Two-level injection in fiber-delay line based oscillator |
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| Authors: | Weimin Gao An Liu Yuan Yao Jun Hong Xiaoyong Fang Jian Guo |
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| Affiliation: | 1. School of Computer and Information Science, Hunan Institute of Technology, Hengyang 421002, Hunan, China;2. School of Electrical and Information Engineering, Hunan Institute of Technology, Hengyang 421002, Hunan, China;3. School of Information Science and Engineering, Southeast University, Nanjing 210096, Jiangsu, China;4. College of information science and engineering, Northeastern university, Shenyang, 110819, China |
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| Abstract: | Two-level injection-locked opto-electronic oscillator is proposed for low phase noise. Dielectric resonator oscillator (DRO) is used as the first injection source, injection locking a long-fiber loop based opto-electronic oscillator, then its output is injection locking another long-fiber opto-electronic oscillator for getting a lower-phase noise output carrier. After the first injection, the single side band (SSB) phase noise at 10 kHz offset frequency decreases from −123 dBc/Hz to −135 dBc/Hz, then through the second injection the SSB phase noise drops down to −146 dBc/Hz. |
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| Keywords: | Phase noise Opto-electronic oscillator Single side band Offset frequency |
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