Differential mode delay (DMD) in graded-index multimode fiber: effect of DMD on bandwidth tuned by restricted launch conditions
- The bandwidth behavior of graded-index multimode fibers (GI-MMFs) for different launching conditions is investigated to understand and characterize the effect of differential mode delay. In order to reduce the launch-power distribution the near field of a single-mode fiber is used to produce a controlled restricted launch. The baseband response is measured by observing the broadening of a narrowThe bandwidth behavior of graded-index multimode fibers (GI-MMFs) for different launching conditions is investigated to understand and characterize the effect of differential mode delay. In order to reduce the launch-power distribution the near field of a single-mode fiber is used to produce a controlled restricted launch. The baseband response is measured by observing the broadening of a narrow input pulse (time-domain measurement). The paper verifies the degradation in bandwidth due to profile distortion by scanning the spot of the single-mode fiber with a transversal offset from the center of the test sample. In addition, the impact of the launch-power distribution tuned by different spot-size diameters is demonstrated. Measurements were taken on ‘older’ 50-μm and 62.5-μm GI-MMFs as well as on laser-performance-optimized fibers more recently developed.…
Document Type: | Article (reviewed) |
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Zitierlink: | https://opus.hs-offenburg.de/6909 | Bibliografische Angaben |
Title (English): | Differential mode delay (DMD) in graded-index multimode fiber: effect of DMD on bandwidth tuned by restricted launch conditions |
Author: | Winfried LieberStaff MemberGND, Xiao Su Yi, Nisapol Nontasut, Dan CurticapeanStaff MemberGND |
Year of Publication: | 2002 |
Publisher: | Springer |
First Page: | 487 |
Last Page: | 491 |
Parent Title (English): | Applied Physics B - Lasers and Optics |
Volume: | 75 |
ISSN: | 0946-2171 |
DOI: | https://doi.org/10.1007/s00340-002-1013-6 |
Language: | English | Inhaltliche Informationen |
Institutes: | Fakultät Elektrotechnik und Informationstechnik (E+I) (bis 03/2019) |
Fakultät Medien und Informationswesen (M+I) (bis 21.04.2021) | |
Institutes: | Bibliografie | Formale Angaben |
Open Access: | Closed |
Licence (German): | Urheberrechtlich geschützt |