Abstract

Optically transparent wavelength converters, in which the output is a wavelength-converted replica of the input, may be required to improve performance and ease management in future "mixed-mode" wavelength division multiplexed networks. Four-wave mixing (FWM) in semiconductor optical amplifiers (SOA's) is an attractive optically transparent wavelength conversion technique because it allows pump tunability. So far, three schemes for polarization-insensitive FWM in SOA's have been demonstrated, using two copolarized pumps, two orthogonal pumps, and polarization diversity. This paper presents a comparison of their output signal-to-noise ratio, and hence their ultimate tunability. A simple analytical model for FWM in SOA's is used to predict that when each scheme has the same inputs and produces the same frequency shift, the polarization-diversity scheme has the highest output signal-to-noise ratio of the three schemes, and hence promises the greatest tunability.

[IEEE ]

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References

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  1. K. Inoue, "Four-wave mixing in an optical fiber in the zero-dispersion wavelength region," J. Lightwave Technol., vol. 10, pp. 1553-1561, Nov. 1992.
  2. G. P. Agrawal, "Population pulsations and nondegenerate four-wave mixing in semiconductor lasers and amplifiers," J. Opt. Soc. Am. B, vol. 5, pp. 147-159, Jan. 1988.
  3. 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, Dec. 1990.

J. Lightwave Technol. (2)

K. Inoue, "Four-wave mixing in an optical fiber in the zero-dispersion wavelength region," J. Lightwave Technol., vol. 10, pp. 1553-1561, Nov. 1992.

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, Dec. 1990.

J. Opt. Soc. Am. B (1)

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