https://scholars.lib.ntu.edu.tw/handle/123456789/607062
標題: | Beyond GHz optical frequency up-converted modulation of LEDs with integrated acousto-optic transducer | 作者: | Lai L.-C Lin D.-J Chiang W.-H Huang C.-T Lin G.-R GONG-RU LIN JIAN-JANG HUANG |
關鍵字: | Acoustic surface wave devices;Acoustic waves;Data handling;Frequency domain analysis;Frequency modulation;Light;Light modulation;Natural frequencies;Optical materials;Optical signal processing;Transducers;Visible light communication;Acousto-optics;Carrier frequency;Data signals;Digital transducers;Lightemitting diode;Modulation schemes;On-off keying modulations;Optical frequency;Optical frequency modulation;Resistance capacitance;Light emitting diodes | 公開日期: | 2021 | 卷: | 46 | 期: | 20 | 起(迄)頁: | 5189-5192 | 來源出版物: | Optics Letters | 摘要: | Traditional visible light communication (VLC) via light-emitting diodes (LEDs) employs the on-off keying (OOK) modulation scheme. Even though optical frequency modulation has many advantages, it is hardly used for LED VLC because a high carrier frequency cannot be applied to the LED cavity due to the resistance-capacitance limit. Here, by monolithically integrating an LED with an integrated digital transducer, we experimentally demonstrate the intermixing of gigahertz surface acoustic waves and electrical data signals in the LED cavity at room temperature. An optical transmitter was realized by in situ frequency up-conversion of the data signals from an LED, which has the advantages of improving transmission performance by up-shifting the data spectrum away from low-frequency noise. Our proposed integrated acousto-optic transducer opens a new developing scheme on the frequency up-mixed data encoding of an LED beyond its inherent modulation bandwidth for future VLC. ? 2021 Optical Society of America |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85117396316&doi=10.1364%2fOL.440983&partnerID=40&md5=b39935066c1670ed1dd2918495ac6dba https://scholars.lib.ntu.edu.tw/handle/123456789/607062 |
ISSN: | 01469592 | DOI: | 10.1364/OL.440983 |
顯示於: | 電機工程學系 |
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