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  • 42.20  (1)
  • 78.20.Ci  (1)
  • Bio-optics (effects of microwaves, light, laser and other electromagnetic waves)  (1)
  • Springer  (3)
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  • Springer  (3)
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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Applied physics 58 (1994), S. 439-442 
    ISSN: 1432-0649
    Keywords: 42.20 ; 42.70
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We develop an approximate analysis based on the effective-index method to obtain the universal chart of the normalized parameters describing the mode dispersion of a two-dimensional diffused-channel wave-guide with an erfc-Gaussian index profile. We have shown that the Gaussian can well be approximated by an hyperbolic-secant-squared profile and we have compared our results with those obtained by using the effective-index method.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Applied physics 58 (1994), S. 133-135 
    ISSN: 1432-0649
    Keywords: 78.20.Ci ; 42.70.Ce
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We present and discuss a technique to measure concurrently the temperature dependence of quartz refractive indices in the thermal range 25–300° C. The magnitude of both indices is found to decrease slightly with increasing temperature in the thermal range considered.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Il nuovo cimento della Società Italiana di Fisica 10 (1988), S. 173-182 
    ISSN: 0392-6737
    Keywords: Bio-optics (effects of microwaves, light, laser and other electromagnetic waves)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Description / Table of Contents: Riassunto Si presenta un modello matematico per calcolo dell'intensità della radiazione nei tessuti biologici esposti a radiazione laser. L'equazione del trasporto radiativo indipendente dal tempo è risolta con la serie di Neumann. Ogni termine della serie rappresenta ordini di grandezza differenti dell'effetto di scattering interno. Questi effetti divengono importanti durante l'irraggiamento con laser ad argon e ND: YAG utilizzati in applicazioni mediche per la coagulazione e l'incisione. Il modello è in accordo al primo ordine con il termine di scattering singolo.
    Abstract: Резюме Предлагается математическая модель для вычисления интенсивности излучения в биологических тканях, подверженньх лазерному облучению. С помощью рядов Неймана решается не зависящее от времени уравнение переноса излучения. Каждый член ряда связан с различным порядком величнины эффекта внутреннего рассеяния. Определяется важность эффектов многократного рассеяния при облучении ион-аргоновым лазером и ND: YAG лазером, которые ирользуются как инструменты коагуляции или резания в хирургии. Показывается, что процесс взаимодействия соответствует картине однократного рассеяния.
    Notes: Summary A mathematical model is presented for the computation of intensity of radiation in biological tissues irradiated by laser. The time-independent transport radiative equation is solved in terms of a Neumann series. Each term of the series is associated with a different order of magnitude of the internal-scattering effect. The importance of these effects has been recognized during the irradiation by ion-argon and ND: YAG laser used as coagulting or cutting instruments in surgery applications. Agreement is found with the single-scattering picture.
    Type of Medium: Electronic Resource
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