Optical detectors based on YBa2Cu3O7-δ thin films have been fabricated, which show a response time of a few ns. Typical dimensions of the active area are 10×10 μm2. No preamplifier is needed during operation. The authors report on the optical response of detectors having nongranular and fine-grain morphologies to different sources of pulsed laser radiation (e.g., mode-locked Nd:YLF laser at 1.3 μm and a GaAs diode laser at 0.9 μm). Emphasis in the study is placed on detection sensitivity for measuring short optical pulses. It is found that the best noise obtained with a fine-grain detector is on the order of 10-10 W/Hz1/2, when irradiated by the 65ns-pulse-width diode laser.
|Number of pages||5|
|Journal||IEEE transactions on applied superconductivity|
|Publication status||Published - 1993|
|Event||1992 Applied Superconductivity Conference, ASC 1992 - Chicago, United States|
Duration: 23 Aug 1992 → 28 Aug 1992
Tang, Q., Driessen, A., Hilderink, L. H., IJsselsteijn, R. P. J., Flokstra, J., & Popma, T. J. A. (1993). High-speed optical detectors in YBCO films with non-granular and fine-grain morphologies. IEEE transactions on applied superconductivity, 3(1), 2864-2868. https://doi.org/10.1109/77.233999