FREQUENCY CHARACTERISTICS OF MODERN LED PHOSPHOR MATERIALS

M. S. Fudin, K. D. Munbaev, H. K. Lipsanen, K. E. Aifantis, V. E. Bougrov, A. E. Romanov


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Abstract
Frequency characteristics of modern LED phosphor materials have been considered for the purpose of assessing the prospects of phosphor-based LEDs in wireless communication data systems which use optical wavelengths. The measurements have been carried out on the dependence of the emission intensity of single LEDs and LED chip-on-board modules with phosphors based on yttrium-aluminum and lutetium-aluminum garnets (with or without addition of nitridebased phosphors) as well as silicate-based phosphors, on the frequency of electric pulses exciting the emission. It was shown that from the point of view of data transmission rate, garnet-based phosphors (including systems with added nitride phosphors) are more promising than silicate–based ones. Garnet-based materials can be used in optical communication data systems with bandwidth (without extra modulation applied) up to 3 MHz with single–chip LEDs and up to 4.5 MHz with 9-chip LED chip-on-board modules. The results of the work indicate that a significant part of white LEDs used in general lighting systems can be even now used for data transfer, for example, in systems assisting positioning in closed spaces to facilitate people searching necessary rooms or objects.

Keywords: white LEDs, data transfer, optical wavelengths, phosphors, bandwidth

Acknowledgements. This work was financially supported by the Russian Government via funds allotted for the implementation of the Program of International Scientific Departments development at ITMO University. The authors are thankful to L.A. Nikulina for supplying them with the samples of LEDs.

References
 1.       Elgala H., Mesleh R., Haas H. Indoor broadcasting via white LEDs and OFDM. IEEETransactions on Consumer Electronics, 2009, vol. 55, no. 3, pp. 1127–1134. doi: 10.1109/TCE.2009.5277966
2.       Zhang H., Yuan Y., Xu W. PAPR reduction for DCO-OFDM visible light communications via semidefinite relaxation. IEEE Photonics Technology Letters, 2014, vol. 26, no. 17, pp. 1718–1721. doi: 10.1109/LPT.2014.2331360
3.       Tsonev D., Hyunchae Chun, Rajbhandari S., McKendry J.J.D., Videv S., Gu E., Haji M., Watson S., Kelly A.E., Faulkner G., Dawson M.D., Haas H., O’Brien D. A 3-Gb/s single-LED OFDM-based wireless VLC link using a gallium nitride μLED. IEEE Photonics Technology Letters, 2014, vol. 26, no. 7, pp. 637–640. doi: 10.1109/LPT.2013.2297621
4.       Grubor J., Randel S., Langer K.-D., Walewski J.W. Broadband information broadcasting using LED-based interior lighting. Journal of Lightwave Technology, 2008, vol. 26, no. 24, pp. 3883–3892. doi: 10.1109/JLT.2008.928525
5.       Smet P.F., Parmentier A.B., Poelman D. Selecting conversion phosphors for white light-emitting diodes. Journal of the Electrochemical Society, 2011, vol. 158, no. 6, pp. R37–R54. doi: 10.1149/1.3568524
6.       Bachmann V., Ronda C., Meijerink A. Temperature quenching of yellow Ce3+ luminescence in YAG:Ce. Chemistry of Materials, 2009, vol. 21, no. 10, pp. 2077–2084. doi: 10.1021/cm8030768
7.       van den Eeckhout K., Poelman D., Smet P.F. Persistent luminescence in non-Eu2+-doped compounds: a review. Materials, 2013, vol. 6, no. 7, pp. 2789–2818. doi: 10.3390/ma6072789
8.       Jovicic A., Li J., Richardson T. Visible light communication: opportunities, challenges and the path to market. IEEE Communications Magazine, 2013, vol. 51, no. 12, pp. 26–32. doi: 10.1109/MCOM.2013.6685754
9.       Feng L.-F., Li Y., Li D., Wang C.-D., Zhang G.-Y., Yao D.-S., Liu W.-F., Xing P.-F. Frequency response of modulated electroluminescence of light-emitting diodes. Chinese Physics Letters, 2011, vol. 28, no. 10, art. 107801. doi: 10.1088/0256-307X/28/10/107801
10.    McKendry J.J.D., Massoubre D., Zhang S., Rae B.R., Green R.P., Gu E., Henderson R.K., Kelly A.E., Dawson M.D. Visible-light communications using a CMOS-controlled micro-light-emitting-diode array. Journal of Lightwave Technology, 2012, vol. 30, no. 1, pp. 61–67. doi: 10.1109/JLT.2011.2175090
11.    Wu Y., Yang A., Feng L., Zuo L., Sun Y.-N. Modulation based cells distribution for visible light communication. Optics Express, 2012, vol. 20, no. 22, pp. 24196–24208. doi: 10.1364/OE.20.024196
12.    Khalid A.M., Cossu G., Corsini R., Choudhury P., Ciaramella E. 1-Gb/s Transmission over a phosphorescent white LED by using rate-adaptive discrete multitone modulation. IEEE Photonics Journal, 2012, vol. 4, no. 5, pp. 1465–1473. doi: 10.1109/JPHOT.2012.2210397
13.    Das P., Park Y., Kim K.-D. Performance of color-independent OFDM visible light communication based on color space. Optics Communications, 2014, vol. 324, pp. 264–268. doi: 10.1016/j.optcom.2014.03.060
14.    Sung J.-Y., Chow C.-W., Yeh C.-H. Is blue optical filter necessary in high speed phosphor-based white light LED visible light communications? Optics Express, 2014, vol. 22, no. 17, pp. 20646–220651. doi: 10.1364/OE.22.020646
15.    Aseev V.A., Kolobkova E.V., Nekrasova Y.A., Nikonorov N.V.,Rokhmin A.S. Lyuminestsentsiya margantsa vo ftorfosfatnykh steklakh [Manganese luminescence in fluorine-phosphate glasses]. Scientific and Technical Journal of Information Technologies, Mechanics and Optics, 2012, no. 6 (82), pp. 36–39.
16.    Babin V., Bichevin V., Gorbenko V., Kink M., Makhov A., Maksimov Y., Nikl M., Stryganyuk G., Zazubovich S., Zorenko Y. Time-resolved spectroscopy of exciton-related states in single crystals and single crystalline films of Lu3Al5O12 and Lu3Al5O12:Ce. Physica Status Solidi (B) Basic Research, 2011, vol. 248, no. 6, pp. 1505–1512. doi: 10.1002/pssb.201046486
17.    Van den Eeckhout K., Smet P.F., Poelman D. Persistent luminescence in Eu2+-doped compounds: a review. Materials, 2010, vol. 3, no. 4, pp. 2536–2566. doi: 10.3390/ma3042536
18.    Grobe L., Paraskevopoulos A., Hilt J., Schulz D., Lassak F., Hartlieb F., Kottke C., Jungnickel V., Langer K.-D. High-speed visible light communication systems. IEEE Communications Magazine, 2013, vol. 51, no. 12, pp. 60–66. doi: 10.1109/MCOM.2013.6685758
19.    Komine T., Nakagawa M. Fundamental analysis for visible-light communication system using LED lights. IEEE Transactions on Consumer Electronics, 2004, vol. 50, no. 1, pp. 100–107. doi: 10.1109/TCE.2004.1277847
20.    Vucic J., Kottke C., Nerreter S., Langer K.-D., Walewski J.W. 513 Mbit/s visible light communications link based on DMT modulation of a white LED. Journal of Lightwave Technology, 2010, vol. 28, no. 24, pp. 3512–3518. doi: 10.1109/JLT.2010.2089602


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