Development of a cryogenic 2 μm multi-pass amplifier in nanosecond regime
- Autores: Fangxin Yue
- Directores de la Tesis: Xavier Mateos Ferré (dir. tes.), Venkatesan Jambunathan (codir. tes.), Jan Šulc (codir. tes.)
- Lectura: En la Universitat Rovira i Virgili ( España ) en 2021
- Idioma: español
- Tribunal Calificador de la Tesis: Ladislav Pina (presid.), Vaclav Kubecek (secret.), Xavier Mateos Ferré (voc.)
- Programa de doctorado: Programa de Doctorado en Nanociencia, Materiales e Ingeniería Química por la Universidad Rovira i Virgili
- Materias:
- Enlaces
- Tesis en acceso abierto en: TDX
- Resumen
Motivated by the increasing application demands on the 2 μm high average/peak power lasers, this thesis is devoted to develop a cryogenic 2 μm multi-pass amplifier in the nanosecond regime based on the Tm:Y2O3 transparent ceramics. To reach this goal, the active medium Tm:Y2O3 transparent ceramic was well studied and the master oscillator power amplifier concept was employed for developing the cryogenic laser system.
This work is divided into 7 chapters. Chapter 1 introduces the current state-of-the-art of the 2 μm pulsed lasers as well as the motivation and objectives of this dissertation. Chapters 2, 3 and 4 describe the characterization of the active medium Tm:Y2O3 transparent ceramic in terms of material structure, cryogenic spectroscopy, and continuous-wave lasing potential, respectively. From those studies, crucial laser design parameters, such as the exact pump/lasing wavelength, lifetime, gain factor, etc., were obtained. Chapter 5 presents the demonstration of a master oscillator, which served as the seed source for the amplifier stage. Chapter 6 shows the energy scaling via the multi-pass amplifier in two different geometries. Finally, chapter 7 summarizes the achieved results and outlooks the future research.
