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.

© 2013 IEEE

PDF Article

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