ABSTRACT

A wide range of potential applications for high-speed optical pulse sources includes fibre optic communications, high-speed sampling and signal processing, ultrafast analogue to digital conversion, terahertz wave generation, microwave and millimetre-wave measurement, optical time division multiplexed transmission, optical clock distribution and acquisition, ultra-high-speed logic and fibre radio. Diode lasers capable of being modulated at very high bit rates are key requirements for many of these applications. The major feature of the laser is its ability to generate modulated optical signals as a result of the direct injection of electrical currents. Hence, the dynamic response and modulation behaviour of lasers are of great importance for many applications and have been extensively studied for many years.