A geometrical optics approach to encircled-flux compliant source modeling for multi-mode fiber illumination and connection attenuation
| Autor: | S.J. Floris, Bastiaan P. de Hon, Rutger Wilhelmus Smink, Ton Bolhaar |
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| Přispěvatelé: | Electromagnetics, Electromagnetic and multi-physics modeling and computation Lab |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Optical fiber
Astrophysics::High Energy Astrophysical Phenomena 02 engineering and technology 01 natural sciences law.invention 010309 optics Speckle pattern 020210 optoelectronics & photonics Optics law 0103 physical sciences Connection 0202 electrical engineering electronic engineering information engineering Electrical and Electronic Engineering Invariant (mathematics) Instrumentation Source modeling Physics Multi-mode optical fiber Geometrical optics business.industry Attenuation Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Modal Control and Systems Engineering Encircled flux business |
| Zdroj: | Optical Fiber Technology, 54:102116. Academic Press Inc. |
| ISSN: | 1068-5200 |
| Popis: | We construct ray-based encircled-flux compliant sources for multi-mode optical fiber launches using classic geometrical optics. In particular, we make an LP-mode conforming launch that excites only guided rays by distributing the β ¯ ray invariant according to a (scaled) counterpart of the modal power distribution of LP-modes. Propagation of the ray distribution is spatially stable and simulations of attenuation due to fiber connections and 1 mm far-field behavior using this source agree well with measurements. We caution against models that configure ray positions and ray directions independently and show that they are prone to produce unstable ray distributions. Lastly, we show that modal noise due to laterally misaligned fibers can be replicated using geometrical optics by configuring our LP-mode conforming sources to match the radial power distribution of 3000 vectorial full-wave spatio-temporal coherent speckle patterns. |
| Databáze: | OpenAIRE |
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