DocumentCode
13888
Title
Improving OOK Modulation Rate of Visible LED by Peaking and Carrier Sweep-Out Effects Using 
-Schottky Diodes-Capacitance Circuit
Author
Binh, P.H. ; Trong, V.D. ; Renucci, Pierre ; Marie, X.
Author_Institution
Inst. of Mater. Sci., Hanoi, Vietnam
Volume
31
Issue
15
fYear
2013
fDate
Aug.1, 2013
Firstpage
2578
Lastpage
2583
Abstract
In this paper, we present an improvement for LED driver circuit by inserting a threshold voltage on the resistive branch of the conventional RC current-shaping circuit. The proposed method enhances the peaking and carrier sweep-out effects in the LED´s active region when the electrical pulse is turned on and off, respectively, thereby the LED modulation rate can be greatly improved. A practical implementation of the transmitter using Schottky diodes to provide the threshold voltage and an off-the-shelf AlGaInP 660 nm RC-LED is reported. We demonstrate an error-free data transmission at the rate of 500 Mbit/s over 20 m step-index POF.
Keywords
III-V semiconductors; Schottky diodes; aluminium compounds; amplitude shift keying; capacitance; driver circuits; gallium compounds; indium compounds; light emitting diodes; optical fibre communication; optical modulation; optical polymers; optical transmitters; AlGaInP; LED active region; LED driver circuit; LED modulation rate; OOK modulation rate; RC current-shaping circuit; bit rate 500 Mbit/s; carrier sweep-out effects; distance 20 m; electrical pulse; error-free data transmission; n-Schottky diode-capacitance circuit; off-the-shelf RC-LED; on-off keying; peaking effects; polymer optical fiber; resistive branch; step-index POF; threshold voltage; transmitter; visible LED; wavelength 660 nm; Bandwidth; Light emitting diodes; Modulation; Optical pulses; Optical transmitters; Schottky diodes; Threshold voltage; Current-shaping circuit; light-emitting diode; on-off keying modulation; polymer optical fiber communication;
fLanguage
English
Journal_Title
Lightwave Technology, Journal of
Publisher
ieee
ISSN
0733-8724
Type
jour
DOI
10.1109/JLT.2013.2271452
Filename
6548060
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