双程色散声光可调谐滤波器设计
Design ofdouble-pass dispersion acousto-optic tunable filter
庞亚军 1姚美菱 2张锴 1白振旭1
作者信息
- 1. 河北工业大学先进激光技术研究中心,天津 300401;河北省先进激光技术与装备重点实验室,天津 300401
- 2. 石家庄邮电职业技术学院,石家庄 050021
- 折叠
摘要
声光可调谐滤波器(Acousto-Optic Tunable Filter,AOTF)是一种基于声光效应的色散器件,通过改变超声频率的大小,可以使光的衍射方向发生变化,从而进行波长选择.本研究设计了一种新的双程色散AOTF结构,并利用有限元分析软件对其滤波特性展开研究.研究结果表明,这种双程色散AOTF的设计可以有效地压缩光谱线宽,当中心波长为1 064 nm时,在超声工作频率为84 MHz的情况下,线宽压缩效率达到了28.6％,明显提高了光谱分辨率;同时,这种结构还具有较强的抑制旁瓣效果,可以将中心波长为1 064 nm的衍射光的旁瓣从-27.0 dB压缩至-44.8 dB,提高了光谱纯净度.
Abstract
Acousto-Optic Tunable Filter(AOTF)is a dispersive element based on acousto-optic effect.By chan-ging the ultrasonic frequency,the diffraction direction of the light can be changed,so as to select the wavelength.In this study,a new two-pass dispersive AOTF structure is designed and studied using finite element analysis software.The results of the present study show that the design of this dual-range dispersive AOTF can effectively compress the spectral linewidth.When the center wavelength is 1 064 nm,the linewidth compression efficiency reaches 28.6％at an ultrasonic operating frequency of 84 MHz,which indicates that the spectral resolution has been significantly im-proved;at the same time,this structure also has a strong inhibition of sidelobes,which can compress the sidelobes of the diffracted light with a center wavelength of 1 064 nm from-27.0 dB to-44.8 dB,which improves the spectral pu-rity.
关键词
声光衍射/声光效应/双程色散/有限元分析/光谱分辨率Key words
acousto-optic diffraction/acousto-optic effect/double-pass dispersion/finite element analysis/spectral resolution引用本文复制引用
基金项目
国家自然科学基金(61905063)
国家自然科学基金(61905061)
河北省自然科学基金(F2020202055)
河北省自然科学基金(F2019202337)
出版年
2024
NETL
NSTL
万方数据