Fiber amplifiers and fiber lasers 1. Introduction. 1.1. Historical developments. 1.2. Materials. 1.3. Operating principles. 1.4. Applications. 1.5. Book overview. 1.6. Future challenges 2. Basic concepts. 2.1. Introduction. 2.2. Three level and four level laser. 2.3. Optical waveguide. 2.4. Rate equations for fiber amplifier. 2.5. Pump laser. 2.6. Optical transitions and gain. 2.7. Single mode fiber amplifier. 2.8. High power cladding pumped devices 3. Absorption and emission in rare earths. 3.1. Introduction. 3.2. Atomic transitions in rare earth atoms. 3.3. Er doped glass. 3.4. Yb doped glass. 3.5. Nd doped glass. 3.6. Tm doped glass. 3.7. Model of emission cross section 4. Amplifier fiber fabrication. 4.1. Introduction. 4.2. Transmission optical fiber fabrication. 4.3. Rare earth doping. 4.4. Alternate glass host fabrication. 4.5. Photonic crystal fiber fabrication 5. Amplifier design model and results. 5.1. Introduction. 5.2. Er doped fiber characterization. 5.3. Single mode amplifier model. 5.4. Photonic crystal fiber amplifier 6. Amplifier dynamic characteristics. 6.1. Introduction. 6.2. Gain dynamics. 6.3. Multichannel amplification. 6.4. Amplifier noise. 6.5. Preamplifier results. 6.6. Pulse propagation 7. High power amplifiers. 7.1. Introduction. 7.2. Waveguide designs and pumping. 7.3. DCF laser and amplifier results. 7.4. Er Yb Co doped cladding pumped amplifier. 7.5. DCF model 8. Pump laser. 8.1. Introduction. 8.2. Materials epitaxial growth and operating principle. 8.3. 980 nm laser. 8.4. 1480 nm laser. 8.5. 808 nm laser 9. Transmission system application. 9.1. Introduction. 9.2. Long distance transmission. 9.3. Coherent transmission. 9.4. Subscriber transmission. 9.5. Soliton transmission 10. Nonlinear effects. 10.1. Introduction. 10.2. FWM. 10.3. Stimulated Raman scattering. 10.4. Stimulated Brillouin scattering. 10.5. Supercontinuum generation 11. Planar waveguide amplifiers and lasers. 11.1. Introduction. 11.2. Er doped planar waveguide. 11.3. Nd doped planar waveguide. 11.4. Er Yb Co doped planar waveguide. 11.5. Yb doped planar waveguide. 11.6. High power waveguide lasers. 11.7. Supercontinuum generation 12. Fiber laser. 12.1. Introduction. 12.2. Fiber laser designs. 12.3. Multiwavelength laser. 12.4. Tunable fiber lasers. 12.5. High power fiber lasers 13. Fiber Raman lasers and amplifiers. 13.1. Introduction. 13.2. Fiber Bragg gratings. 13.3. Raman laser. 13.4. Cascaded Raman laser. 13.5. Raman amplifier 14. Mode locked pulse generation. 14.1. Introduction. 14.2. Harmonic mode locking. 14.3. Rational harmonic mode locking. 14.4. Stability of mode locked operation. 14.5. Pulse compression. 14.6. Passive mode locking schemes. 14.7. Other mode locked laser systems This invaluable book provides a comprehensive treatment of design and applications of rare earth doped fiber amplifiers and fiber lasers. Optical fiber amplifier is an important component for optical communication systems. It has applications as pre amplifiers post amplifiers and repeater amplifiers in evolving optical networks. Optical fiber amplifiers and fiber lasers are also important for high power industrial applications and sensors. The applications of fiber amplifiers were first studied in the late 1980s since then the diversity and scope of such applications have been steadily growing. Fiber Amplifiers and Fiber Lasers is self contained and unified in presentation. It can be used as an advanced text by graduate students and by practicing engineers. It is also suitable for non experts who wish to have an overview of fiber amplifiers and fiber lasers. The treatments in the book are detailed enough to capture the interest of curious readers and are complete enough to provide the necessary background to explore the subject further