Fabrication of ultra-high numerical aperture GeO2-doped fiber and its use for broadband supercontinuum generation
IR@CGCRI: CSIR-Central Glass and Ceramic Research Institute, Kolkata
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| Title |
Fabrication of ultra-high numerical aperture GeO2-doped fiber and its use for broadband supercontinuum generation
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| Creator |
Reddy, P Harshavardhan
Kir'yanov, A V Dhar, Anirban Das, Shyamal Dutta, Debjit Pal, Mrinmay Barmenkov, Y O Minguella-Gallardo, J A Bhadra, Shyamal Kumar Paul, Mukul Chandra |
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| Subject |
Processing Science
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| Description |
We report the fabrication, characterization, and application (broadband supercontinuum SC] generation) of ultra-high numerical-aperture heavily (50 mol. %) GeO2-doped optical fiber, obtained through a modified chemical vapor deposition process and rod-in-tube method. The formation of Ge-related diamagnetic defect centers, such as germanium oxygen defect centers (GeODC) with nonbridging lone electron pairs, confirmed by x-ray photoelectron spectroscopy and optical absorption studies, inducing hypolarizable local dipoles, may be responsible in boosting the nonlinear effects and enhancing stimulated Raman scattering at pumping with high-power pulses, culminating in generation of broadband SC generation. The SC spans toward the Stokes side up to 2.4 mu m, under the action of ns-range pulses launched from a smartly Q-switched erbiumdoped fiber laser with operation wavelength (1.56 mu m) matching the zero-dispersion wavelength of the high GeO2-doped fiber. (C) 2017 Optical Society of America
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| Publisher |
Optical Society of America
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| Date |
2017-11
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| Type |
Article
NonPeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://cgcri.csircentral.net/4103/1/reddy.pdf
Reddy, P Harshavardhan and Kir'yanov, A V and Dhar, Anirban and Das, Shyamal and Dutta, Debjit and Pal, Mrinmay and Barmenkov, Y O and Minguella-Gallardo, J A and Bhadra, Shyamal Kumar and Paul, Mukul Chandra (2017) Fabrication of ultra-high numerical aperture GeO2-doped fiber and its use for broadband supercontinuum generation. Applied Optics, 56 (33). pp. 9315-9324. ISSN 0003-6935 |
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| Relation |
http://cgcri.csircentral.net/4103/
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