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Diseño, implementación y caracterización de un foto-receptor para sistemas de transmisión de señales de radiofrecuencia a través de fibra óptica empleando un mezclador optoelectrónico
| Content Provider | Semantic Scholar |
|---|---|
| Author | Vargas, Mario |
| Copyright Year | 2007 |
| Abstract | of the thesis presented by Mario Alonso Chávez Vargas as a partial requirement to obtain the MASTER OF SCIENCE degree in ELECTRONICS AND TELECOMMUNICATIONS. Ensenada, Baja California, Mexico. November 2007. “Design, implementation and characterization of a photoreceiver for radio frequency transmission systems over optical fiber employing an optoelectronic mixer” Abstract approved by:approved by: Dr. Arturo Arvizu Mondragón Dr. J. Apolinar Reynoso Hernández Thesis Co-director Thesis Co-director The optical communication techniques are a cost effective approach for the radio frequency signals (RF) distribution, where the baseband (BB) or intermediate frequency signal (IF) is used to modulate an optical source. The resulting optical signal is then carried over an optical fiber link to the remote station, where the data is photodetected and upconverted. This architecture is known as radio-over-fiber (RoF) technology. Moreover, pseudomorphic high electron mobility transistors (PHEMT’s) may be used as optoelectronic mixers (OEM). This device has several advantages in RoF applications because with its use it is possible to carry out local oscillation, photodetection and upconversion simultaneously; furthermore it can provide a microwave isolation which it is not possible in a conventional microwave mixer. This thesis is related with the self-oscillating optoelectronic mixers application in RoF systems. We have implemented two mixers using: a) InP PHEMT as an active device in order to perform a 1.55 μm light photodetection; b) GaAs PHEMT as an active device in order to perform a 0.85 μm light photodetection. We reported the results of the electrooptical transistor characterization. The curves obtained under dark conditions are used to choose the optimal self-oscillating optoelectronic mixer bias point; and the curves obtained under illuminated conditions show the performance of the photocurrent device (IPH). On the other hand, the polarization dependence of the photocurrent is experimentally demonstrated. The experimental results show wide mixing ranges over the 5 GHz band. Additionally, the self-oscillating optoelectronic mixer is capable to up-convert a 2 GHz IF signal in spite of the transconductance values of the PHEMT’s that were used in this work. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://cicese.repositorioinstitucional.mx/jspui/bitstream/1007/1874/1/177961.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
