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  • 1
    Electronic Resource
    Electronic Resource
    Superlattice avalanche photodiodes for optical communications (1998)
    Springer
    Optical and quantum electronics 30 (1998), S. 219-238 
    Details
    ISSN: 1572-817X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract This paper reviews the research into and development trends to date of high-speed high-sensitivity semiconductor superlattice (SL) avalanche photodiodes (APDs) for use in 1.3 to 1.55μm wavelength optical communications. We focus on three types of SL-APDs based on an InAlGaAs-well/InAlAs-barrier structure. The first is an InAlGaAs/InAlAs polyimide-coated mesa-structure SL-APD with a high gain-bandwidth product of over 120GHz and a low multiplied dark current of a few tens of nano-amperes. Its reliability has been measured to be over 105h at 50°C. The second is a planar-structure SL-APD with a new titanium-implanted guard-ring; this structure has a longer lifetime than the mesa structure. The third is a large-receiving-area SL-APD integrated with a monolithic lens for eye-safety 1.5μm wavelength optical measurement systems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006958505704
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  • 2
    Electronic Resource
    Electronic Resource
    Development of Dust Removal System for Fusion Reactor (1997)
    Springer
    Journal of fusion energy 16 (1997), S. 231-236 
    Details
    ISSN: 1572-9591
    Keywords: Dust ; radioactive inventory ; removal ; monitoring
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract In the future fusion reactor, dust control may become more important for safety, than for existing fusion facilities. Some estimations show more than hundreds kg/yr dust will be generated from the plasma facing materials in the vacuum vessel. If we consider continuously operating plant, dust should be monitored and removed during the operation time. Optical monitoring methods and electrostatic removal methods are useful approaches to accomplish this. An investigation of the development of the dust removal system for a fusion reactor is reported in this paper.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1021847421360
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    Paper (German National Licenses)
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