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| 光纤光梳温度反馈控制方法研究 |
| Study on temperature feedback method of optical frequency comb |
| 投稿时间：2020-05-15 |
| DOI：10.3969/j.issn.1005-5630.2021.01.012 |
| 中文关键词: 非线性偏振旋转 光纤激光器 载波包络偏移频率 光学频率梳 温度控制 |
| 英文关键词:nonlinear polarization rotation fiber laser carrier envelope offset frequency optical frequency comb temperature control |
| 基金项目:国家重点研发计划（No.2018YFB0407100） |
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| 全文下载次数: 1881 |
| 中文摘要: |
| 为了解决光学频率梳长时锁定困难的问题，对光学频率梳重复频率（fr）与载波相位偏移频率（f0）的控制方法进行了改进。采用上、下两块半导体制冷片（TEC）对振荡器局部环境进行温度控制，并微调TEC温度将fr与f0漂移量分别稳定在10 Hz和600 Hz以内。利用锁相电路反馈控制有效腔长和泵浦光功率对fr与f0进行了精密锁定。光学频率梳在170 h时间内连续锁定，fr与f0抖动标准偏差分别为0.83 MHz和280 MHz。结果表明，该方法可以实现光学频率梳的长时锁定，增强其环境适应能力。 |
| 英文摘要: |
| In order to solve the problem of long-time operation of a fiber-based frequency comb, the control method of locking the repetition rate (fr) and carrier envelope phase offset frequency (f0) of optical frequency comb is improved. Two thermo-electric coolers (TEC), an upper one and an lower one, are used to control the temperature of frequency comb. By adjusting the TEC temperature, the stability of fr and f0 can be confined in the range of 10 and 600 Hz, respectively. Then, fr and f0 were further stabilized by the feed-back control of the optical path and the pump power, respectively. Finally, in 170-hour operation, the standard deviations of fr and f0 were measured as 0.83 and 280 mHz, respectively. The results show that the method can realize the long-term operation of the optical frequency comb and enhance its adaptability to the environment. |
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