High refractive index without absorption in a rare-earth-ion-doped optical fiber

2012 ◽  
Vol 109 (3) ◽  
pp. 725-729 ◽  
Author(s):  
Zhiping Wang ◽  
Benli Yu
Keyword(s):  
Refractive Index ◽  
Rare Earth ◽  
Optical Fiber ◽  
High Refractive Index ◽  
Rare Earth Ion

scholarly journals Instrumentation for Simultaneous Non-Destructive Profiling of Refractive Index and Rare-Earth-Ion Distributions in Optical Fiber Preforms

Instruments ◽  
2018 ◽  
Vol 2 (4) ◽  
pp. 23 ◽  
Author(s):  
Marilena Vivona ◽  
Michalis Zervas
Keyword(s):  
Refractive Index ◽  
Rare Earth ◽  
Optical Fiber ◽  
Communication Systems ◽  
Optical Tomography ◽  
Dopant Distribution ◽  
Fiber Preform ◽  
Rare Earth Ion ◽  
Non Destructive ◽  
Fiber Preforms

We present a non-destructive technique for a combined evaluation of refractive index and active-dopant distribution in the same position along a rare-earth-doped optical fiber preform. The method relies on luminescence measurements, analyzed through an optical tomography technique, to define the active dopant distribution and ray-deflection measurements to calculate the refractive index profile. The concurrent evaluation of both the preform refractive index and the active dopant profiles allows for an accurate establishment of the dopant distribution within the optical core region. This combined information is important for the optimization and development of a range of advanced fibers, used, for example, in a high-power fiber lasers and modern spatial-division-multiplexing optical communication systems. In addition, the non-destructive nature allows the technique to be used to identify the most appropriate preform segment, thus increasing fiber yield and reducing development cycles. We demonstrate the technique on an Yb3+-doped aluminosilicate fiber preform and compare it with independent refractive index and active-dopant measurements. This technique will be useful for quality evaluation and optimization of optical fiber preforms and lends itself to advanced instrumentation.

Characteristics of Long-Period Optical Fiber Grating with High Refractive Index nm-Thick Film Overlay

2009 ◽  
Vol 29 (10) ◽  
pp. 2665-2672 ◽  
Author(s):  
于秀娟 Yu Xiujuan ◽  
张敏 Zhang Min ◽  
王利威 Wang Liwei ◽  
雷鸣 Lei Ming ◽  
廖延彪 Liao Yanbiao
Keyword(s):  
Refractive Index ◽  
Optical Fiber ◽  
Thick Film ◽  
High Refractive Index ◽  
Fiber Grating ◽  
Long Period

Spectroscopic Properties of Rare Earth Ion Doped TeO2-B2O3-PbO Glass

2014 ◽  
Vol 69 (6) ◽  
Author(s):  
A. Noranizah ◽  
K. Azman ◽  
H. Azhan ◽  
E. S. Nurbaisyatul ◽  
A. Mardhiah
Keyword(s):  
Refractive Index ◽  
Rare Earth ◽  
Glass Sample ◽  
Spectroscopic Properties ◽  
Molar Refraction ◽  
Energy Band Gap ◽  
Melt Quenching ◽  
Rare Earth Ion ◽  
Optical Energy Band Gap ◽  
Oxide Ion

This work focuses on the spectroscopic study of RE3+ ion, namely, trivalent neodymium (Nd3+) doped lead borotellurite glass with a composition of TeO2-B2O3-PbO. The glass sample has been prepared by conventional melt-quenching technique. The density, molar volume and optical energy band gap of these glasses have been measured. The refractive index, molar refraction and polarizability of oxide ion have been calculated by using Lorentz-Lorentz relations. The absorption spectra are recorded using UV-Vis-NIR spectrometer in the range of 200-900 nm.

scholarly journals High-refractive-index transparent coatings enhance the optical fiber cladding modes refractometric sensitivity

2013 ◽  
Vol 21 (23) ◽  
pp. 29073 ◽  
Author(s):  
Jean-Michel Renoirt ◽  
Chao Zhang ◽  
Marc Debliquy ◽  
Marie-Georges Olivier ◽  
Patrice Mégret ◽  
...  
Keyword(s):  
Refractive Index ◽  
Optical Fiber ◽  
High Refractive Index ◽  
Transparent Coatings ◽  
Optical Fiber Cladding

Tunable third-harmonic generation in a chalcogenide-tellurite hybrid optical fiber with high refractive index difference

2014 ◽  
Vol 39 (4) ◽  
pp. 1005 ◽  
Author(s):  
Tonglei Cheng ◽  
Weiqing Gao ◽  
Meisong Liao ◽  
Zhongchao Duan ◽  
Dinghuan Deng ◽  
...  
Keyword(s):  
Refractive Index ◽  
Optical Fiber ◽  
Harmonic Generation ◽  
Third Harmonic Generation ◽  
High Refractive Index ◽  
Third Harmonic ◽  
Refractive Index Difference

Ultraviolet Curable Silicone Optical Fiber Coatings

1986 ◽  
Vol 88 ◽  
Author(s):  
Gail J. Dehli ◽  
Chi-Long Lee ◽  
Michael A. Lutz ◽  
Toshio Suzuki
Keyword(s):  
Refractive Index ◽  
Optical Fiber ◽  
High Refractive Index ◽  
Radical Chain ◽  
Polymer Backbone ◽  
Fiber Coating ◽  
Ultraviolet Curable ◽  
Free Radical Chain Reaction ◽  
Radical Chain Reaction ◽  
Low Refractive Index

ABSTRACTTechnology coupling fast ultraviolet (UV) cure response with elastomeric properties in silicone formulations has been developed. Rapid photocure was obtained through addition of mercaptan to vinyl on silicon via a free radical chain reaction resulting in a monosulfide link. One optical fiber coating based on the technology, OPTIGARD™ X3-6662, is a onepart formulation which can be cured very rapidly (≤0.1 sec) upon UV exposure (≥25 mJ/cm2) to provide a low refractive index (RI=1.42), elastomeric film exhibiting good low temperature properties. A high refractive index counterpart (RI=1.51), OPTIGARD™ X3-6663, was obtained through incorporation of a controlled amount of phenyl groups into the polymer backbone. The technology, an IR-100 Award winner in 1985, is being used by the fiber optic industry to satisfy their need for coatings which will cure fast, perform over a wide temperature range, and be moisture insensitive.

scholarly journals Lapping and Polishing of Crystalline KY(WO4)2: Toward High Refractive Index Contrast Slab Waveguides

Micromachines ◽  
2019 ◽  
Vol 10 (10) ◽  
pp. 674 ◽  
Author(s):  
Carlijn van Emmerik ◽  
Roy Kooijman ◽  
Meindert Dijkstra ◽  
Sonia Garcia-Blanco
Keyword(s):  
Refractive Index ◽  
High Refractive Index ◽  
Rare Earth Ion ◽  
Final Thickness ◽  
Power Efficient ◽  
Glass Substrates ◽  
Refractive Index Contrast ◽  
Double Tungstate ◽  
Index Contrast ◽  
On Chip

Rare-earth ion-doped potassium yttrium double tungstate, RE:KY(WO4)2, is a promising candidate for small, power-efficient, on-chip lasers and amplifiers. Thin KY(WO4)2-on-glass layers with thicknesses ranging between 0.9 and 1.6 μm are required to realize on-chip lasers based on high refractive index contrast waveguides operating between 1.55 and 3.00 µm. The crystalline nature of KY(WO4)2 makes the growth of thin, defect-free layers on amorphous glass substrates impossible. Heterogeneous integration is one of the promising approaches to achieve thin KY(WO4)2-on-glass layers. In this process, crystal samples, with a thickness of 1 mm, are bonded onto a glass substrate and thinned down with an extensive lapping and polishing procedure to the desired final thickness. In this study, a lapping and polishing process for KY(WO4)2 was developed toward the realization of integrated active optical devices in this material.

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