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Optica Publishing Group
  • Chinese Optics Letters
  • Vol. 13,
  • Issue 11,
  • pp. 110601-
  • (2015)

Bidirectional erbium-doped fiber amplifiers used in joint frequency and time transfer based on wavelength-division multiplexing technology

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Abstract

In an experiment on the round-trip fiber transfer of joint frequency and time signals based on wavelength-division multiplexing technology, a specific bidirectional erbium-doped fiber amplifier (Bi-EDFA) with low noise and high symmetry simultaneously is designed and applied to compensate for the loss of the link. The Allan deviation (ADEV) deterioration of the 1 GHz frequency signal induced by the Bi-EDFA is only 8×10−15 at 1 s and 9×10−18 at 104 s in the forward direction, and is 1.7×10−14 at 1 s and 1.2×10−17 at 104 s in the backward direction. The degraded time deviation (TDEV) caused by the asymmetry of the Bi-EDFA is only 0.8 ps at an average time of 103 s. With the proposed Bi-EDFA, in the field experiment on the 110 km fiber transfer of joint frequency and time signals, the ADEV of the 1 GHz frequency signal is 7.3×10−14 at 1 s and 2.5×10−17 at 104 s. The TDEV of the 1 pulse per second time signal is 6.8 ps with an average time of 103 s.

© 2015 Chinese Laser Press

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