Abstract

This paper describes the analysis, simulations, and proof-of-principle experiment on transparent monitoring of relative rise time using asynchronously sampled amplitude histograms in optical transmission systems. The method described is based on the count in a selected amplitude window between the mark and space levels. The method is evaluated under various amplitude windows and Q-factor values and is compared with synchronously sampled eye-diagram-based measurements. The results demonstrate that the 40-60% amplitude window is generally suitable for system rise-time monitoring purposes without clock information.

© 2004 IEEE

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J. Lightwave Technol. (4)

Other (10)

Z. Pan, Q. Yu, Y. Xie, S. A. Havstad, A. E. Willner, D. S. Starodubov and J. Feiberg, "Chromatic dispersion monitoring and automated compensation for NRZ and RZ data using clock regeneration and fading without adding signaling", in Proc. Optical Fiber Communications Conf. (OFC'2001), vol. 3, 2001, pp. WH5-1-WH5-3.

Q. Yu, L.-S. Yan, Z. Pan and A. E. Willner, "Chromatic dispersion monitor for WDM systems using vestigial-sideband optical filtering", in Proc. Optical Fiber Communications Conf. (OFC'02), 2002, pp. 197-199.

H. Takara, S. Kawanishi and M. Saruwatari, "Optical signal eye diagram measurement with subpicosecond resolution using optical sampling", Electron. Lett., vol. 32, no. 15, pp. 1399-1400, July 1996.

I. Shake, H. Takara and S. Kawanishi, "Simple Q factor monitoring for BER estimation using opened eye disgarms captured by high-speed asynchronous electrooptical sampling", IEEE Photon. Technol. Lett., vol. 15, pp. 620-622, Apr. 2003.

K. Mueller, N. Hanik, A. Gladisch, H.-M. Foisel and C. Caspar, "Application of amplitude histograms for quality of service measurements of optical channels and fault identification", in Proc. Eur. Conf. Optical Communication (ECOC'98), vol. 1, 1998, pp. 707-708.

P. S. André, J. L. Pinto, A. L. J. Teixeira, J. F. da Rocha, T. Almeida and M. Pousa, "Optical-signal-quality monitor for bit-error-ratio assessment in transparent DWDM networks based on asynchronously sampled amplitude histograms", J. Optical Networking, vol. 1, no. 3, pp. 118-128, Mar. 2002.

I. Shake, H. Takara, K. Uchiyama and Y. Yamabayashi, "Quality monitoring of optical signals influenced by chromatic dispersion in a transmission fiber using averaged Q -factor evaluation", IEEE Photon. Technol. Lett., vol. 13, pp. 385-387, Apr. 2001.

N. S. Bergano, F. Kerfoot and C. R. Davidson, "Margin measurements in optical amplifier systems", IEEE Photon. Technol. Lett., vol. 5, pp. 304-306, Mar. 1993.

G. P. Agrawal, Fiber-Optic Communication Systems, 2nd ed. New York: Wiley, 1997.

H. Chen, A. W. Poon and X.-R. Cao, "Amplitude histogram-based method for inline pulse rise time monitoring without eye-diagram", presented at the 2003 Conf. Lasers and Electro-optics (CLEO'03), Baltimore, MD, CThJ4, June 1-6, 2003.

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