TY - GEN
T1 - A quantitative analysis of the performance of an all-fiber electronically tunable wavelength filter using a four-layer model
AU - Lee, J. E.
AU - Chen, Q.
AU - Yin, Shizhuo
AU - Lin, M. R.
AU - Zhang, Qiming
AU - Reichard, Karl Martin
AU - Ditto, D. H.
AU - Mazurowski, J.
AU - Hackert, M.
PY - 2006
Y1 - 2006
N2 - In this work, an investigation of the tuning characteristics of electrically tunable long-period gratings (LPGs) is presented. A precise four-layer model is used to quantitatively analyze the tuning potential of the gratings and experimental data is provided to support the analysis. The four-layer model includes a silica core layer with an inscribed LPG, a thin silica cladding layer (∼40 μm), an ultra-thin (∼ 50 nm) high refractive index indium-tin dioxide (ITO) inner electrode layer, and a tunable electro-optic polymer layer. It has been found that the inner electrode layer, made of high refractive index ITO, can be modeled as a high index overlay and causes the forward propagating modes in the thin silica cladding to reorganize as the ambient refractive index changes. This reorganization effect can lead to a significant increase (10 plus fold) in the tuning range of LPG tunable filters. Moreover, the required specifications of the tunable polymer layer are quantitatively analyzed. Finally, the required characteristics of the electro-optic polymer are realized by using a nano-composite of zinc sulfide and ferroelectric relaxor poly(vinylidene fluoride - trifluoroethylene -chlorofluoroethylene) terpolymer.
AB - In this work, an investigation of the tuning characteristics of electrically tunable long-period gratings (LPGs) is presented. A precise four-layer model is used to quantitatively analyze the tuning potential of the gratings and experimental data is provided to support the analysis. The four-layer model includes a silica core layer with an inscribed LPG, a thin silica cladding layer (∼40 μm), an ultra-thin (∼ 50 nm) high refractive index indium-tin dioxide (ITO) inner electrode layer, and a tunable electro-optic polymer layer. It has been found that the inner electrode layer, made of high refractive index ITO, can be modeled as a high index overlay and causes the forward propagating modes in the thin silica cladding to reorganize as the ambient refractive index changes. This reorganization effect can lead to a significant increase (10 plus fold) in the tuning range of LPG tunable filters. Moreover, the required specifications of the tunable polymer layer are quantitatively analyzed. Finally, the required characteristics of the electro-optic polymer are realized by using a nano-composite of zinc sulfide and ferroelectric relaxor poly(vinylidene fluoride - trifluoroethylene -chlorofluoroethylene) terpolymer.
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U2 - 10.1117/12.680087
DO - 10.1117/12.680087
M3 - Conference contribution
AN - SCOPUS:33750706220
SN - 0819463930
SN - 9780819463937
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Photorefractive Fiber and Crystal Devices
T2 - Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications XII
Y2 - 16 August 2006 through 17 August 2006
ER -