| 激光回馈双折射测量系统波片光轴的自动定位 |
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| 引用本文： | 邓勇,马响.激光回馈双折射测量系统波片光轴的自动定位[J].激光技术,2019,43(2):217-221. |
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| 作者姓名： | 邓勇 马响 |
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| 作者单位： | 南通大学 机械工程学院,南通,226019;南通大学 机械工程学院,南通,226019 |
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| 摘 要： | 为了解决传统双折射测量系统在调节光学元件的过程中,结构复杂、耗时长且不状态稳定的问题,采用计算偏振跳变曲线中o光和e光低电平占空比的方法,增加了自动旋转波片的功能,优化出一套具有较高工作效率的双折射测量系统。该系统可自动调整波片快轴方向,使其可对准激光器的本征偏振方向,减少了人为判断波片快轴时可能引入的测量误差。结果表明,波片相位延迟的最大偏差为0.65°,标准差降低28%。双折射测量系统的测量精度及稳定性满足工业化生产的要求。
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| 关 键 词： | 测量与计量 激光回馈 正交偏振 波片测量 自动控制 |
| 收稿时间： | 2018-04-17 |
Automatic positioning of optical axis of wave-plate in a laser feedback birefringence measurement system |
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| DENG Yong,MA Xiang.Automatic positioning of optical axis of wave-plate in a laser feedback birefringence measurement system[J].Laser Technology,2019,43(2):217-221. |
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| Authors: | DENG Yong MA Xiang |
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| Affiliation: | (School of Mechanical Engineering, Nantong University,Nantong 226019, China) |
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| Abstract: | In order to solve the problem of complex structure, time-consuming and unstable state in the process of adjusting optical elements in a traditional birefringence measurement system, the duty cycles of o light and e light at low levels in polarization flipping curves were calculated.The function of automatic rotating wave-plate was added in a birefringence measurement system optimized with high efficiency.The system can automatically adjust the direction of fast axis of the wave-plate aligned with the intrinsic polarization direction of laser and reduce the measurement error that may be introduced when judging the fast axis of wave-plate artificially.After many measurements, the results show that the maximum deviation of wave-plate phase delay is 0.65°, and the standard deviation is reduced by 28%.The measurement accuracy and stability of birefringence measurement systems have met the requirements of industrial production. |
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| Keywords: | measurement and metrology laser feedback orthogonal polarization wave-plate measurement automatic control |
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