Be wary of the multiple definitions of the term "numerical aperture".In this case, the fiber mode is significantly smaller than the physical aperture The fiber mode we propagate through this system can be clipped by this physical aperture. This means that the system aperture is set by the physical aperture of the lens. The system aperture is set using “ float by stop size” on the rear face of the first lens.Again, this distance will be computed by rigorous optimization later The separation of the two lenses is set to 2 mm, as this is the experimental distance used.Since the lenses and fibers are identical (within manufacturing tolerances), the optical system should work either way round, and should therefore by symmetric A pick-up solve is used to make the final lens-image thickness the same as the initial object-lens image.This number is to be computed by the optimization routine later The object/lens and lens/image distance has been set by hand to 0.1 mm as this is approximately the right value.The file “single mode coupler.zmx” in Article Attachments shows how to implement this system. Microlens Array, SUSS MicroOptics SMO399920 2 This article describes a commercial fiber coupler, which couples two pieces of Corning SMF-28e Fiber using SUSS MicroOptics FC-Q-250 microlens arrays. Reinhard Voelkel of Suss MicroOptics SA for the experimental data used in this article. Accounting for losses due to partial reflection and material absorption is also discussed.
This article demonstrates how to set up a coupling system and examines the multiple tools available in Sequential Mode for beam and fiber coupling analysis, including Paraxial Gaussian Beam Propagation, Single-Mode Fiber Coupling, and Physical Optics Propagation. Simulation of single-mode fiber coupling efficiency is handled well by OpticStudio Sequential Mode. This article demonstrates the use of several fiber coupling efficiency analyses in OpticStudio.Īuthored By Mark Nicholson, Kristen Norton Downloads Accurate analysis of coupling efficiency is critical in the design of fiber coupling systems.
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