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我们研制了具有约瑟夫逊效应的高ToGdBa2Cu3O7-薄膜双晶晶界结，对其交直流约瑟夫逊效应进行了观测，并用其进行光探测，用波长为0．6328μm的He－Ne激光器辐照双晶结结区，系统观测了双晶晶界结的光响应特性，得到的最好结果如下：噪音等效功率NEP=1．9×10－13W，归一化探测率D=53×109cmHzW－1，响应率Rv=4．2×107V／W，响应时间r=4．35×10－7s.
We developed a high ToGdBa2Cu3O7-thin film dual-grain boundary junction with Josephson effect and observed the AC-DC Josephson effect and used it for light detection. The double crystal was irradiated by a He-Ne laser with a wavelength of 0.6328μm The results are as follows: The noise equivalent power NEP = 1.9 × 10-13W, the normalized detection rate D = 53 × 109cmHzW-1 , Response rate Rv = 4.2 × 107V / W, response time r = 4.35 × 10-7s.