›› 2012, Vol. 25 ›› Issue (8): 16-.

• 论文 • 上一篇    下一篇

法布里-珀罗滤波器的锯齿波驱动技术

吴伟伟,余有龙,李勋涛,吴文斌   

  1. (1.合肥工业大学 仪器科学与光电工程学院,安徽 合肥 230009;2.德赛电子科技有限公司 研发中心,广东 惠州 516029; 3.建设综合勘察研究设计院 北京综建科技有限公司,北京 100007)
  • 出版日期:2012-08-15 发布日期:2012-08-28
  • 作者简介:吴伟伟(1986—),女,硕士研究生。研究方向:光纤光栅传感,电子电路。

The Drive Technology of Sawtooth Wave for Fabry-Perot Filter

 WU Wei-Wei, YU Wei-Long, LI Xun-Tao, WU Wen-Bin   

  • Online:2012-08-15 Published:2012-08-28

摘要:

分析了可调法布里-珀罗滤波器的工作原理,设计了扫描滤波的驱动电路。实验中由数字电路产生锯齿波信号,并借助模拟电路进行功率放大,获得上升沿占空比达到99.90%的输出。其频率在0~50 Hz范围内可调,驱动电压的幅值和偏置电压均可在0~30 V范围内调整。为便于后续信号的采集和寻峰,在单个自由光谱程范围内,利用3次曲线拟合方式对驱动电压进行修正,波长调谐的标准差分别降低62.7%、最大误差分别降低80.1%。

关键词: 法布里-珀罗滤波器, 锯齿波, 嵌入式, 非线性

Abstract:

The working principle of the tunable Fabry-Perot (F-P) filter is analyzed,and the driving circuit of the filter is designed.In the experiment,a sawtooth wave is obtained by using a digital circuit,which is amplified by an analog circuit.Thus the duty cycle of the rising edge of the sawtooth wave can amount to 99.90%.And its frequency can be adjusted from 0 to 50 Hz.Both the amplitude of the output voltage and offset can be adjusted from 0 V to 30 V.To sample and search the signal and peak more easily,the applied voltage is rectified by using the cubic fitting algorithm in a free spectral range.Experiment results show that the standard error and the maximum error of the tuning wavelength are reduced by 62.7% and 80.1%,respectively.

Key words: F-P filter;sawtooth wave;embedded;nonlinear

中图分类号: 

  • TN253