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应用于40Gb/s电吸收调制器的Al2O3高速热沉研究

Keywords: 高速热沉电吸收调制器共面波导传输线薄膜电阻阻抗匹配

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Abstract:

设计制作了面向40Gb/s电吸收调制器(EAM)的高速微波过渡热沉,并进行了EAM管芯级封装测试的验证.这种基于氧化铝(Al2O3)的热沉采用共面波导(CPW)传输线以实现低损耗微波传送,以及Ta2N薄膜电阻用于EAM的阻抗匹配,采用Ti/Cu/Ni/Au金属材料作为CPW传输线电极材料,从而保证CPW传输线与Ta2N电阻材料之间良好的电接触,使热沉的典型反射系数在0—40GHz范围内均达到优于-21dB的水平.作为验证,采用该种热沉用于高速EAM的管芯级封装,测试得到小信号调制响应带宽超过40GHz.

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