Diagnosis of modal and chromatic dispersions for the LP01 and LP11 modes through temporal decomposition by means of Fourier transform
| Autor: | Masaharu Ohashi, Kazuhiko Aikawa, Nori Shibata, Ryo Maruyama, Kimitaka Watanabe |
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| Rok vydání: | 2020 |
| Předmět: |
Physics
White light interferometry business.industry Fast Fourier transform 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Measure (mathematics) Atomic and Molecular Physics and Optics 010309 optics symbols.namesake Optics Modal Fourier transform Differential group delay 0103 physical sciences Dispersion (optics) symbols Chromatic scale 0210 nano-technology business |
| Zdroj: | Optics Letters. 45:4750 |
| ISSN: | 1539-4794 0146-9592 |
| DOI: | 10.1364/ol.396444 |
| Popis: | We provide a novel approach for estimating the modal and chromatic dispersions of the L P 01 and L P 11 modes traversing a two-mode fiber (TMF). A modal interferometer is used to measure the differential group delay (DGD) and chromatic dispersion for the two modes in the 1260–1360 nm telecommunication band. The measurement principle is based on an investigation of a transmitted spectrum through temporal decomposition by means of a Fourier transform. The diagnosis of the DGD and chromatic dispersion for the two modes is discussed theoretically and experimentally. The experimental results obtained here exactly match those obtained previously. The salient feature of the present method is that the modal interferometer configuration makes it possible to measure both the DGD and chromatic dispersion and also estimate the shape of optical pulses traversing a TMF. |
| Databáze: | OpenAIRE |
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