Sökning: "uncooled"

Visar resultat 1 - 5 av 15 avhandlingar innehållade ordet uncooled.

  1. 1. Efficient 1.3 mm GaInNAs Quantum Well Lasers for Uncooled, High Speed Operation

    Författare :Yongqiang Wei; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; semiconductor laser; uncooled; temperature dependence; modulation; quantum well; molecular beam epitaxy; high speed; GaInNAs;

    Sammanfattning : The rapid expansion of tele and data transmission systems requires an ever increasing capacity in modern optical fibre communication networks. With the implementation of short distance, high density networks, such as access networks, there is a need for cost-effective optical transmitters compatible with single mode fibres. LÄS MER

  3. 2. Micromachined epitaxial colossal mognetoresistors for uncooled infrared bolometer

    Författare :Joo-Hyung Kim; Alexander M. Grishin; Yael Nemirosky; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; La0.67 Sr; Ca 0.33MnO3 LSCMO ; La0.67Sr0.33MnO3 LSMO ; Electrophysics; Elektrofysik;

    Sammanfattning : High quality perovskite manganites, La1-xAxMnO3 (A = Ca, Sr, Ba) are very attractive materials due to their great application potential for magnetic memory, uncooled infrared (IR) microbolometer and spintronics devices. This thesis presents studies of the growth and material characterization (including structural, electrical, magnetic and noise) of epitaxial manganite films on Si and GaAs. LÄS MER

  4. 3. Electrical Noise in Colossal Magnetoresistors and Ferroelectrics

    Författare :Alvydas Lisauskas; KTH; []
    Nyckelord :low frequency noise; colossal magnetoresistance; uncooled bolometer; relaxations and electrical fluctuations in ferroelectrics;

    Sammanfattning : .... LÄS MER

  5. 4. Low frequency noise in thin film colossal magnetoresistors

    Författare :Alvydas Lisauskas; KTH; []
    Nyckelord :Low frequency; Noise; Colossal magnetoresistance; Uncooled bolometer;

    Sammanfattning : .... LÄS MER

  7. 5. High performance materials and processing technology for uncooled 1.3 μm laser diodes

    Författare :Roberta Campi; Gunnar Landgren; Abdallah Ougazzaden; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; MOCVD; InGaAsP; AlGaInAsP; AlGaInAs; In-situ etching; TBCI; Semiconductor physics; Halvledarfysik;

    Sammanfattning : This thesis investigates different material systems and processing technology for high temperature compatible laser diodes used in volume applications within the 1.3-μm telecom wavelength window. LÄS MER