1,721,159 research outputs found
Wavelength sensitive device for wavelength stabilization
No full textA device for stabilizing the operating wavelength () of an electro-optical component having a nominal operating wavelength (0) by a wavelength influencing circuit adapted to be driven by a control signal. The device comprises a semiconductor photodiode adapted to be impinged upon by the radiation generated and/or processed by the component and to generate an output signal which is indicative of a difference of the wavelength of the radiation (() with respect to the nominal operating wavelength (0, i). The semiconductor photodiode includes a plurality of layers jointly defining two opposite diodes generating opposite photocurrents as a result of radiation impinging onto the photodiode. The opposite photocurrents are adapted to generate the control signal to effect the stabilization action
The role of galactose fermenting yeasts in plain yogurt spoilage
No full textThe role of galactose fermenting yeasts in plain yogurt spoilag
Si based optoelectronics for communications
No full textSi based optoelectronic devices have recently successfully entered the market of optical communications, This fact is stimulating renewed efforts in the design of optoelectronic components based on the well-established Si technology. In this paper, the motivations supporting these efforts and the major obstacles to be overcome are presented. Moreover, an overview of the state of the art of different classes of silicon based optoelectronic devices (waveguides, detectors, light sources etc.) is given. (C) 2002 Elsevier Science B.V. All rights reserved
Importanza dello studio della dinamica della via escretrice nella diagnosi e nella terapia della tubercolosi urinaria.
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