摘要
提出用环氧树脂聚合物作为换能器与Hg2Br2声光介质的缓冲层(粘接层),设计Hg2Br2声光器件的换能器。根据换能器等效电路网络分析法,就x切LN/Hg2Br2声光器件的电极层各种金属材料和厚度计算了换能器损耗TL随规一化频率f/fo的变化关系。从声光器件的布喇格带宽和工艺条件出发,优化选择了换能器损耗为3dB范围内的换能器结构、电极层材料及其厚度和压电层厚度,并确保了换能器的倍频程带宽。
A method using epoxy resin ploymer as buffer coat between the transducer and Hg_2Br_2 acousto-optic crystal to design the transducer for Hg_2Br_2 AO devices is proposed.According to the equivalent circuit net analysis method,We have calculated the functional relationship between transducer loss TL and normalized frequency f/f_o for the x-cut LN/Hg_2Br_2 AO devices,with different metal layer materials and thickness.From the devices' Brags bandwidth and the technological conditions,the transdacer structure,the electrode layers materials and thickness,the piezoelectric thickness have been optimizod by the range of the 3dB loss transducer.The octave bandwidth of the transducer is ensured.
出处
《南昌大学学报（理科版）》
CAS
北大核心
2003年第4期394-398,共5页
Journal of Nanchang University(Natural Science)
关键词
Hg2Br2声光器件
换能器
带宽
镀层厚度
电极层
Hg_2Br_2 acousto-optic device
transducer
structure
bandwidth
electrode layers thickness
