Abstract

Polarization mode dispersion (PMD) limits optical fiber capacity. PMD compensators usually minimize the associated eye closure. This measure scales with the square of the differential group delay (DGD) and makes it difficult to detect low DGDs. However, light with a low-speed polarization modulation suffers arrival time variations, in the presence of PMD, that are proportional to the DGD. These are detected by integrating the voltage-controlled oscillator (VCO) input signal of the clock recovery phase-locked loop (PLL). This novel method has been demonstrated for 40 Gb/s nonreturn-to-zero (NRZ) and for 2 x 40 Gb/s return-to-zero (RZ) polarization division multiplex transmission. PMD detection sensitivities range between 2 ps and 84 fs.

© 2002 IEEE

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J. Lightwave Technol. (2)

R. Noe, et al. "Polarization mode dispersion compensation at 10, 20 and 40 Gb/s with various optical equalizers", J. Lightwave Technol., vol. 17, pp. 1602-1616, Sept. 1999 .

R. Noe, et al. "Endless polarization control systems for coherent optics", J. Lightwave Technol., vol. 6, pp. 1199-1207, July 1988.

Other (11)

T. Takahashi, et al. "Automatic compensation technique for timewise fluctuating polarization mode dispersion in in-line amplifier systems", Electron. Lett., vol. 30, pp. 348-349, Feb. <day>17</day>, 1994.

M. Yoshimura, T. Kudo and T. Ozeki, "Polarization mode dispersion equalization", in Proc. OEC '94, Makuhari Messe, Japan, 1994,14E-12,. pp. 258-259.

H. Rosenfeldt, et al. "Automatic PMD compensation at 40 Gbit/s and 80 Gbit/s using a 3-dimensional DOP evaluation for feedback", in Proc. OFC2001,, PD27-1.

A. Chraplyvy, et al. "1-Tb/s Transmission experiment", IEEE Photon. Technol. Lett., pp. 1264-1266, Aug. 1996.

S. Hinz, et al. "Interference detection enables 2 x 20Gbit/s RZ polarization division multiplex transmission", Electron. Lett., vol. 37, pp. 511-512, Apr. <day>12</day>, 2001.

R. Noe, D. Sandel, S. Hinz, M. Yoshida-Dierolf, V. Mirvoda, G. Feise, H. Herrmann, R. Ricken, W. Sohler, F. Wehrmann, C. Glingener, A. Schopflin, A. Farbert and G. Fischer, "Integrated optical LiNbO3 distributed polarization mode dispersion equalizer in 20 Gbit/s transmission system", Electron. Lett., vol. 35, pp. 652-654, Apr. <day>15</day>, 1999.

C. D. Poole and R. E. Wagner, "Phenomenological approach to polarization dispersion in long single-mode fibers", Electron. Lett., vol. 22, pp. 1029-1030, 1986.

B. H. Billings, "A monochromatic depolarizer", J. Opt. Soc. Amer. , vol. 41, pp. 966-975, 1951.

R. Noe, et al. "Depolarizer based on acoustooptical TE-TM converters for suppression of polarization holeburning in long haul EDFA links", Electron. Lett., vol. 30, pp. 1500-1501, Sept. <day>1</day>, 1994.

D. A. Smith and R. Noe, "New polarization scrambler using Ti: LiNbO 3 rotating waveplate,"in Proc. IGWO, Santa Fe, NM: OSA, 1988, pp. 111-114.

H.-M. Rein, "Si and SiGe bipolar ICs for 10 to 40 Gb/s optical-fiber TDM links", Int. J. High Speed Electron. Syst., vol. 9, no. 2, 1998.

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