Abstract

The modulation bandwidth of a light-emitting diode is inversely proportional to the carrier lifetime, which changes with varying injected current. However, in conventional implementations of visible light communications, the influence of bias current is always emphasized, while the effects of modulation indices and signal components are ignored. In this Letter, it is the first time, to the best of our knowledge, that the mechanism on how modulated signal components impact modulation bandwidth is clarified. We reveal and interpret this impact by featuring the response at different modulation indices and intensity distributions mathematically and experimentally, proposing a series of theoretical approaches for the insight of modulation at a high index. This Letter donates a novel perspective on deciding appropriate configurations for modulators according to the modulation characteristics at a high index of the input signal.

© 2018 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Improving the modulation bandwidth of LED by CdSe/ZnS quantum dots for visible light communication

Xiangtian Xiao, Haodong Tang, Tianqi Zhang, Wei Chen, Wanli Chen, Dan Wu, Rui Wang, and Kai Wang
Opt. Express 24(19) 21577-21586 (2016)

Towards 10  Gb/s orthogonal frequency division multiplexing-based visible light communication using a GaN violet micro-LED

Mohamed Sufyan Islim, Ricardo X. Ferreira, Xiangyu He, Enyuan Xie, Stefan Videv, Shaun Viola, Scott Watson, Nikolaos Bamiedakis, Richard V. Penty, Ian H. White, Anthony E. Kelly, Erdan Gu, Harald Haas, and Martin D. Dawson
Photon. Res. 5(2) A35-A43 (2017)

4 Gbps direct modulation of 450 nm GaN laser for high-speed visible light communication

Changmin Lee, Chong Zhang, Michael Cantore, Robert M. Farrell, Sang Ho Oh, Tal Margalith, James S. Speck, Shuji Nakamura, John E. Bowers, and Steven P. DenBaars
Opt. Express 23(12) 16232-16237 (2015)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (4)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (5)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription