos.2010CB328201,2010CB328202)the National Natural Science Foundation of China(Nos.60907030,60736003,61205058)+1 种基金the National High Technology Research and Development Program of China(No.2011AA01A106)the Open Fund of State Key Laboratory of Information Photonics and Optical Communications(Beijing University of Posts and Telecommunications)
基金supported by the National Key Basic Research Program of China (973 Program) under Grants No. 2010CB328201,No.2010CB328202the National Natural Science Foundation of China under Grants No. 60907030,No. 61275071,No. 60736003,No. 60931160439the National High Technical Research and Development Program of China (863 Program)under Grant No. 2011AA01A106
文摘In Elastic Optical Networks(EONs)with flexible bandwidth allocation,the blocking probability is high because of spectral contention.Similar to the functionality of wavelength conversion in Wavelength-Division-Multiplexing(WDM)networks,waveband conversion has been proposed to solve spectral contention in EONs.In this paper,we discuss the design of node architectures for an EON with waveband conversion.Four node architectures with shared Tuneable Waveband Converters(TWBCs)are proposed,and their blocking performances are evaluated by simulation.Simulation results show that the blocking probability of a node is significantly improved by waveband conversion.The sharing efficiency of waveband converters is also investigated.Simulation results show that at the same blocking rate,the node architecture with converters shared per node can save more than 20% waveband converters compared with that of the one with converters shared per link.
文摘We demonstrate a 10. 7Gb/s-line-rate L-band wavelength-division-multiplexer （WDM） loop transmission over a 1890-kin standard single-mode fibre （SSMF） with a 100-km amplifier spacing as well as non-return-to-zero （NRZ） format. The dispersion compensating fibre （DCF） plus chirped tibre Bragg grating （CFBG） is employed for hybrid inline dispersion compensation. The power penalty of each channel is less than 3 dB after three-loop transmission. The experimental results show that high-performance CFBGs can be successfully used in ultra-long haul （〉 1000km） WDM systems. We also point out that the all-CFBG compensation scheme is not suitable for re-circulating loop transmissions.
基金supported by the National "973" Program of China (Nos. 2010CB328201 and 2010CB328202)the National Natural Science Foundation of China (Nos.60907030,60877045,60932004,and 60736003)the Scientific Research Foundation for the Returned Overseas Chinese Scholars
文摘Schemes integrating inter-carrier interference （ICI） self-cancellation and common phase error （CPE） com- pensation for coherent optical orthogonal frequency division multiplexing （CO-OFDM） systems are investi- gated. The purpose of our research is to counteract the impacts of laser phase noise and fiber nonlinearity. We propose two ICI self-cancellation-based CO-OFDM schemes, and adopt a pilot-aided decision feedback （DFB） loop for CPE compensation. The proposed schemes are compared with conventional CO-OFDM schemes at the same spectral efficiency. Simulations show that our schemes can not only enhance laser linewidth tolerance of the CO-OFDM system, but also present strong robustness against fiber nonlinearity.
基金supported by the National "973" Program of China (Nos. 2010CB328201 and 2010CB328202)the National Natural Science Foundation of China (Nos.60907030, 60736003, and 60931160439)the National"863" Program of China (No. 2011AA01A106)
文摘Orthogonal frequency division multiplexing-passive optical network （OFDM-PON） and single-carrier fre- quency division multiplexing （SCFDM）-PON are promising solutions for future high-speed PON-based access. A polarization division multiplexing scheme with direct detection is proposed for OFDM-PON to effectively reduce bandwidth requirements for components. However, the scheme strictly requires spec- trum overlapping of two orthogonal sidebands and the 4 × 4 multi-input-multi-output （MIMO） algorithm to eliminate complex cross-polarization interference. In this letter, we propose a polarization interleaving （PI） approach that significantly reduces bandwidth requirements for optical and electrical components while achieving a high-flexibility and low-complexity MIMO algorithm. Downstream single sideband PI-SCFDM transmission is experimentally demonstrated.
基金supported by the National "973" Program of China (Nos. 2012CB315606 and 2010CB328201)the National Natural Science Foundation of China (No.61071084)+1 种基金the US Department of Defense National Security Science and Engineering Faculty Fellowship (No.N00244-09-1-0013)the Chang Jiang Scholar Endowed Chair Professorship
文摘We demonstrate the long distance transmission of single-carrier frequency division multiple address sig- nals by directly-modulated optically injection-locked vertical-cavity surface-emitting laser. Transmission distance as long as 50 km is achieved at 5 Cb/s （2.5 Gb/s for each user） through data pattern inversion and higher frequency response gain under optical injection locking.
