摘要
In an experiment on the round-trip fiber transfer of joint frequency and time signals based on wavelengthdivision 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 104s in the forward direction, and is 1.7 × 10-14 at 1 s and 1.2 × 10-17 at 104s 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 × 10-14at1 s and 2.5 × 10-17 at 104s. The TDEV of the 1 pulse per second time signal is 6.8 ps with an average time of 103 s.
In an experiment on the round-trip fiber transfer of joint frequency and time signals based on wavelengthdivision 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 104s in the forward direction, and is 1.7 × 10-14 at 1 s and 1.2 × 10-17 at 104s 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 × 10-14at1 s and 2.5 × 10-17 at 104s. The TDEV of the 1 pulse per second time signal is 6.8 ps with an average time of 103 s.
基金
supported in part by the National Natural Science Foundation of China under Grant No.61405227
