Optical coupling and alignment tolerances in optoelectronic array interface assemblies
- 19 November 2002
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- p. 577-583
- https://doi.org/10.1109/ectc.1995.515341
Abstract
A novel analytic beam propagation approach to multimode coupling modeling is presented which models mode power and phase distributions from first principles (unlike ray-tracing.) Coupling between axially misaligned multimode fibers has been simulated and compared with measurements. The relationships between optical coupling and fabrication and assembly tolerances have been studied for a generic laser diode array-to-optical fiber array coupler. Sources for lateral and transverse misalignment have been identified and related to variations in micromachining, components, assembly and thermo-mechanical stresses. Assessment of these misalignment sources leads to worst case laser diode-to-optical fiber transverse and lateral misalignments of approximately 2.8 /spl mu/m for single-mode coupling and 4.1 /spl mu/m for multimode coupling. These values indicate that this laser array interface, in its present form, is suitable for multimode fibers but not single-mode fibers.Keywords
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