法布里-珀罗滤波器的锯齿波驱动技术

Abstract

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

CLC Number:

TN253

WU Wei-Wei, YU Wei-Long, LI Xun-Tao, WU Wen-Bin. The Drive Technology of Sawtooth Wave for Fabry-Perot Filter[J]., 2012, 25(8): 16-.

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The Drive Technology of Sawtooth Wave for Fabry-Perot Filter

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