HFAN-02.5.0: Single-Ended vs Differential Methods of Driving a Laser Diode

Abstract

A proper interface circuit to connect a driver to a laser diode is essential for an optimized optical transmitter design. In general, single-ended drive of laser diodes provides a straight forward solution that requires less components and board space. The purpose of this application note is to reveal how differential drive provides a faster edge-speed than a single-ended drive.