Abstract

We study a technique to measure the radio-frequency (RF) spectrum of an optical signal based on nonlinear optics. The conventional approach,based on fast photodetection and analysis of the generated photocurrent via electronics means, is replaced by a nonlinear interaction of the source under test with a quasimonochromatic source followed by an optical spectrum measurement. Our technique has the advantage of an all-optical measurement that can provide a much larger bandwidth than electronic alternatives. The properties of this diagnostic, such as resolution and bandwidth, are studied. Typical applications to the monitoring of optical signals are presented.

© 2004 IEEE

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J. Lightwave Technol. (3)

R. W. Tkach and A. R. Chraplyvy, "Phase noise and linewidth in an InGaAsP DFB laser", J. Lightwave Technol., vol. 4, pp. 1711-1716, 1986.

T. Durhuus, B. Mikkelsen, C. Joergensen, S. L. Danielsen and K. E. Stubkjaer, "All-optical wavelength conversion by semiconductor optical amplifiers", J. Lightwave Technol., vol. 14, pp. 942-954, 1996.

D. Marcuse, "Derivation of analytical expressions for the bit-error probability in lightwave systems with optical amplifiers", J. Lightwave Technol., vol. 8, pp. 1816-1823, 1990.

Opt. Lett. (2)

Other (11)

C. Dorrer and D. N. Maywar, "Ultra-high bandwidth RF spectrum analyser for optical signals", Electron. Lett., vol. 39, pp. 1004-1005, 2003.

G. Agrawal, Nonlinear Fiber Optics,: Academic Press, 1989 .

A. E. Willner and B. Hoanca, "Fixed and tunable management of fiber chromatic dispersion," in Optical Fiber Telecommunications IV B, I. Kaminov, and T. Li, Eds. New York: Academic, 2002, pp. 704-705.

H. Kogelnik, R. M. Jopson and L. E. Nelson, "Polarization mode dispersion," in Optical Fiber Telecommunications IV B, I. Kaminov, and T. Li, Eds. Academic, 2002, pp. 820-822.

H. R. Stuart, "Signal-to-noise ratio monitoring of optical data using narrow band RF analysis at the half-clock frequency", in Proc. Optical Fiber Communication Conference, vol. 1, 2003, pp. 407-409.

L. F. Mollenauer, M. J. Neubelt, S. G. Evangelides, J. P. Gordon, J. R. Simpson and L. G. Cohen, "Experimental study of soliton transmission over more than 10 000 km in dispersion-shifted fiber", Opt. Lett. , vol. 15, pp. 1203-1205, 1990.

J. W. Nicholson, S. Ramachandran, S. Ghalmi, E. A. Monberg, F. V. DiMarcello, M. F. Yan, P. Wisk and J. W. Fleming, "Electrical spectrum measurements of dispersion in higher order mode fibers", IEEE Photon. Technol. Lett., vol. 15, pp. 831-833, 2003.

B. P. Lathi, Modern Digital and Analog Communication Systems, Oxford: U.K.: Oxford University Press, 1998 .

A. Braun, J. V. Rudd, H. Cheng, G. Mourou, D. Kopf, I. D. Jung, K. J. Weingarten and U. Keller, "Characterization of short-pulse oscillators by means of a high-dynamic-range autocorrelation measurement", Opt. Lett. , vol. 20, pp. 1889-1891, 1995.

K. J. Park, C. J. Youn, J. H. Lee and Y. C. Chung, "Performance comparisons of chromatic dispersion-monitoring techniques using pilot tones", IEEE Photon. Technol. Lett., vol. 15, pp. 873-875, 2003.

M. Born and E. Wolf, Principles of Optics, Oxford: U.K.: Cambridge University Press, 1980.

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