A photomixer local oscillator for a 630-GHz heterodyne receiver
A photomixer local oscillator for a 630-GHz heterodyne receiver
复制标题
用于 630 GHz 外差接收器的光电混频器本地振荡器
DOI：
10.1109/75.769535
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发表时间：
1999
期刊：
影响因子：
--
通讯作者：
R. Blundell
中科院分区：
文献类型：
--
作者：
S. Verghese;E. Duerr;K. McIntosh;S. Duffy;S. Calawa;C. Tong;R. Kimberk;R. Blundell
利用基于Nb超导隧道结的外差探测器，成功地实现了工作在两个激光二极管630 GHz差频的光电混合器本机振荡器。低温生长的砷化镓光电混合器在接收器的输入空间模式下产生0.2μW的光。在使用光电混合器LO时，接收机的双边带噪声温度为331K，与用0.25μW的倍增耿氏振荡器代替光电混合器得到的323K噪声温度一致。
A photomixer local oscillator (LO) operating at the 630-GHz difference frequency of two laser diodes was successfully demonstrated with a heterodyne detector based on a niobium superconducting tunnel junction. The low-temperature-grown GaAs photomixer generated 0.20 μW in the input spatial mode of the receiver. Using the photomixer LO, the double-sideband noise temperature of the receiver was 331 K-in good agreement with the 323 K noise temperature obtained when a multiplied Gunn oscillator generating 0.25 μW was substituted for the photomixer.