High-Speed Photonics Interconnects

4	Lasers for Optical Interconnects
Brian Koch

CONTENTS

4.1  Introduction

4.2  Basic Semiconductor Laser Theory

4.2.1  Laser Cavity Modes

4.2.2  Threshold Current and Output Power

4.2.3  Lasing Wavelengths

4.2.4  Temperature Dependence and Thermal Impedance

4.2.5  Direct Modulation

4.2.6  Linewidth and Relative Intensity Noise

4.3  Types of Semiconductor Lasers

4.3.1  Fabry-Perot Lasers

4.3.2  Ring Lasers

4.3.3  Distributed Bragg Reflector (DBR) Lasers

4.3.4  Distributed Feedback (DFB) Lasers

4.3.5  Vertical-Cavity Surface-Emitting Lasers (VCSELs)

4.3.6  Widely Tunable Lasers

4.3.7  Mode-Locked Lasers

4.3.8  Multiwavelength Lasers

4.3.9  Other Small Cavity Lasers

4.4  Choosing Laser Designs for Interconnects

4.4.1  Critical Factors for ...