Optical Components for Communications
Principles and Applications
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Open AccessUltra-thin Ag/Si heterojunction hot-carrier photovoltaic conversion Schottky devices for harvesting solar energy at wavelength above 1.1 µm
Traditional silicon solar cells can only absorb the solar spectrum at wavelengths below 1.1 μm. Here we proposed a breakthrough in harvesting solar energy below Si bandgap through conversion of hot carriers ge...
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Open AccessApplication of Silicon Nanostructure Arrays for 6-inch Mono and Multi-Crystalline Solar Cell
In this study, we fabricate uniform silicon nanowire (SiNW) arrays on 6-inch mono- and multi-crystalline wafers by employing the improved solution-processed metal-assisted chemical etching (MacEtch) method. Fu...
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Chapter
Solar Cells
This chapter introduces solar cells. The depletion of fossil energy and dramatic change of weather leads to the attention of renewable energies. Solar energy is one of the important choices among them. Solar c...
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Open AccessEnvironmentally Benign Technology for Efficient Warm-White Light Emission
Nowadays efficient down conversion for white light emission is mainly based on rare-earth doped phosphors or cadmium-containing quantum dots. Although they exhibit high luminescence efficiency, the rare-earth ...
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Article
Forming extremely smooth ZnO thin film on silicon substrates for growth of large and well-aligned ZnO rods with the hydrothermal method
Sol–gel zinc oxide (ZnO) thin films generally have non-uniform stripes. After annealing at high temperatures, these thin films are rough and granular. When ZnO rods are grown on such rough and non-uniform surf...
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Electroluminescence and Spectral Shift of CdS Nanoparticles on Si Wafer
Preparation of CdS nanoparticles, devices fabrication, and electroluminescence properties at room temperature of CdS nanoparticles on silicon substrates are reported. A spectral shift of 86-meV of free exciton...
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Book
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Chapter
Introduction to Optical Communication
In the 21st century, when people talk about optical communication, they are usually referring to optical fibers. In fact, optical communication has been used for thousands of years although optical physics were n...
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Transmitter (II) --- Modulators
The signals transmitted in the optical communication system are carried by light. Therefore, the function of a transmitter is to convert the electronic signals to optical signals in which signals are carried b...
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Photodetectors and Detection of Optical Radiation
When optical signals transmitted in optical fiber arrive at the destination, they have to be converted to electronic signals. Photodetectors are used for this purpose.1, 2 The converted electronic signals are the...
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Passive Components (I)
With the knowledge of the optical principles used for passive components, we can now easily understand how passive components are built to perform the functions required by optical communications. In this chap...
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Transmitters (I) --- Light Sources
In an optical communication system, what is transmitted in the system is light that in turn carries signals. Therefore, the light source is a key component for optical communication systems. In this chapter, w...
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Optical Amplifiers
Optical communication systems are now widely spread over the entire earth. The world-wide link of optical fibers for signal transfer is more than 10,000 km. Even though the loss of optical fibers is as low as ...
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Principles of Optics for Passive Components
In a fiber optic communication system, many different optical components are used. In previous chapters, we discussed active components, which are used for three purposes:
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Chapter
Passive Components (II)
With an understanding of the basic passive components provided by previous chapters, we can now study the more complex passive components. They are often formed from the basic passive components. Those complex...
