High-speed optical detectors in YBCO films with non-granular and fine-grain morphologies

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Tang, Q. and Driessen, A. and Hilderink, L.H. and IJsselsteijn, R.P.J. and Flokstra, J. and Popma, Th.J.A. (1993) High-speed optical detectors in YBCO films with non-granular and fine-grain morphologies. IEEE Transactions on Applied Superconductivity, 3 (1, Par). pp. 2864-2868. ISSN 1051-8223

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Abstract: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 μm×10 μm. 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 65-ns-pulsewidth diode laser.
Item Type:Article
Copyright:© 1993 IEEE
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Science and Technology (TNW)
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Link to this item:http://purl.utwente.nl/publications/24192
Official URL:http://dx.doi.org/10.1109/77.233999
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Metis ID: 128992