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研制了具有约瑟夫逊弱连接行为的高TcGdBa2Cu3O7-δ双晶晶界结，并用双晶结进行光探测，用波长为0．6328μm的He－Ne激光器辐照双晶结区，系统观测了结的光响应特性，最好的结果为噪声等效功率NEP＝1．9×10－13W，归一化探测率D＝5．3×109cmHz1/2W－1，响应率Rv＝4．2×107V／W，响应时间τ=4.35×10-7s。
A high TcGdBa2Cu3O7-δ twin junction with Josephson weak connection was developed. The twin junction was used for photodetection. The twin junction was irradiated by a He-Ne laser with a wavelength of 0.6328μm. The junction was observed Response characteristics, the best results for the noise equivalent power NEP = 1.9 × 10-13W, the normalized detection rate D = 5.3 × 109cmHz1 / 2W-1, the response rate Rv = 4.2 × 107V / W , The response time τ = 4.35 × 10-7s.