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研制了具有约瑟夫逊效应的高TcGdBa2Cu3O7-δ薄膜双晶晶界结，按照光助隧道效应的原理我们用双晶结进行光探测，光源是波长为0．6328μm的He-Ne激光器，系统观测了高TcGdBa2Cu3O7-δ双晶结的光响应特性，最好的结果为：噪声等效功率NEF＝4．3×10－（14）WHz（－1／2），归一化探测率D＝1．2×10（10）cmHz（1／2）W－1，响应率Rv＝3．5×107V／W，响应时间τ≤4．12×10－7s。
The high TcGdBa2Cu3O7-δ thin film dual-crystal grain boundary junction with Josephson effect was developed. According to the photo-assisted tunneling principle, we use double crystal junction for light detection. The light source is a He-Ne laser with a wavelength of 0.6328μm. The best results for the photoresponse of the high TcGdBa2Cu3O7-δ twin junction are as follows: noise equivalent power NEF = 4.3 × 10- (14) WHz (-1/2) and normalized detection rate D = 1. 2 × 10 (10) cmHz (1/2) W-1, response rate Rv = 3.5 × 107V / W, and response time τ≤4.12 × 10-7s.