Chirp optimization of 1550nm InAs/InP Quantum Dash based directly modulated lasers for 10Gb/s SMF transmission up to 65Km

Static and dynamic properties of InP-based Quantum Dashes of 1.55μm directly modulated lasers are reported. Using growth and design optimization, we demonstrate linewidth enhancement factor above threshold as low as 2 and decreasing with injected current. This unique chirp behavior leads to uncompensated and non-amplified SMF 10Gb/s transmissions at a constant bias current from back-to-back up to 65km. This result opens the way to the fabrication of a low cost DML for access and metro applications.