在晶界夹角为２４°的Ｚｒ（Ｙ）Ｏ２人工双晶基片上制备高温超导双晶Ｇｄ－Ｂａ２Ｃｕ３Ｏ７－δ薄膜，用光刻技术在晶界上刻出１０×１０ｍ２的双晶晶界结，它与外电路一起构成光探测器。在８０Ｋ用Ｈｅ－Ｎｅ激光和５００Ｋ黑体作为辐射源测量了光探测器的响应特性。探测结果：噪声等效功率ＮＥＰ分别为６．７×１０－１４和３．８×１０１４ＷＨｚ－１／２，归一化探测率分别为１．４×１０１０和２．６×１０１０ｃｍＨｚ１／２Ｗ－１；响应度分别为１．８×１０７和３．２×１０７ＶＷ－１。 A high-temperature superconducting twinned Gd-Ba2Cu3O7-δ thin film was prepared on a Zr (Y) O2 artificial twin substrate with an included angle of 24 °. A double crystal grain boundary of 10 × 10 m2 was engraved on the grain boundary by photolithography Knot, which together with the external circuit constitutes a light detector. The response characteristics of the photodetector were measured at 80K using a He-Ne laser and a 500K blackbody as a radiation source. The detection results: The noise equivalent power NEP was 6.7 × 10-14 and 3.8 × 1014WHz-1/2 respectively, and the normalized detection rates were 1.4 × 1010 and 2.6 × 1010cmHz1 / 2W-1 ; Responsivities were 1.8 × 107 and 3.2 × 107VW-1 respectively.