共查询到20条相似文献,搜索用时 15 毫秒
1.
Boffi P. Ferrario M. Marazzi L. Martelli P. Parolari P. Righetti A. Siano R. Martinelli M. 《Photonics Technology Letters, IEEE》2008,20(13):1118-1120
A 20-Gb/s transmission over 350-km standard single-mode fiber exploiting duobinary dispersion robustness and polarization-division multiplexing has been demonstrated. The system performance is evaluated employing an automatic endless polarization stabilizer and a suitably designed transmitter-side optical dispersion compensator. 相似文献
2.
《Photonics Technology Letters, IEEE》2009,21(16):1148-1150
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Wree C. Bhandare S. Becker D. Mohr D. Joshi A. 《Photonics Technology Letters, IEEE》2008,20(6):407-409
Record repeaterless transmission of differential phase-shift keying (DPSK) at 10.7 Gb/s over 304 km of standard single-mode fiber (SSMF) is demonstrated using a coherent optical receiver and electronic dispersion compensation. This is the longest repeaterless 10-Gb/s transmission over SSMF in the absence of Raman amplifiers. The high receiver sensitivity and the high tolerance to nonlinearities of DPSK allow us to overcome a total link loss of 58 dB with a 3-dB system margin. Coherent detection enables linear electrical dispersion compensation and avoids the use of optical dispersion compensation. 相似文献
4.
《Photonics Technology Letters, IEEE》2009,21(23):1767-1769
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《Lightwave Technology, Journal of》2010,28(4):494-501
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《Lightwave Technology, Journal of》2009,27(3):177-188
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8.
Jianqiang Li Kun Xu Guangtao Zhou Jian Wu Jintong Lin 《Lightwave Technology, Journal of》2007,25(8):1986-1995
Appropriate dispersion management possesses the superiority to relax the limitation of nonlinearities in high-speed transmission systems employing optical phase conjugation (OPC). In this paper, several dispersion-compensation schemes have been analytically and numerically investigated in a 160-Gb/s OPC system. A comprehensive performance comparison of these schemes over 1200-km transmissions has been carried out to present a reference for future OPC system designs. The scheme with a gradient dispersion map is recommended, particularly for G.655 fiber with a relatively low local dispersion. 相似文献
9.
Alfiad M.S. Kuschnerov M. Wuth T. Xia T.J. Wellbrock G. Schmidt E.-D. van den Borne D. Spinnler B. Weiske C.J. de Man E. Napoli A. Finkenzeller M. Spaelter S. Rehman M. Behel J. Chbat M. Stachowiak J. Peterson D. Lee W. Pollock M. Basch B. Chen D. Freiberger M. Lankl B. de Waardt H. 《Photonics Technology Letters, IEEE》2009,21(10):615-617
We demonstrate transmission of a 111-Gb/s coherent polarization-multiplexed return-to-zero differential quadrature phase-shift keying signal over 1040-km field-deployed fiber together with different types of neighboring channels, and with a cascade of 50-GHz reconfigerable optical add-drop multiplexers. Our transmission experiment proves the feasibility of transmitting a 111-Gb/s phase-modulated channel with 10 times 10.7-Gb/s on-off keying neighboring channels on a 50-GHz grid, despite the presence of strong cross-phase modulation. 相似文献
10.
《Lightwave Technology, Journal of》2009,27(16):3511-3517
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Quadrature amplitude modulation (QAM) is an excellent modulation format for realizing optical communication systems with a high spectral efficiency of much greater than 1bit/s/Hz. We describe QAM coherent optical communication that we achieved by using heterodyne detection with a frequency-stabilized fiber laser and an optical phase-locked loop (OPLL) technique. The phase error variance of the intermediate frequency signal of the OPLL was 6.1times10-3 rad. A 1-Gsymbol/s 64-QAM coherent signal was successfully transmitted over 150km 相似文献
12.
《Lightwave Technology, Journal of》2009,27(3):168-176
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《Photonics Technology Letters, IEEE》2008,20(22):1872-1874
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Pincemin E. Tan A. Tonello A. Wabnitz S. Ania-Castanon J.D. Mezentsev V. Turitsyn S.K. Jaouen Y. Gruner-Nielsen L. 《Photonics Technology Letters, IEEE》2007,19(20):1613-1615
We experimentally compare the performance of standard single-mode fiber (SSMF) and UltraWave fiber (UWF) for ultra-long-haul (ULH) 40-Gb/s wavelength-division-multiplexing transmissions. We used the carrier-suppressed return-to-zero amplitude-shift-keying (CSRZ-ASK) and the carrier-suppressed return-to-zero differential-phase-shift-keying (CSRZ-DPSK) formats, which are particularly well-adapted to 40-Gb/s pulse-overlapped propagation. We demonstrate that transmission distance well beyond 2000 km can be reached on UWF with both the CSRZ-ASK and CSRZ-DPSK formats, or on SSMF with the CSRZ-DPSK format only, thus indicating that SSMF-based infrastructure of incumbent carriers can be upgraded at 40-Gb/s channel rates to ULH distances. 相似文献
15.
A straight-line 160-Gb/s 1000-km differential phase-shift keying transmission was successfully demonstrated with time-domain optical Fourier transformation (OFT) without employing polarization multiplexing or Raman amplification. The OFT greatly reduced the transmission impairments caused by linear perturbations, and transmission performance close to the amplified spontaneous emission limit was achieved. 相似文献
16.
An optical-heterodyne-detection method for a 60-GHz radio-on-fiber uplink is proposed and verified in this paper. The main point of this proposal is that all the functions needed for the optical heterodyne detection, i.e., the local/carrier light sources, the automatic frequency control of these light sources, and a polarization-diversity-detection circuit, are consolidated in one transmitting-side module to realize a simple system configuration. This proposal realizes an adequate optical uplink budget with low-cost optical receivers that consist of just one IF-band photodetector and one envelope detector. A 1.0-Gb/s transmission experiment over 10 km of single-mode fiber, which represents access-network transmission, is demonstrated using a 61.0-GHz amplitude-shift-keying signal as a 60 GHz-band uplink signal. A BER of less than 10-9 was obtained at an uplink SSB signal power of -40 dBm regardless of the polarization state of the optical uplink signal, and no significant dispersion-induced degradation was noted. 相似文献
17.
《Lightwave Technology, Journal of》2009,27(4):396-408
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Commercial dynamically tunable lasers (DTLs) for dense wavelength-division-multiplexing optical networks are integrated devices into a butterfly package. Thus, their dimensions are much smaller than standard external cavity tunable lasers. Despite the reduced size, they present unexpected low phase noise. In this letter, the DTL phase noise is fully characterized for real-time optical coherent communication applications by using a suitable measurement technique based on an optical phase-locked loop. We experimentally demonstrate that DTLs can be used in a 10-Gb/s binary phase-shift-keying coherent optical communication system based on a phase-locking technique and a decision-driven architecture. 相似文献
19.
1-Tb/s Single-Channel Coherent Optical OFDM Transmission With Orthogonal-Band Multiplexing and Subwavelength Bandwidth Access 总被引:1,自引:0,他引:1
《Lightwave Technology, Journal of》2010,28(4):308-315
20.
相干光正交频分复用系统(CO-OFDM,Coherent Optical Orthogonal Frequency Division Multiplexing)可有效抑制光纤色度色散和偏振模色散,有望成为解决未来高速光传输的主流方案。这里结合光传输理论及正交频分复用系统(OFDM,Orthogonal Frequency Division Multiplex)技术原理,对CO-OFDM系统方案实现及信道等效模型进行了分析,通过数字仿真验证系统光调制器偏置点选择及信号均衡算法。理论分析和仿真结果表明,CO-OFDM系统采用单抽头频域均衡,可有效抑制光纤色散效应。光调制器偏置点选择在零点,可实现系统对OFDM信号的最佳线性调制,与传统强度调制/直接检测(IM/DD)系统比较,CO-OFDM系统品质因子有10 dB提高。 相似文献