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  • 1
    Electronic Resource
    Electronic Resource
    Astigmatically compensated cw dye laser resonators using lenses (1978)
    Springer
    Applied physics 15 (1978), S. 157-161 
    Details
    ISSN: 1432-0630
    Keywords: 42.55 M ; 42.60 D
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract The compensation of the astigmatism of Brewster-angled dye cells can be performed with lenses as well as with spherical mirrors. The advantages of cw dye laser resonators using lenses lie in the linear configuration of the optics and the convenient adjustability of astigmatism compensation. An output efficiency of 30% already at 1.6W pumping power has been observed. In addition, ring laser resonators with lenses have been investigated and they delivered up to 400 mW single mode power in travelling wave operation at less than 2 W pumping power.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00928201
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    A 4×1 GHz Array Acousto-Optical Spectrometer (1999)
    Springer
    Experimental astronomy 9 (1999), S. 17-38 
    Details
    ISSN: 1572-9508
    Keywords: Radio Astronomy ; Array Systems ; Acousto-Optical Spectrometer ; Back-ends ; Radiometers ; Heterodyne Instrumentation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract In this paper an array acousto-optical spectrometer (AOS) with four 1 GHz bands and a frequency channel spacing of 1 MHz is presented. A discussion about the requirements which have to be fulfilled by the presented instrument for applications in radio astronomy is given as well as e detailed description of the optical design. Remarkable test results have been achieved such as an Allan-Variance minimum time of about 1000 s, identical noise performance, and identical frequency calibration of all bands. The reproducibility of measurements has been demonstrated by tests with CH3CN, using an absorption cell. The question of the maximum number of bands per array AOS is discussed. Although it may seem promising to increase the number of bands per optical unit to e.g. eight or more instead of four, a strong limitation has been found due to the increasing r.f. power level on the Bragg cell which affects the baselines of the spectra.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008093310165
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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