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An increase in the transmission efficiency of an RF fiber-optic line using the working point of an external modulator

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Abstract

A method to increase the transmission efficiency of an analog fiber-optic line using a shift of the working point of an external modulator toward minimum transmission is proposed. The method is based on an increase in the signal contrast owing to the suppression of the constant component and the application of an erbium-fiber amplifier in the near-saturation mode. An increase in the transmission (up to 5 dB) in comparison with the transmission corresponding to the quadrature working point is demonstrated. An increase in the nonlinear distortion factor due to the shift of the modulator from the quadrature working point is analyzed. An increase in the nonlinear distortions under the conditions for the maximum transmission is no greater than 0.5%. A theoretical model is developed to describe the experimental effects. The theoretical results are in good agreement with the experimental data.

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Authors and Affiliations

  1. St. Petersburg State Polytechnic University, Politekhnicheskaya ul. 29, St. Petersburg, 195251, Russia

    A. N. Petrov, E. N. Velichko & A. V. Shamrai

  2. Ioffe Physical Technical Institute, Russian Academy of Sciences, Politekhnicheskaya ul. 26, St. Petersburg, 194021, Russia

    A. N. Petrov, A. V. Tronev, V. V. Lebedev, I. V. Il’ichev & A. V. Shamrai

  3. University of Information Technologies, Mechanics, and Optics, Kronverkskii pr. 49, St. Petersburg, 197101, Russia

    A. V. Tronev, E. N. Velichko & A. V. Shamrai

Authors
  1. A. N. Petrov
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  2. A. V. Tronev
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  3. V. V. Lebedev
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  4. I. V. Il’ichev
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  5. E. N. Velichko
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  6. A. V. Shamrai
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Correspondence to A. N. Petrov.

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Original Russian Text © A.N. Petrov, A.V. Tronev, V.V. Lebedev, I.V. Il’ichev, E.N. Velichko, A.V. Shamrai, 2015, published in Zhurnal Tekhnicheskoi Fiziki, 2015, Vol. 85, No. 5, pp. 131–136.

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Petrov, A.N., Tronev, A.V., Lebedev, V.V. et al. An increase in the transmission efficiency of an RF fiber-optic line using the working point of an external modulator. Tech. Phys. 60, 761–766 (2015). https://doi.org/10.1134/S1063784215050217

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  • DOI: https://doi.org/10.1134/S1063784215050217

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