"Version: 20210207"--Title page verso.Includes bibliographical references.1. High energy, high average power ytterbium lasers / Jorge J. Rocca, Yong Wang, Han Chi, Cory Baumgarten, Brendan A. Reagan, Kristian Dehne and Carmen S. Menoni -- 2. High-performance, thulium-doped, ultrafast fiber lasers / Christian Gaida, Martin Gebhardt, Cesar Jauregui and Jens Limpert -- 3. Transition metal doped zi…