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  • Fiber Bragg grating-tunable diode laser

    Creator:
    Ericksen, Doug
    Abstract:
    Continuously tunable diode laser sources coupled to single-mode fiber are useful sources for fiber Bragg grating (FBG) strain sensors. This paper describes the development and fabrication of such a device. An introduction is given describing applications of tunable lasers and some of the different methods of creating a tunable diode...
    Resource Type:
    Masters Thesis
    Full Text:
    emitting diode. By coupling this coated laser to a short length of single-mode fiber containing a low

  • Radiation effects in III-V compound semiconductor heterostructure devices

    Creator:
    Li, ChyiShiun
    Abstract:
    The radiation effects in III-V heterojunction devices are investigated in this thesis. Two types of heterojunction devices studied are InGaP/GaAs single heterojunction bipolar transistors (SHBTs) and GaN-based heterojunction light emitting diodes (LEDs). InGaP/GaAS HBTs are investigated for high energy (67 and 105 MeV) proton irradiation effects while GaN heterojunction LEDs...
    Resource Type:
    Masters Thesis
    Full Text:
    ) and GaN-based heterojunction light emitting diodes (LEDs). InGaP/GaAS HBTs are investigated for high

  • Design techniques for high efficiency high current LED drivers

    Creator:
    Rao, Sachin B.
    Abstract:
    Solid-state based lighting offers a number of advantages such as long life, high efficiency and compactness compared to a conventional halogen tube based lighting. Due to these advantages they are being increasingly used in a variety of lighting applications including portable devices, home, and automotive lighting. Consequently, there has been...
    Resource Type:
    Masters Thesis
    Full Text:
    . Improvements in solid-state lighting device technol- ogy have made light emitting diodes (LEDs) more efficient

  • Design techniques for high efficiency LED drivers

    Creator:
    Bang, Sarvesh Jagdish
    Abstract:
    The increasing popularity of cellular phones with integrated cameras in the recent past has led to major improvements in its image quality. However, integration of new features, such as mobile email, video streaming, MP3 etc. tend to put the limitation on image quality as camera phone designers struggle to manage...
    Resource Type:
    Masters Thesis
    Full Text:
    up to 1.2A flash light emitting diode (LED) in 500nm CMOS process is implemented. The converter