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Title: Modal reduction in single crystal sapphire optical fiber

Abstract

A new type of single crystal sapphire optical fiber (SCSF) design is proposed to reduce the number of guided modes via a highly dispersive cladding with a periodic array of high and low index regions in the azimuthal direction. The structure retains a “core” region of pure single crystal (SC) sapphire in the center of the fiber and a “cladding” region of alternating layers of air and SC sapphire in the azimuthal direction that is uniform in the radial direction. The modal characteristics and confinement losses of the fundamental mode were analyzed via the finite element method by varying the effective core diameter and the dimensions of the “windmill” shaped cladding. The simulation results showed that the number of guided modes were significantly reduced in the “windmill” fiber design, as the radial dimension of the air and SC sapphire cladding regions increase with corresponding decrease in the azimuthal dimension. It is anticipated that the “windmill” SCSF will readily improve the performance of current fiber optic sensors in the harsh environment and potentially enable those that were limited by the extremely large modal volume of unclad SCSF.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1]
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  1. Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States)
Publication Date:
Research Org.:
Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States)
Sponsoring Org.:
USDOE Office of Fossil Energy (FE)
OSTI Identifier:
1258651
Grant/Contract Number:  
FE0012274
Resource Type:
Accepted Manuscript
Journal Name:
Optical Engineering
Additional Journal Information:
Journal Volume: 54; Journal Issue: 10; Journal ID: ISSN 0091-3286
Publisher:
SPIE
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; single crystal sapphire; modal reduction; optical fiber

Citation Formats

Cheng, Yujie, Hill, Cary, Liu, Bo, Yu, Zhihao, Xuan, Haifeng, Homa, Daniel, Wang, Anbo, and Pickrell, Gary. Modal reduction in single crystal sapphire optical fiber. United States: N. p., 2015. Web. doi:10.1117/1.OE.54.10.107103.
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Cheng, Yujie, Hill, Cary, Liu, Bo, Yu, Zhihao, Xuan, Haifeng, Homa, Daniel, Wang, Anbo, & Pickrell, Gary. Modal reduction in single crystal sapphire optical fiber. United States. https://doi.org/10.1117/1.OE.54.10.107103
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Cheng, Yujie, Hill, Cary, Liu, Bo, Yu, Zhihao, Xuan, Haifeng, Homa, Daniel, Wang, Anbo, and Pickrell, Gary. Mon . "Modal reduction in single crystal sapphire optical fiber". United States. https://doi.org/10.1117/1.OE.54.10.107103. https://www.osti.gov/servlets/purl/1258651.
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@article{osti_1258651,
title = {Modal reduction in single crystal sapphire optical fiber},
author = {Cheng, Yujie and Hill, Cary and Liu, Bo and Yu, Zhihao and Xuan, Haifeng and Homa, Daniel and Wang, Anbo and Pickrell, Gary},
abstractNote = {A new type of single crystal sapphire optical fiber (SCSF) design is proposed to reduce the number of guided modes via a highly dispersive cladding with a periodic array of high and low index regions in the azimuthal direction. The structure retains a “core” region of pure single crystal (SC) sapphire in the center of the fiber and a “cladding” region of alternating layers of air and SC sapphire in the azimuthal direction that is uniform in the radial direction. The modal characteristics and confinement losses of the fundamental mode were analyzed via the finite element method by varying the effective core diameter and the dimensions of the “windmill” shaped cladding. The simulation results showed that the number of guided modes were significantly reduced in the “windmill” fiber design, as the radial dimension of the air and SC sapphire cladding regions increase with corresponding decrease in the azimuthal dimension. It is anticipated that the “windmill” SCSF will readily improve the performance of current fiber optic sensors in the harsh environment and potentially enable those that were limited by the extremely large modal volume of unclad SCSF.},
doi = {10.1117/1.OE.54.10.107103},
journal = {Optical Engineering},
number = 10,
volume = 54,
place = {United States},
year = {Mon Oct 12 00:00:00 EDT 2015},
month = {Mon Oct 12 00:00:00 EDT 2015}
}
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https://doi.org/10.1117/1.OE.54.10.107103
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    Works referencing / citing this record:

    Single Crystal Fibers: Diversified Functional Crystal Material
    journal, December 2019

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