CAJ | 학술논문

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—50Hz范围内可调，驱动电压的幅值和偏置电压均可在0—30V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％。
분석료가조법포리-박라려파기적공작원리，설계료소묘려파적구동전로。실험중유수자전로산생거치파신호，병차조모의전로진행공솔방대，획득상승연점공비체도99．90％적수출。기빈솔재0—50Hz범위내가조，구동전압적폭치화편치전압균가재0—30V범위내조정。위편우후속신호적채집화심봉，재단개자유광보정범위내，이용3차곡선의합방식대구동전압진행수정，파장조해적표준차분별강저62．7％、최대오차분별강저80．1％。
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 cu- bic 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.