Since the first edition of this book was published in 1997, the photonics landscape has evolved considerably and so has the role of distributed feedback (DFB) laser diodes. Although tunable laser diodes continue to be introduced in advanced optical communication systems, DFB laser diodes are still widely applied in many deployed systems. This also includes wavelength tunable DFB laser diodes and DFB laser diode arrays, usually integrated with intensity or phase modulators and semiconductor optical amplifiers. This valuable resource gives professionals a comprehensive description of the different effects that determine the behavior of a DFB laser diode. Special attention is given to two new chapters on wavelength tunable DFB laser diodes and bistable and unstable DFB laser diodes. Among many other updates throughout the reference, semi-conductor and electromagnetic professionals are also provided two new appendices. This book fully covers the underlying theory, commercial applications, necessary design criteria, and future direction of this technology.
Introduction to Fabry-Perot and Distributed Feedback Laser Diodes - Historical Background. Laser Diode Device Structure. Operation of the Laser Diode. Essential Laser Diode Characteristics. Use of Laser Diodes in Optical Communications Systems. Dynamic Single-Mode Laser Diodes. Organization of This Book. ; Rate Equation Theory of Laser Diodes -Introduction. Carrier Density Rate Equation. Photon Density Rate Equation. Phase Equations. Introducing Noise in the Rate Equations. Optical Gain and Absorption. Some Well-Known Solutions of the Rate Equations. The Influence of External Reflections. Summary. ; Coupled-Mode Theory of DFB Laser Diodes - The Physical Processes Inside a Laser Diode. The Need for Simplification. Assumptions about the Modeled Laser Structure. Optical Wave Propagation. Discussion of the Coupled-Mode Wave Equations. The Electrical Transport Problem. The Standing-Wave Effect in Gain-Coupled Lasers. Boundary Conditions. ; Applying the Coupled Mode Theory -Introduction. Threshold Solutions for Simple DFB Lasers. Numerical Solutions of the Coupled Mode Model. The Narrowband Approach for Solving the Coupled Mode Model. The Broadband Approach for Solving the Coupled Mode Model. Coupling Coefficients for DFB Lasers. Derivation of the Rate Equations for DFB Lasers. Longitudinal Spatial Hole Burning. ; A Closer Look at the Carrier Injection -Introduction. Heterojunctions and Semi-Insulating Materials. Carrier Leakage Over Heterobarriers. Carrier Injection in Gain-Guided and Weakly Index-Guided Lasers. Lateral Current Leakage in Index-Guided Structures. Parasitic Elements. Microwave Effects. Circuit Modeling of Leakage and Parasitic Elements. Summary. ; The Spectrum of DFB Laser Diodes - Amplified Spontaneous Emission. Side-Mode Rejection and Yield of DFB Lasers. Degradation of the SMSR by Spatial Hole Burning. DFB Lasers with Reduced Spatial Hole Burning. Measurement of the ASE Spectrum of DFB Lasers. Extraction of Device Parameters from the Spectrum. ; The IM and FM Behavior of DFB Laser Diodes - Measuring the IM Response of Laser Diodes. Measuring the FM Response of Laser Diodes. The IM Response. The FM Response. Lateral Spatial Hole Burning. Dynamics of Quantum-Well Lasers. The Detuned Loading Effect. Extension of the Modulation Bandwidth by Making use of a Photon-Photon Resonance. Designing High-Speed DFB Lasers. ; Harmonic and Intermodulation Distortion in DFB Laser Diodes -Introduction. Measuring the Harmonic Distortion. Influence of the Relaxation Oscillations. Influence of Gain Suppression. Influence of the Spatial Hole Burning. Influence of Leakage Currents. Dips in the Bias and Frequency Dependence of the Distortion. Relation with CSO and CTB. Designing Highly Linear DFB Lasers. ; Noise Characteristics of DFB Laser Diodes - Measuring Noise Characteristics. FM Noise in DFB Lasers. Linewidth of DFB Lasers. Causes of Linewidth Rebroadening in DFB Lasers. Relative Intensity Noise of DFB Lasers. Designing Highly Coherent DFB Lasers. Summary. ; Wavelength Tunable DFB Laser Diodes - Thermally Tunable Single Section DFB Lasers and DFB Arrays. Electronically Tunable Single-Section DFB Lasers. Widely Tunable DFB Lasers. Thermally Widely Tunable DFB Lasers. Electronically Widely Tunable DFB Lasers. The Linewidth of Tunable DFB Lasers. Maximizing the Tuning Range of Widely Tunable DFB Lasers. ; Bistable and Self-Pulsating DFB Laser Diodes - Bistability in DFB Laser Diodes. Exploitation in All-Optical Flip-Flops. Exploitation in All-Optical Signal Regeneration. Unstable, Self-Pulsating DFB Laser Diodes. Clock Extraction Using Self-Pulsating DFB Laser Diodes. The Future of All-Optical Signal Processing. ; Fabrication and Packaging of DFB Laser Diodes - Laser Diode Fabrication Techniques. Grating Fabrication Techniques. Packaging of DFB Laser Diodes. ; Epilogue - DFB Lasers in Optical Communications. Other Applications of DFB Lasers. Materials and Fabrication. ;
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Geert Morthier
Geert Morthier is a professor and group leader at the department of information technology at Ghent University. He earned his Ph.D. in electrical engineering from Ghent University.
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Patrick Vankwikelberge
Patrick Vankwikelberge is head of business development at the technology transfer office of Ghent University. He earned his Ph.D. in electrical engineering from Ghent University.