By Topic
Skip to Results

Search Results

You Refined by
Topic: Photonics & Electro-Optics  Remove   
7 Results returned
Skip to Results
  • Save this Search
  • Download Citations Disabled
  • Save To Project
  • Email
  • Print
  • Export Results
  • Full text access may be available. Click article title to sign in or learn about subscription options.

    Tunable Semiconductor Lasers

    Buus, Jens
    Publication Year: 2006

    IEEE eLearning Library Courses

    This course describes the state-of-the-art of tunable lasers, tunable laser technologies and control of tunable lasers. It also includes a brief introduction to the basics of semiconductor lasers, as well as background on DFB lasers, in particular how a grating works as a wavelength selective element in DFB and DBR lasers. Tuning mechanisms and tuning properties will be described, and the operation of modified structures with extended tuning range will be explained, including sampled gratings and super structure gratings. The properties of codirectional couplers and the use of these in tunable lasers will be discussed. Devices such as external cavity lasers, wavelength selectable lasers, and tunable VCSELs, will also be described. Throughout the course numerous examples of laser structures from the recent technical literature will be presented. Practical issues such as characterization, operation, and control of tunable lasers, as well as switching speed and reliability, will be included. View full abstract»

  • Full text access may be available. Click article title to sign in or learn about subscription options.

    Optoelectronic Devices for Fiber Optics

    Campbell, Joe C.
    Publication Year: 2005

    IEEE eLearning Library Courses

    This course provides an introductory, tutorial-type overview of key optoelectronic devices for optical communication systems, specifically, semiconductor lasers, photodetectors, optical modulators, and some WDM components. The course covers a broad range of devices with an emphasis on fundamental device physics and operating principles. Important performance parameters including design tradeoffs will also be discussed. The laser section will discuss applications and the types of lasers that are utilized for specific systems. Topics include multiple quantum well lasers, distributed feedback lasers, wavelength tunable lasers and vertical cavity surface emitting lasers. Photodetector topics will cover wide-bandwidth PINs and avalanche photodiodes as well as receivers with optical preamplification. State-of-the-art integrated receiver circuits will also be discussed. In the modulator section Mach-Zehnder interferometers, and quantum-confined-Stark-effect devices will be covered. There will be a brief description of recent developments in optical switching using MEMs technology. View full abstract»

  • Full text access may be available. Click article title to sign in or learn about subscription options.

    Solid-State Lighting

    Schubert, E. Fred
    Publication Year: 2005

    IEEE eLearning Library Courses

    This course presents an introduction as well as reference materials for professionals working in solid-state lighting. Course materials include the operating principles, device physics, fabrication, and applications of light-emitting diodes. Course materials also include a detailed discussion of daylight illumination sources, planckian sources, human vision, eye sensitivity, photometric and radiometric quantities, and color rendering capabilities of light sources. After completing this course you should be able to develop and understanding of: The operating principles of light-emitting diodes; The principles of human vision, planckian sources, photometric and radiometric quantities, color rendering, and the color-rendering index; Areas for present and future applications of solid-state lighting devices. View full abstract»

  • Full text access may be available. Click article title to sign in or learn about subscription options.

    Optical Wavelength Division Multiplexing (WDM) Networks and Technology

    Kartalopoulos, Stamatios
    Publication Year: 2005

    IEEE eLearning Library Courses

    Dense Wavelength Division Multiplexing (DWDM) is a photonic technology that is able to increase the number of wavelengths in the same fiber, thus achieving higher aggregate bandwidth that exceeds 1 Tbit/s. Currently, WDM technology is considered the only optical communications technology for the present and future to be deployed in access as well as long-haul and ultra-long haul applications and in various network topologies. WDM is made possible by new photonic technology that brought to bear new photonic components. Among them are optical filters, modulators, gratings, optical amplifiers, couplers, splitters, optical add-drop multiplexers (OADM), optical cross-connects, tunable lasers, superfast and sensitive photodetectors, optical switches, polarizers, compensators and equalizers and new improved fiber. This tutorial identifies the photonic phenomena that determine the bounds of photonic transmission and countermeasure strategies, DWDM principles, optical components, systems and networks. View full abstract»

  • Full text access may be available. Click article title to sign in or learn about subscription options.

    Dynamically Adaptive Power Supply Circuits for Radio-Frequency (RF) Power Amplifier (PA) Applications

    Rincón-Mora, Gabriel
    Publication Year: 2006

    IEEE eLearning Library Courses

    The role of Radio-Frequency (RF) Power Amplifiers (PAs) in today's and tomorrow's consumer and state-of-the-art electronics is crucial, catering to the stringent performance (i.e., linearity and output power) and real-estate (i.e., size) requirements of portable systems and the power limitations of battery-powered applications. Key to the success of any portable device is battery life (or runtime), and PAs can be a significant and detrimental load in this regard, especially because they capture a significant portion of the total power budget and they characteristically have poor power efficiencies. This course will address the advent of dynamically adaptive biasing schemes in PA applications to increase power efficiencies, which is generally done by essentially transforming and redefining the operating environment of the PA for maximum performance at optimum power levels, and consequently prolonging battery life. After completing this course you should be able to develop an understanding of dynamically adaptive biasing schemes in PA applications. View full abstract»

  • Full text access may be available. Click article title to sign in or learn about subscription options.

    Introduction to Fiber Optics

    Jacobs, Ira
    Publication Year: 2005

    IEEE eLearning Library Courses

    This course provides an overview of fiber optic communications technology and applications. It assumes some general technical background in telecommunications, but no prior knowledge of fiber optics. The basic components of an optical fiber communication system include the transmitter (laser and LED), the fiber (multimode, single mode, dispersion-shifted) and the receiver (PIN and APD detectors, coherent detectors, optical preamplifiers, receiver electronics). These technologies are defined, their basic operating principles summarized, key parameters affecting system performance identified, and representative values given for both practical systems and current research results. Factors affecting application (both point-to-point and networking) are identified. Emphasis is on physical principles, performance limits, and technology and application directions. View full abstract»

  • Full text access may be available. Click article title to sign in or learn about subscription options.

    Introduction to Optical Fiber Communication Systems

    Willner, Alan
    Publication Year: 2007

    IEEE eLearning Library Courses

    As point-to-point links become more sophisticated, single-channel and WDM systems must dynamically adapt to changing environmental and traffic conditions in order to avoid SNR degradation. This scenario erupts into a much greater challenge when channels originate at different locations, as is the case with add/drop multiplexers, reconfigurable cross-connects, circuit-switched networking, and, eventually, optical packet switching. This course is intended for people interested in non-static and reconfigurable WDM systems and networks. View full abstract»

Skip to Results

SEARCH HISTORY

Search History is available using your personal IEEE account.