Modal Analysis of Layer-structured Optical Fibers
نویسندگان
چکیده
OF DOCTORAL DISSERTATION HELSINKI UNIVERSITY OF TECHNOLOGY P. O. BOX 1000, FI-02015 TKK http://www.tkk.fi Author Markus Hautakorpi Name of the dissertation Manuscript submitted 19.08.2008 Manuscript revised Date of the defence 01.12.2008 Article dissertation (summary + original articles) Monograph Faculty Department Field of research Opponent(s) Supervisor Instructor Abstract
منابع مشابه
Uncertainty of the Sagnac interferometer-based measurement of the modal birefringence of polarization maintaining optical fibers
Presented is an analysis of the expanded uncertainty of an indirect measurement of modal birefringence of polarization maintaining fibers, based on the Sagnac interferometer and an optical spectrum analyzer. By using this method it is easy to achieve an expanded measurement uncertainty considerably lower than 1%, at a confidence level of 0.95, in measurements of fibers, whose birefringence is i...
متن کاملModal analysis of M-type-dielectric-profile optical fibers in the weakly guiding approximation.
We study the applicability of the weakly guiding approximation (WGA) to the modal analysis of an M-type optical fiber in which a ring-shaped core lies between two uniform cladding layers. Besides being dependent on the refractive indices, the accuracy of the approximation is shown to be substantially affected by the transverse dimensions of the core. The accuracy is characterized by calculating...
متن کاملSpecialty Optical Fibers: Analysis and Characterization
This paper gives a closer insight to novel optical fibers by applying specialized numerical analysis approaches. First we have described a newly developed algorithm based on the spectral domain approach, which is employed in the analysis of multilayer optical fibers with circular symmetry. It computes the Green’s functions of the considered fiber and locates the appropriate poles, which corresp...
متن کاملRelationship of Retinal Nerve Fibers Layer Thickness with Mild Cognitive Impairment and Alzheimer's Dementia
Background and Objective: In this study, the thickness of the retinal nerve fibers layer(RNFL) was compared among patients with mild cognitive impairment, Alzheimer's dementia, and healthy individuals (controls) using Optical Coherence Tomography (OCT) device. Materials and Methods: This case-control study was conducted on 30 patients diagnosed with mild cognitive impairment and 31 healthy sub...
متن کاملModal Propagation Properties of Elliptical Core Optical Fibers Considering Stress-Optic Effects
The effect of thermally induced stress on the modal properties of highly elliptical core optical fibers is studied in this work using a finite element method. The stress analysis is carried out and anisotropic refractive index change is calculated using both the conventional plane strain approximation and the generalized plane strain approach. After considering the stress optical effect, the mo...
متن کامل