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| 耦合式光电振荡器的动态腔长稳定控制 |
| Stable control of dynamic cavity length in coupled optoelectronic oscillator |
| 投稿时间：2022-03-31 |
| DOI：10.3969/j.issn.1005-5630.2023.001.006 |
| 中文关键词: 耦合式光电振荡器 再生锁模 腔长控制 I/Q混频 |
| 英文关键词:coupled optoelectronic oscillator regenerative mode-locking cavity length control in-phase/quadrature mixing |
| 基金项目:国家自然科学基金优秀青年科学基金 ( 62122054) |
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| 中文摘要: |
| 提出了一种基于耦合式光电振荡器的动态腔长长时稳定控制方案，当光谐振腔腔长变化时，通过同相正交（in-phase/quadrature，I/Q）混频器测量光谐振腔内选定两点的谐振相位变化量，反馈控制光电再生腔的光延迟线进行再生腔长跟随补偿，实现可变腔长的耦合式光电振荡器的锁模控制输出，从而将变化的谐振腔腔长转化为变化的谐振频率进行精密测量。经过系统实验，当谐振腔长变化时，振荡器可实时锁定输出可变的微波信号，并保持边模抑制比优于47.26 dB，1 h内功率抖动小于0.28 dB，锁定相位误差抖动在±1.5°以内。 |
| 英文摘要: |
| A long-term stability control scheme of the dynamic cavity length based on coupled optoelectronic oscillator is proposed. When the cavity length of the optical resonator changes, the resonant phase variation of two selected positions in the optical resonator is measured by the IQ mixer, and the optical delay line in the regeneration cavity is feedback-controlled to following compensation of the regeneration cavity length, and the controlled mode-locked output of the coupled optoelectronic oscillator with variable cavity length is realized, to convert the changing cavity length into the changing resonator frequency for measurement. After systematic experiments, the optoelectronic oscillator can output a variable locked microwave signal, and keep the side mode suppression ratio better than 47.26 dB, the power jitter less than 0.28 dB, and the lock phase error jitter within ±1.5° within 1 hour. |
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