19 Result(s)
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Chapter
Horst Zimmermann
Microwaves, RF and Optical Engineering
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Chapter
Post Amplifiers
The output signal from the TIA is in the range of a few millivolts and more gain is needed to reach at least an amplitude of 200 mV required by the decision circuit. This additional gain will be introduced by ...
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Why Optoelectronic Circuits in Nanometer CMOS?
Highly integrated communication systems are required to fulfill the growing demand for higher data rates in telecommunication networks. The optical fiber links are the best candidates to deal with large volume...
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Laser and Modulator Drivers
The main elements of an optical transmitter are the devices used for the electrical to optical conversion (laser, VCSEL, modulator ...) and the circuit which drives the laser diode (laser driver or modulator d...
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Discrete Photodiodes
Low production costs are important for large volume production. For POF communications large-area PDs are needed which will increase the chip costs if integrated in the same expensive nanometer CMOS technology.
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Basics of Photodiodes
The integrated photodiode is the first stage in the monolithically integrated optical receiver. The photodiode converts the optical power into an electrical current. The photodiode should convert photons into ...
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Optoelectronic Circuits in Nanometer CMOS Technology
In this chapter three fully integrated optical receivers down to 40 nm CMOS are described. In addition two optical receivers with off-chip photodiode follow. Finally optical sensors are introduced to complete ...
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Integrated Photodiodes in Nanometer CMOS Technologies
This chapter contains aspects like technology selection and scaling of photodiode performance. Classical PN junction, double-junction photodiodes, finger photodiodes, PIN photodiodes, a spatially modulated lig...
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Equalizers
Most of the nanometer CMOS photodetectors presented in Chap. 5 have a small bandwidth due to a slow diffusion current. The photodiodes’ bandwidth can be extended t...
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Optical Communications Fundamentals
The necessary fundamentals for the analysis and design of optical communication links will be introduced in this chapter. The transmitter, receiver (transceiver) and optical fiber channel for optical communica...
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Transimpedance Amplifiers
Current-to-voltage converters are necessary in optical in order to convert and amplify the weak delivered by the into a strong output voltage signal which is proportional to the input current.
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Multilevel Signaling
The use of multilevel signaling has applications in increasing the information bandwidth over optical fiber link, thus obviating the necessity to replace cable whose capacity is fully utilized at a given bit r...
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Transimpedance Amplifier
Photodiodes do not use any amplification effect and have responsivity (ratio of output current to input light intensity) that is for example ≤0.5 A/W for a silicon photodiode at a light wavelength of 650 nm. T...
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Equalizer Implementations for SI-POF
In this chapter we introduce optical receivers with POF equalizers to enhance the performance for giga-bit communication over SI-POF. A single-chip fully integrated optical receiver with an integrated POF-equa...
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Introduction
The increasing demand for broadband services raises the need for a high bandwidth link which should extend from the terminals to the customer’s premises. In-building networks presently are using a wide range o...
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Equalization Techniques
The term equalization can be used to describe any circuit or signal processing operation that minimizes ISI. The purpose of an equalizer is to reduce ISI as much as possible to minimize the probability of wron...
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Integrated Photodiode
The integrated photodiode is the main component and the first stage in the integrated optical receiver. The photodiode converts the optical power into an electrical current. The photodiode should convert photo...
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Conclusions
The standard PMMA SI-POF is very attractive for use in short-range communication and in-building networks. Due to modal dispersion, the SI-POF’s bandwidth is small and limits the maximum data rate which can be...
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High-Speed Transmission over Step-Index PMMA Plastic Optical Fibers
Polymer Optical Fibers based on Poly-Methyl-Methacrylate with step index 1 mm core diameter have gained interest in the recent years for their interesting properties compared to glass optical fibers (GOF).
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Integrated Optical Receiver and Multilevel Transmission over PMMA SI-POF
Optical absorption in a semiconductor material is the key-effect to convert optical power into an electrical current. This conversion is done by an integrated photodiode in the integrated optical receivers int...
