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Thermal considerations on the design and operation of lens ducts

Golnabi, H ; Sharif University of Technology | 2003

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  1. Type of Document: Article
  2. DOI: 10.1016/S0030-3992(03)00036-7
  3. Publisher: 2003
  4. Abstract:
  5. In this paper, heat effects due to powerful pump beam in the lens duct delivery system is investigated and subsequent thermal effects are described. Temperature raise in the device, thermal loading, and material considerations for the lens ducts fabrication are reported. For an absorbed intensity of 10 W/cm2 in a 4 cm-long lens duct, the temperature difference between the midpoint and its faces, for a lens duct made from borosilicate is 7.05°C, for sapphire 4.01°C, and for synthetic fused silica is the smallest value of 0.54°C. For a typical absorbed intensity of 1.4 W/cm2 in a 4 cm-long lens duct, with a steady-state time constant of 120 s, the fractional thermal loading is 1.98% for BK-7, 1.89% for sapphire, and only 0.16% for synthetic fused silica. By considering different glass materials, the overall results show that synthetic fused silica is superior to some other materials for the fabrication of a lens duct. The reported analytical method and the results of parametric studies can be helpful in material selection and construction of an effective lens duct. © 2003 Elsevier Science Ltd. All rights reserved
  6. Keywords:
  7. Construction ; Design ; Diode laser stack ; Glass material ; Lens duct
  8. Source: Optics and Laser Technology ; Volume 35, Issue 6 , 2003 , Pages 415-423 ; 00303992 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S0030399203000367