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为了提高弹光调制器在高压驱动下的工作效率,以提高傅里叶变换光谱仪的光谱分辨率,在建立弹光调制器的损耗模型和振动方程的基础上,描述了包含损耗因数的弹光调制器幅频特性,并推导了谐振和反谐振频率下弹光调制器的品质因数。结合压电材料的电致伸缩效应及其损耗,分析了高压驱动下各损耗因数之间的关系,提出了一种较谐振驱动具有更高品质因数和调制深度的反谐振驱动方法。实验验证,当驱动电压在500~1200 VP-P范围内,反谐振驱动方法较传统的谐振驱动方式,品质因数和调制深度均提高了43%,有效地提高了弹光调制器的工作效率。
In order to improve the working efficiency of the elastic modulator driven by high voltage and to improve the spectral resolution of the Fourier transform spectrometer, based on the establishment of the loss model and the vibration equation of the elastic modulator, Modulator amplitude-frequency characteristics, and derive the quality factor of the fly-back modulator at resonant and anti-resonant frequencies. Based on the electrostrictive effect and loss of piezoelectric materials, the relationship between loss factors under high voltage is analyzed and an anti-resonance driving method with higher quality factor and modulation depth than resonance driving is proposed. The experimental results show that the anti-resonance driving method improves the efficiency of the fly-out modulator effectively by 43% compared with the traditional resonant driving mode with a driving voltage of 500-1200 VP-P.