Journal Papers

2010 - 2022 (total 89, including 89 peer-reviewed papers)

89	S. Sasaki, K. Masaoka, and Y. Koike, "Random depolarization film design based on modulation transfer function measurements of displays with different pixel pitches," Applied Optics, Vol. 63, Issue 11, pp. 2900-2905, April, 2024.
88	K. Muramoto and Y. Koike, "Stabilized Plastic Optical Fiber Link Even Without a Physical-Contact Fiber Connection," Journal of Lightwave Technology, Vol. 42, Issue 2, pp. 875-881, January, 2024.
87	S. Sasaki, M. Udono, and Y. Koike, "Random depolarization film design for real-color displays," Applied Optics, Vol. 61, Issue 3, pp. 669-675, January, 2022.
86	Y. Koike and K. Muramoto, "Error-free PAM-4 transmission by a high-speed plastic optical fiber without forward error correction," Optics Letters, Vol. 46, No. 15, August 2021. .
85	T. Akashi, A. Inoue, and Y. Koike, "Low-Noise Graded-Index Plastic Optical Fiber Achieved by Specific Copolymerization Process," Journal of Lightwave Technology, Vol. 39, Issue 11, June, 2021.
84	S. Sasaki, M. Udono, and Y. Koike, "Real-Color Displays Realized by Randomized Polarization," Applied Optics, Vol. 60, No. 11, pp. 3108-3113, April, 2021.
83	K. Watanabe, Y. Kobayashi, and Y. Koike, "Proposal of Novel Temperature-Independent Zero-Zero-Birefringence Polymer with High Heat-Resistance," (Invited Paper for Special Section on Electronic Displays), IEICE Trans. Electron., Volume E104-C No.2, Feb., 2021.
82	K. Muramoto, A. Inoue and Y. Koike, "Noise and Distortion Reduction in OFDM Radio-Over-Fiber Link by Graded-Index Plastic Optical Fiber," Photonics Technology Letters, Vol. 32, Issue 13, pp. 835-838, July, 2020
81	A. Inoue and Y. Koike, "Low-noise radio over graded-index plastic optical fiber," Optics Letters, Vol. 45, Issue 12, pp. 3192-3195, June, 2020.
80	K. Shikama and Y. Koike, "Reflowable Optical Connector with Glass-Ceramic Ferrule for Advanced Pluggable Transceiver Packaging," Optical Fiber Technology, Vol. 54, 102074, 2020.
79	K. Shikama, A. Aratake, and Y. Koike, "Analysis of Nano-Creep Deformation of Epoxy Adhesive in Optical Fiber Connector for Long-Term Reliability Prediction," Optical Fiber Technology, Vol. 52, 101975, 2019.
78	K. Muramoto, A. Inoue and Y. Koike, "Nonlinear Distortion Reduction Effect of Graded-Index Plastic Optical Fiber," IEEE Photon. Technol. Lett. Vol. 31, No. 10, pp. 791-794, 2019.
77	A. Inoue and Y. Koike, "Unconventional plastic optical fiber design for very short multimode fiber link," Opt. Express, Vol. 27, No. 9, pp.12061-12069, 2019.
76	A. Inoue and Y. Koike, "Intrinsically Stabilized Plastic Optical Fiber Link Subject to External Optical Feedback,"IEEE Photon. J. Vol. 11, No. 1, 7201207, 2019.
75	A. Inoue and Y. Koike, "Low-Noise Graded-Index Plastic Optical Fiber for Significantly Stable and Robust Data Transmission," Journal of Lightwave Technology, Vol. 36, No. 24, 5887-5892, 2018.
74	Y. Kaseda, A. Inoue and Y. Koike, "Significantly Robust Data Transmission by Ballpoint-pen Interconnect for Graded-index Plastic Optical Fiber," Journal of Lightwave Technology Vol. 36, Issue 18, 4167-4173, 2018.
73	M. A. Illarramendi, J. Zubia, I. Bikandi, I. Ayesta, I. Parola, I. Aramburu , J. Arrue, A. Tagaya, and Y. Koike, "Pump-Polarization Effects in Dye-Doped Polymer Optical Fibers," Journal of Lightwave Technology, Vol. 36, Issue 18, 4090-4098, 2018.
72	I. Ayesta, M. A. Illarramendi, J. Arrue, I. Parola, F. Jiménez, J. Zubia, A. Tagaya and Y. Koike, "Optical Characterization of Doped Thermoplastic and Thermosetting Polymer-Optical-Fibers," Polymers, Vol. 9, No. 3, Article No. 90, 2017.
71	A. Inoue and Y. Koike, "Misalignment Tolerance of Pluggable Ballpoint-Pen Interconnect of Graded-Index Plastic Optical Fiber for 4K/8K UHD Display," IEICE TRANS. Electron., Invited paper, Vol. E99-C, No. 11, pp. 1271-1276, 2016.
70	K. Minakawa, K. Koike, N. Hayashi, Y. Koike, Y. Mizuno and K. Nakamura, "Dependence of Brillouin Frequency Shift on Water Absorption Ratio in Polymer Optical Fibers," J. Appl. Phys. Vol. 119, pp. 223102, 2016.
69	I. Parola, M. A. Illarramendi, J. Arrue, I. Ayesta, F. Jiménez, J. Zubia, A. Tagaya, and Y. Koike, "Characterization of the Optical Gain in Doped Polymer Optical Fibres," Journal of Luminescence, Vol. 177, pp. 1-8, 2016.
68	M. Fang, Y. Okamoto, Y. Koike. Z. He, and T. C. Merkel, "Gas Separation Membranes Prepared with Copolymers of Perfluoro(2-Methylene-4,5-Dimethyl-1,3-Dioxlane) and Chlorotrifluoroethylene," Journal of Fluorine Chemistry, Vol. 188, pp. 18-22, 2016.
67	M. Shikanai, A. Tagaya, and Y. Koike, "Temperature-Independent Zero-Birefringence Polymer for Liquid Crystal Displays," Applied Physics Letters, Vol. 108, Issue 13, 131902-1/4, 2016.
66	Y. Koike and A. Inoue "High-Speed Graded-Index Plastic Optical Fibers and their Simple Interconnects for 4K/8K Video Transmission," Journal of Lightwave Technology, Invited Paper, Vol. 34, No. 6, pp. 1551-1555, 2016.
65	K. Mochizuki, K. Oosumi, F. Koizumi, Y. Shinohara, A. Tagaya, and Y. Koike, "Distribution Angle Control of a Light-Emitting Diode Downlight Lens with High Color Uniformity Using a Scattering Polymer," Optical Review, Vol. 22, pp. 422-426, 2015.
64	K. Minakawa, K. Koike, Q. Du, N. Hayashi, Y. Koike, Y. Mizuno, and K. Nakamura, "Temperature Dependence of Brillouin Frequency Shift in Polymers Controlled by Plasticization Effect," Journal of Applied Physics, Vol. 117, Issue 14, 144505-1/5, 2015.
63	Y. Shitanoki, S. J. Bennison, and Y. Koike, "Structural Behavior Thin Glass Ionomer Laminates with Optimized Specific Strength and Stiffness," Composite Structures, Vol. 125, pp. 615-620, 2015.
62	H. Shafiee, S. Beppu, S. Iwasaki, A. Tagaya, and Y. Koike, "Mechanisms of Orientational and Photoelastic Birefringence Generation of Methacrylates for the Design of Zero-Zero-Birefringence Polymers," Polymer Engineering & Science, Vol. 55, Issue 6, pp. 1330-1338, 2015.
61	S. Beppu, H. Hotta, H. Shafiee, A. Tagaya, and Y. Koike, "Investigation of optical and thermal properties of N-(alkyl-substituted) maleimides for use in zero-zero-birefringence polymer," Applied Optics, Vol. 54, Issue 4, pp. 779-788, 2015.
60	K. Koike, A. Suzuki, K. Makino, and Y. Koike, "Effects of Para-Fluorine Substituent of Polystyrene on Gradient-Index Fiber-Optic Properties," Optical Materials, Vol. 39, pp.143-147, 2015.
59	K. Koike, T. Araki, and Y. Koike, "A Highly Transparent and Thermally Stable Copolymer of 1-Adamantyl Methacrylate and Styrene," Polymer International, Vol. 64, Issue 2, pp. 188-195, 2015.
58	Y. Okamoto, H. Zhang, F. Mikes, Y. Koike, Z. He, and T. C. Merkel, "New Perfluoro-Dioxolane-Based Membranes for Gas Separations," Journal of Membrane Science, Vol. 471, pp. 412-419, 2014.
57	Y. Shitanoki, S. J. Bennison, and Y. Koike, "Analytic Models of a Thin Glass-Polymer Laminate and Development of a Rational Engineering Design Methodology," International Journal of Applied Mechanics, Vol. 81, Issue 12, 121009-1/7, 2014.
56	H. Yoshida, R. Nakao, Y. Masabe, K. Koike, and Y. Koike, "Effect of Cladding-Layer Glass Transition Temperature on Thermal Resistance of Graded-Index Plastic Optical Fibers," Polymer Journal, Vol. 46, pp. 823-826, 2014.
55	Y. Shitanoki, S. J. Bennison, and Y. Koike, "A Practical, Nondestructive Method to Determine the Shear Relaxation Modulus," Polymer Testing, Vol. 37, pp. 59-67, 2014.
54	Y. Shitanoki, S. J. Bennison, and Y. Koike, "A Rational Strength Prediction Approach to the Design of Double-glass Photovoltaic Modules," IEEE Journal of Photovoltaics, Vol. 4, No. 4, pp. 1071-1078, 2014.
53	A. Inoue, R. Furukawa, M. Matsuura, and Y. Koike, "Reflection Noise Reduction Effect of Graded-Index Plastic Optical Fiber in Multimode Fiber Link," Optics Letters, Vol. 39, No. 12, pp. 3662-3665, 2014.
52	K. Minakawa, K. Koike, N. Hayashi, Y. Koike, Y. Mizuno, and K. Nakamura, "Dependece of Brillouin Frequency Shift on Temperature in Poly(pentafluorostyrene)-Based Polymer Optical Fibers Estimated by Acoustic Velocity Measurement," IEICE Electronic Express, Vol. 11, No. 10, pp. 1-7, 2014.
51	K. Koike, T. Araki, and Y. Koike, "Influence of Dielectric Fluctuation on Light-Scattering Properties of Random Copolymers in Bulk," Polymer, Vol. 55, No. 11, pp. 2697-2703, 2014.
50	M. Matsuura, R. Furukawa, Y. Matsumoto, A. Inoue, and Y. Koike, "Evaluation of Modal Noise in Graded-Index Silica and Plastic Optical Fiber Links for Radio-over-Multimode Fiber Systems," Optics Express, Vol. 22, No. 6, pp. 6562-8, 2014.
49	K. Koike, Q. Du, S. Nishino, and Y. Koike, "Light Scattering of Ideal Random Copolymers in Bulk," Polymer, Vol. 55, No. 3, pp. 878-885, 2014.
48	K. Koike, H. Teng, Y. Koike, and Y. Okamoto, "Effect of Dopant Structure on the Refractive Index and Glass Transition Temperature of Polymeric Fiber-Optic Materials," Polymers for Advanced Technologies, Vol. 25, No. 2, pp. 204-210, 2014.
47	A. Sengupta, K. Koike, Y. Koike, and Y. Okamoto, "New Insights into Dopant Design for Graded-Index Plastic Optical Fibers for Transmission at 850 nm," Optical Materials, Vol. 36, No. 4, pp. 782-786, 2014.
46	S. Beppu, S. Iwasaki, H. Shafiee, A. Tagaya, and Y. Koike, "Design and Synthesis of Zero-Zero-Birefringence Polymers Using N-Methylmaleimide," Journal of Applied Polymer Science, Vol. 131, No. 12, pp. 40423-1/9, 2014.
45	T. Toma, H. Takizuka, T. Torikai, H. Suzuki, T. Ogi, and Y. Koike, "Development of a Household High-Definition Video Transmission System Based on Ballpoint-Pen Technology," Synthesiology, Vol. 7, No. 2, pp. 118-128, 2014.
44	K. Koike, F. Mikes, H. Zhang, Y. Koike, and Y. Okamoto, "Synthesis and Characterization of Copolymers of Perfluoro(2-methylene-4,5-dimethyl-1,3-dioxolane) and Perfluoro(2-methylene-1,3-dioxolane)," Journal of Fluorine Chemistry, Vol. 156, pp. 198-202, 2013.
43	R. Furukawa, M. Nagata, K. Mishima, M. Matsuura, A. Inoue, A. Tagaya, and Y. Koike, "Core stress Distribution of Phase Shifting Multimode Polymer Optical Fiber," Applied Physics Letters, Vol. 103, No. 21, 213301-1/4, 2013.
42	T. Toma, H. Asada, T. Ogi, and Y. Koike, "High-Speed Optical Home Network Using Graded Index Plastic Optical Fibers for a Smart House," Advances in Computer Science : an International Journal, Vol. 2, Issue 5, No. 6, pp. 141-149, 2013.
41	M. A. Illarramendi, J. Arrue, I. Ayesta, F. Jiménez, J. Zubia, I. Bikandi, A. Tagaya, and Y. Koike, "Amplified Spontaneous Emission in Graded-Index Polymer Optical Fibers: Theory and Experiment," Optics Express, Vol. 21, No. 20, pp. 24254-24266, 2013.
40	T. Toma, S. Suzuki, H. Tokura, Y. Inaba, T. Ogi, and Y. Koike, "Evaluation of 4K Ultra Definition Video for Telemedicine - Possibility of teledermatology Applications - Japanese Journal of Telemedicine and Telecare, Vol. 9, No. 2, pp. 66-73, 2013.
39	A. Sengupta, Y. Koike, and Y. Okamoto, "Investigation of the Physical Properties of Poly(ortho- and para-trifluoromethoxy styrenes)," Macromolecular Chemistry and Physics, Vol. 214, Issue 15, pp. 1734-1737, 2013.
38	N. Schlepple, M. Nishigaki, H. Uemura, H. Furuyama, Y. Sugizaki, H. Shibata, and Y. Koike, "4 x 10 Gbit/s Full-Duplex Optical Link with Compact Optical Sub-Assemblies and Thin GI 50/125 Plastic Optical Fibre Ribbon," Electronics Letters, Vol. 49, No. 13, pp. 835-836, 2013.
37	A. Inoue, T. Sassa, R. Furukawa, K. Makino, A. Kondo, and Y. Koike, "Efficient Group Delay Averaging in Graded-Index Plastic Optical Fiber with Microscopic Heterogeneous Core," Optics Express, Vol. 21, No. 14, pp. 17379-17385, 2013.
36	K. Makino, Y. Akimoto, K. Koike, A. Kondo, A. Inoue, and Y. Koike, "Low Loss and High Bandwidth Polystyrene-based Graded Index Polymer Optical Fiber," Journal of Lightwave Technology, Vol. 31, No. 14, pp. 2407-2412, 2013.
35	H. Teng, Z. Wan, Y. Koike, and Y. Okamoto, "Thermal and Optical Properties of Highly Fluorinated Copolymers of Methacrylates," Polymers for Advanced Technologies, Vol. 24, No. 5, pp. 520-523, 2013.
34	A. Takahashi, A. Inoue, T. Sassa, and Y. Koike, "Fluorination Effects on Attenuation Spectra of Plastic Optical Fiber Core Materials," Optical Materials Express, Vol. 3, No. 5, pp. 658-663, 2013.
33	S. Iwasaki, Z. Sato, H. Shafiee, A. Tagaya, and Y. Koike, "Design of Zero-Zero-Birefringence Polymers in Methacrylate Copolymer Systems Containing Trichloroethyl Methacrylate," Journal of Applied Polymer Science, Vol. 130, No. 1, pp. 138-144, 2013.
32	B. Zhang, L. Li, F. Mikes, Y. Koike, Y. Okamoto, and P. L. Rinaldie, "Multidimensional NMR Characterization of Perfluorinated Monomer and its Precursors," Journal of Fluorine Chemistry, Vol. 147, pp. 40-48, 2013.
31	J. Katsumata, T. Toma, and T. Ogi, "Introduction of Doctor's Second Opinion and Preventive Critical Path based on Remote Chat Conference," Japanese Journal of Telemedicine and Telecare, Vol. 8, no. 1, pp. 2-7, 2012.
30	N. Schlepple, M. Nishigaki, H. Uemura, H. Furuyama, K. Obara, H. Furuyama, Y. Sugizaki, H. Shibata, and Y. Koike, "Optoelectrical High-Speed HDMI Cable with Compact Optical Sub-Assembly and 4x3.4 Gb/s Plastic Optical Fiber Link," Electronics Letters, Vol.48, No.25, pp.1611-1613, 2012.
29	F. Mikes, H. Teng, Y. Koike, and Y. Okamoto, "Alternating Copolymers of Hexafluoroisobutylene with Vinyl Trifluoroacetate and Vinyl Pentafluorobenzoate," Journal of Polymer Science Part A, Polymer Chemistry, Vol. 50, No.22, pp. 4717-4720, 2012.
28	N. Schlepple, M. Nishigaki, H. Uemura, K. Obara, H. Furuyama, Y. Sugizaki, H. Shibata, and Y. Koike, "40 Gbps High-Speed Link over Thin GI 50/125 Plastic Optical Fibers and Compact Optical Sub-Assembly," IEEE Photonics Technology Letters, Vol. 24, No.19, pp. 1670-1672, 2012.
27	T. Kurashima, K. Sakuma, T. Arai, A. Tagaya, and Y. Koike, "A Polarized Laser Backlight Using a Zero-Zero-Birefringence Polymer for Liquid Crystal Displays," Optical Review, Vol. 19, No. 6, pp. 415-418, 2012.
26	S. Iwasaki, Z. Sato, H. Shafiee, A. Tagaya, and Y. Koike, "Design and Synthesis of Zero-Zero-Birefringence Polymers in a Quaternary Copolymerization System," Polymer, Vol. 53 pp. 3287-3296, 2012.
25	A. Inoue, T. Sassa, K. Makino, A. Kondo, and Y. Koike, "Intrinsic Transmission Bandwidths of Graded-Index Plastic Optical Fiber," Optics Letters, vol. 37, no. 13, pp. 2583-2585, 2012.
24	H. Ito, S. Yanai, S. Oda, A. Tagaya, and Y. Koike, "Zero-Birefringence Pressure-Sensitive Adhesives," AIP Advances, vol. 2, no. 2, 022142-1/5, 2012.
23	L. Lou, A. Tagaya, Y. Ide, Y. Koike, and Y. Okamoto, "Copolymers of Methyl Methacrylate with N-Trifluorophenyl Maleimides:High Glass Transition Temperature and Low Birefringence Polymers," Journal of Polymer Science Part A: Polymer Chemistry Journal, vol. 50, no. 17, pp. 3530-3536, 2012.
22	K. Makino, T. Kado, A. Inoue, and Y. Koike, "Low Loss Graded Index Polymer Optical Fiber with High Stability under Damp Heat Conditions," Optics Express, vol. 20, no. 12, pp. 12893-12898, 2012.
21	Y. Akimoto, M. Asai, K. Koike, K. Makino, and Y. Koike, "Poly(styrene)-Based Graded-Index Plastic Optical Fiber for Home Networks," Optics Letters, vol. 37, no. 11, pp. 1853-1855, 2012.
20	Y. Mukawa, A. Kondo, and Y. Koike, "Optimization of the Refractive Index Distribution of Graded-index Polymer Optical Fiber by the Diffusion-assisted Fabrication Process," Applied Physics Express, vol. 5, no. 4, 042501-1/3, 2012.
19	A. Tagaya, L. Lou, Y. Ide, Y. Koike and Y. Okamoto, "Improvement of the Physical Properties of Poly(Methyl Methacrylate) by Copolymerization with N-Pentafluorophenyl Maleimide; Zero-Orientational and Photoelastic Birefringence Polymers with High Glass Transition Temperatures," Science China Chemistry, vol. 55, no. 5, pp. 850-853, 2012.
18	R. Nakao, A. Kondo, and Y. Koike, "Fabrication of High Glass Transition Temperature Graded-Index Plastic Optical Fiber: Part 2 - Fiber Fabrication and Characterizations," Journal of Lightwave Technology, vol. 30, no. 7, pp. 969-973, 2012.
17	R. Nakao, A. Kondo, and Y. Koike, "Fabrication of High Glass Transition Temperature Graded-Index Plastic Optical Fiber: Part 2 - Fiber Fabrication and Characterizations," Journal of Lightwave Technology, accepted on Jan. 11, 2012.
16	T. Kojo, A. Tagaya, and Y. Koike, "Mechanism of Generation of Birefringence in Poly(Methyl Methacrylate/Styrene)," Polymer Journal, vol. 44, no. 2, pp. 167-173, 2012.
15	A. Tagaya and Y. Koike, "Compensation and Control of the Birefringence of Polymers for Photonics," Polymer Journal, vol. 44, no.4, pp. 306-314, 2012.
14	L. Lou, Y. Koike, and Y. Okamoto, "A Novel Copolymer of Methyl Methacrylate with N-Pentafluorophenyl Maleimide:High Glass Transition Temperature and Highly Transparent Polymer," Polymer, vol. 52, no. 16, pp. 3560-3564, 2011.
13	M. Asai, Y. Yamaki, S. Takahashi, and Y.Koike, "High-Thermally Stable and High-bandwidth Graded Index Plastic Optical Fiber for the　Vehicle Networks," Journal of Polymer Science Part B: Polymer Physics, accepted on July, 2011.
12	M. Asai, M. Shibayama, and Y. Koike, "Common Origin of Dynamics Heterogeneity and Cooperatively Rearranging Region in Polymer Melts," Macromolecules, vol.44, no.16, pp6615-6624, 2011.
11	M. Asai, Y. Inuzuka, K. Koike, S. Takahashi, and Y. Koike, "High-bandwidth Graded-Index Plastic Optical Fiber with Low-Attenuation, High-Bending Ability, and High-Thermal Stability for Home-Networks," Jounal of Lightwave Technology, vol. 29, no. 11, pp. 1620-1626, 2011.
10	Mikes, J. Baldrian, H. Teng, Y. Koike, Y. Okamoto, "Characterization and Properties of Semicrystalline and Amorphous Perfluoropolymer: poly(perfluoro-2-methylene-1,3-dioxolane)," Polymers for Advanced Technologies, in press, 2011.
9	D. Kobayashi, A. Tagaya, and Y. Koike, "A High-Retardation Polymer Film for Viewing Liquid Crystal Displays through Polarized Sunglasses without Chromaticity Change in the Image," Japanese Journal of Applied Physics, Volume 50, Issue 4, 042602-1/6, 2011.
8	H. Shafiee, K. Shikama, A. Tagaya, F. Hardinghaus, T. Miyaji, K. Kohler, and Y. Koike, "Control of the Birefringence Dispersion of an Optical Polymer by Doping with an Inorganic Crystal," Japanese Journal of Applied Physics, Volume 50, Issue 3, 032602-1/6, 2011.
7	M. Asai, M. Awata, and Y. Koike, "Effects of Rotation of Benzene Rings on Diffusion of Solvents in Polymer Melts," Industrial & Engineering Chemistry Research, Volume 50, Issue 6, pp. 3280-3286, 2011.
6	H. Shafiee, A. Tagaya, and Y. Koike, "Design and Synthesis of a Zero-Photoelastic Birefringence Polymer with a High Glass-Transition Temperature by a Random Copolymerization Method," Polymer Journal (2011) Volume 43, pp306-312, 2011.
5	M. Asai, Y. Mukawa, S.Takahashi, and Y. Koike, "Methodological Approach to Control Refractive Index Profile of Graded-Index Polymer Optical Fiber," Industrial & Engineering Chemistry Research, Volume 50, Issue 7, pp. 3895-3899, 2011.
4	H. Teng, L. Lou, K. Koike, Y. Koike, Y. Okamoto, "Synthesis and Characterization of Trifluoromethyl Substituted Styrene Polymers and Copolymers with Methacrylates: Effects of Trifluoromethyl Substituent on Styrene," polymer, Volume 52, Issue 4, pp. 949-953, 2011.
3	Y. Koike and K. Koike, "Progress in Low-Loss and High-Bandwidth Plastic Optical Fibers," Journal of Polymer Science Part B: Polymer Physics, Volume 49, Issue 1, pp. 2-17, 2011.
2	L. Lou, Y. Koike, Y. Okamoto, "Synthesis and Properties of Copolymers of Methyl Methacrylate with 2,3,4,5,6-Pentafluoro and 4-Trifluoromethyl 2,3,5,6-Tetrafluoro Styrenes: An Intrachain Interaction between Methyl Ester and Fluoro Aromatic Moieties," Journal of Polymer Science Part A: Polymer Chemistry, Vol. 48, Issue 22, pp. 4938-4942, 2010.
1	Y.Yamaki, M.Asai, S.Takahashi, and Y.Koike, "Novel Dopant for Graded-Index Polymer Optical Fiber with High-Thermal Stability," Applied Physics Express , Volume 3, Issue 7, 071601-1/3, 2010.