| 一种双频激光干涉信号探测器的设计 |
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| 引用本文： | 乐燕芬,时颖,句爱松.一种双频激光干涉信号探测器的设计[J].激光技术,2012,36(6):759-762. |
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| 作者姓名： | 乐燕芬 时颖 句爱松 |
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| 作者单位： | 1.上海理工大学光电信息与计算机工程学院, 上海200093 |
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| 基金项目： | 上海市教委重点学科建设基金资助项目(J50505); 国家自然科学基金资助项目(51075280) |
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| 摘 要： | 为了获取高精密双频激光干涉测量中的干涉信号,完成了一种新的光电探测器电路设计。该探测器利用AD645设计了精密低噪声光电转换前置放大器,保证微弱干涉光信号的有效接收;增益可调的主放大器设计保证输出信号足够的动态范围,适应不同类型的干涉信号处理电路,双二次型带通滤波器有效抑制了噪声与温漂。结果表明,研制的光电探测器能完成微弱干涉信号的接收处理,信噪比高、频率稳定、结构简单易实现,可应用于高精密比相计等激光干涉仪信号处理装置。
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| 关 键 词： | 光电子学 双频激光干涉仪 光电信号探测器 低噪声 增益可调 |
| 收稿时间： | 2012/3/9 |
Design of heterodyne interferometer signal detectors |
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| LE Yan-fen
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SHI Ying
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JU Ai-song.Design of heterodyne interferometer signal detectors[J].Laser Technology,2012,36(6):759-762. |
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| Authors: | LE Yan-fen SHI Ying JU Ai-song |
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| Abstract: | In order to obtain the interference signal in a high-precision heterodyne interferometer, a new design of gain-controlled weak-signal detector was presented. In the detector circuit, a low noise photoelectric conversion pre-amplifier was designed based on AD645 to convert the weak interferometric beam effectively. A gain-controlled main amplifier was designed to guarantee the dynamic range for the signal and applicable for various processing circuit. A biquad band-pass filter was introduced to minimize the noise and the temperature drift. It is verified experimentally that the output signal of detector has high signal-to-noise ratio, large dynamic range and high gain. The detector with high performance can be used in high precision interferometers. |
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| Keywords: | optoelectronics heterodyne interferometer photoelectric signal detector low noise gain control |
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