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
Link To Document :
