Principles for electronic equalization of polarization-mode dispersion

System performance of optical fiber transmission in the presence of polarization-mode dispersion (PMD) can be improved by various types of electronic equalizers, which will be discussed in this paper. After a brief review of equalization and detection theory, equalizer concepts are adapted to the nonlinear optical channel and the architecture is optimized for high bit rate applications. Simulation results accounting for implementation losses in state-of-the-art technologies and realistic transmission conditions indicate that these concepts provide adequate solutions for equalization in lightwave transmission systems.

[1]  Andrew C. Singer,et al.  Turbo equalization: principles and new results , 2002, IEEE Trans. Commun..

[2]  R. Stephenson.  A and V , 1962, The British journal of ophthalmology.

[3]  F. Buchali,et al.  Fast eye monitor for 10 Gbit/s and its application for optical PMD compensation , 2001, OFC 2001. Optical Fiber Communication Conference and Exhibit. Technical Digest Postconference Edition (IEEE Cat. 01CH37171).

[4]  A. Dittrich,et al.  ITERATIVE EQUALIZATION FOR NONLINEAR CHANNELS WITH INTERSYMBOL INTERFERENCE AND HIGH RATE CODES , 2004 .

[5]  Peter J. Winzer,et al.  Optimum filter bandwidths for optically preamplified NRZ receivers , 2001 .

[6]  J.H. Winters,et al.  Techniques for High-Speed Implementation of Nonlinear Cancellation , 1991, IEEE J. Sel. Areas Commun..

[7]  J.H. Winters,et al.  Reducing the effects of transmission impairments in digital fiber optic systems , 1993, IEEE Communications Magazine.

[8]  Patrick Robertson,et al.  A comparison of optimal and sub-optimal MAP decoding algorithms operating in the log domain , 1995, Proceedings IEEE International Conference on Communications ICC '95.

[9]  Henning Bulow.  PMD mitigation techniques and their effectiveness in installed fiber , 2000, Optical Fiber Communication Conference. Technical Digest Postconference Edition. Trends in Optics and Photonics Vol.37 (IEEE Cat. No. 00CH37079).

[10]  Gerhard Fettweis,et al.  A CMOS IC for Gb/s Viterbi decoding: system design and VLSI implementation , 1996, IEEE Trans. Very Large Scale Integr. Syst..

[11]  M. Schetzen.  The Volterra and Wiener Theories of Nonlinear Systems , 1980 .

[12]  Michael Schlechtweg,et al.  ISI mitigation using decision feedback loop demonstrated with PMD distorted 10 Gbit/s signals , 1999 .

[13]  J. Poirrier,et al.  Experimental nonlinear cancellation of polarization-mode dispersion , 2000, Optical Fiber Communication Conference. Technical Digest Postconference Edition. Trends in Optics and Photonics Vol.37 (IEEE Cat. No. 00CH37079).

[14]  S. P. Lloyd,et al.  Least squares quantization in PCM , 1982, IEEE Trans. Inf. Theory.

[15]  R. Schlenk,et al.  Control of combined electrical feed-forward and decision feedback equalization by conditional error counts from FEC in the presence of PMD , 2003, OFC 2003 Optical Fiber Communications Conference, 2003..

[16]  Richard D. Gitlin,et al.  Optimum Detection of Quantized PAM Data Signals , 1976, IEEE Trans. Commun..

[17]  Richard D. Gitlin,et al.  Electrical signal processing techniques in long-haul, fiber-optic systems , 1990, IEEE International Conference on Communications, Including Supercomm Technical Sessions.

[18]  J. Nagel,et al.  Chapter 6 – Polarization Effects in Lightwave Systems , 1997 .

[19]  John G. Proakis,et al.  Digital Communications , 1983 .

[20]  E. Desurvire.  Erbium-doped fiber amplifiers , 1994 .

[21]  Y. Akasaka,et al.  DWDM 40G transmission over trans-pacific distance (10 000 km) using CSRZ-DPSK, enhanced FEC, and all-Raman-amplified 100-km UltraWave fiber spans , 2004, Journal of Lightwave Technology.

[22]  B. Mikkelsen,et al.  DWDM 40 G transmission over trans-Pacific distance (10,000 km) casing CSRZ-DPSK, enhanced FEC and all-Raman amplified 100 km UltraWave/spl trade/ fiber spans , 2003, OFC 2003 Optical Fiber Communications Conference, 2003..

[23]  Sergio Benedetto,et al.  Digital Transmission Theory , 1987 .

[24]  M. O. Pedersen,et al.  6.4-Tb/s (160×42.7 Gb/s) transmission with 0.8 bit/s/Hz spectral efficiency over 32×100 km of fiber using CSRZ-DPSK format , 2003, OFC 2003.

[25]  R. Urbansky,et al.  Design of near optimum electrical equalizers for optical transmission in the presence of PMD , 2001, OFC 2001. Optical Fiber Communication Conference and Exhibit. Technical Digest Postconference Edition (IEEE Cat. 01CH37171).

[26]  P. Humblet,et al.  On the bit error rate of lightwave systems with optical amplifiers , 1991 .

[27]  A.H. Gnauck,et al.  6.4-Tb/s (160/spl times/42.7 Gb/s) transmission with 0.8 bit/s/Hz spectral efficiency over 32/spl times/100 km of fiber using CSRZ-DPSK format , 2003, OFC 2003 Optical Fiber Communications Conference, 2003..

[28]  R. Urbansky,et al.  Adaptation of electronic PMD equaliser based on BER estimation derived from FEC decoder , 2001, Proceedings 27th European Conference on Optical Communication (Cat. No.01TH8551).

[29]  B. Razavi,et al.  Challenges in the design of high-speed clock and data recovery circuits , 2002, IEEE Commun. Mag..

[30]  Konrad Sticht,et al.  Control of 3-tap electrical feed-forward equalizer by conditional error counts from FEC in the presence of PMD , 2002, Optical Fiber Communication Conference and Exhibit.

[31]  D. V. Gapontsev,et al.  Transmission of 40×42.7 Gbit/s over 5200 km UltraWave® fiber with terrestrial 100 km spans using turn-key ETDM transmitter and receiver , 2002 .