Acta Photonica Sinica, Volume. 47, Issue 11, 1123001(2018)
Frequency Stabilization of a Wideband Tunable Optoelectronic Oscillator Based on Intermediate Frequency Phase-locked Technique
A scheme for improving the long-term stability of a wideband tunable optoelectronic oscillator based on intermediate frequency phase-locked loop technique is proposed. In the scheme, an external tunable local oscillator is used to down-convert the RF signal of the optoelectronic oscillator to generate an intermediate frequency signal, which is independent of the oscillating frequency of the optoelectronic oscillator. Phase-locking of the intermediate frequency signal to a stable reference source can improve the long-term stability of the wideband tuanble optoelectronic oscillator. The impact of the phase-locked loop on the phase noise performance of the optoelectronic oscillator is also analyzed. Experimental results show that the frequency tuning range of the optoelectronic oscillator is 5~15 GHz, the phase noise is -121.2 dBc/Hz at 10 kHz offset and the long-term stability is 6.9×10-11/103 s. It indicates that the proposed method can significantly improve the long-term stability of a wideband tunable optoelectronic oscillator.
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TONG Guo-chuan, ZHOU Jin-hai, JIN Tao, CHI Hao, ZHU Xiang, LI Dong, ZUO Lu-lu. Frequency Stabilization of a Wideband Tunable Optoelectronic Oscillator Based on Intermediate Frequency Phase-locked Technique[J]. Acta Photonica Sinica, 2018, 47(11): 1123001
Received: May. 21, 2018
Accepted: --
Published Online: Dec. 17, 2018
The Author Email: Guo-chuan TONG (tgc2013@zju.edu.cn)