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Temperature Dependence of Sensitivity of Avalanche Photodiode Based Optical Receiver

Temperature Dependence of Sensitivity of Avalanche Photodiod...

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2006 10th International Conference on Communication Technology（ICCT 2006）

作者： ales prokes Institute of Radio Electronics Brno University of Technology Brno Czech Republic

In the paper, the temperature dependence of the sensitivity of an avalanche-photodiode-based receiver applied in the free space optical communication link is discussed. Communication systems of this type are exposed to a wide range of operating temperatures, which markedly affect many photodiode and preamplifier parameters. The paper describes receiver sensitivity calculation, taking into consideration the temperature dependence of avalanche photodiode gain, excess noise factor, dark current and thermal noise of preamplifier resistances. Presented calculation is demonstrated on the connection of a small-area silicon APD operating in the wavelength range from 820 to 1150 nm with a transimpedance preamplifier using a bipolar junction transistor.

关键词： Temperature dependence Avalanche photodiodes Optical receivers Preamplifiers Optical noise Optical fiber communication Temperature distribution Temperature sensors Dark current Thermal factors

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自动化中的液压机构

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1992年

作者：约瑟夫·普罗克斯(Josef prokes)

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INFLUENCE OF CLODRONATE ON THE BONE DENSITY OF PATIENTS WITH MULTIPLE MYELOMA-THREE-YEAR FOLLOW-UP OF THE THERAPEUTIC EFFECT.

INFLUENCE OF CLODRONATE ON THE BONE DENSITY OF PATIENTS WITH...

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The Third International Congress on Osteoporosis

作者： Klivanova A. Fojtik Z. Adam Z. prokes B. Znojil V. Hajek R. Krejei M. Doubek M. Vorlieek J. Ilnd Onco-Hematology Dpt.UniversityHospital Brno Bohunice.CZ

Bisphosphonates are used for the treatment of hypercalcaemia as well as in normocalcaemic patients for the long-term inhibition of malignant osteolytic bone *** patients with multiple myelomas treated with bisphosphonates in randomized studies a reduction of the number of new osteolytic foci was proved and also improvement of the quality of life was *** objective of presented study was the evaluation of the effect of clodronate on the increase of bone density in patients with multiple myeloma. Since 1994 34 patients(pts)were included in the *** results were evaluated in January *** the 1year the patients were given 1000 mg ***(Bonefos - Leiras)per month,further years 1800 mg per month(Peest et al.).Bone marrow density(BMD)in the lumbar vertebrae was evaluated by CT densitometry in six months intervals. Statistical testing of trends of assessed bone density values revealed that not even after three years of the disease a statistically significant reduction of the bone density occurs.

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