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A Systems Approach for Analyzing Uncertainties in Misalignment of a Fiber-Optic System

[+] Author Affiliations
Satish Radhakrishnan, Ganesh Subbarayan

Purdue University, West Lafayette, IN

Luu Nguyen, William P. Mazotti

National Semiconductor Corporation, Santa Clara, CA

Paper No. IMECE2003-42667, pp. 487-493; 7 pages
  • ASME 2003 International Mechanical Engineering Congress and Exposition
  • Electronic and Photonic Packaging, Electrical Systems and Photonic Design, and Nanotechnology
  • Washington, DC, USA, November 15–21, 2003
  • Conference Sponsors: Electronic and Photonic Packaging Division
  • ISBN: 0-7918-3714-9 | eISBN: 0-7918-4663-6, 0-7918-4664-4, 0-7918-4665-2
  • Copyright © 2003 by ASME


Performance of a fiber-optic system depends on the coupling efficiency and the alignment retention capability. The optoelectronic system experiences performance degradation due to uncertainties in the alignment of the optical fibers with the laser beam. The laser devices are temperature sensitive, generate large heat fluxes, are prone to mechanical stresses induced and require stringent alignment tolerance due to their spot sizes. The performance of an optoelectronic system is also affected by many other factors such as geometric tolerances, uncertainties in the properties of the materials, optical parameters such as Numerical Aperture etc. To analyze such a complex system, we need to understand the dependence and inter-relationships between various elements that together make the complex system. In this paper, we develop systematic, formal procedures for identifying the relationships between the critical system level parameters through system decomposition strategies. A novel technique to include the sensitivity of the variables with respect to the functions to assist in the system decomposition is developed. We apply graph partitioning strategies to decompose the system into different subsystems. We also demonstrate system decomposition technique using a simple to implement simulated annealing algorithm. The results of system decomposition using graph partitioning technique and simulated annealing are also compared.

Copyright © 2003 by ASME
Topics: Fibers



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