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Announcing the Final Thesis Defense of Yangyang Qin for the Degree of Master of Science in Optics and Photonics

Friday, April 7, 2017 10:00 AM to 11:00 AM
CREOL Room 102

Thesis Title:

“Design of a hydrogen-filled hollow-core fiber Raman laser”

Abstract:

Since first invented in the late 1950s, laser have experienced its considerable development due to its properties: high power density, low divergence and high coherence. The first Raman laser, realized in 1962, used nitrobenzene as the gain medium, which was intra-cavity-pumped inside a Q-switching ruby laser. Later, Raman laser in fibers and in silicon were reported.

The purpose of this study is to investigate the design of a Raman fiber laser based on a molecule hydrogen-filled hollow-core fiber with non-touching single ring of capillaries structure. O-hydrogen vibrational frequency shift of 4155cm-1 was employed to generate 1907nm Raman scattering from a 1064nm pump.

A thorough exploration towards how a Raman fiber laser system worked was made. Chamber design is an important process for the whole system. First the chamber design was done using CAD software for chamber modeling. Then, to save time and reduce production cost, I use 3D printing technology. Testing the printed chamber to see whether it fits well, more experiences are getting before the final metal chamber was made by machine shop. 

The whole thesis is divided into six chapters. Chapter one tells the history and development of Raman lasers. Chapter two and chapter three are brief introduction to hollow-core fibers and Raman scattering, respectively, which is the fundamental of this thesis. Chapter four focus on the design and development of the whole setup, concentrate more on gas chambers design. On the basis of setup design and assemble, chapter five test improve the setup.

 

Major: Master of Science in Optics and Photonics

 

Educational Career: B.S. Optoelectronic Information Engineering, 2015, Huazhong University of Science and Technology

                                            

Committee in Charge:

Dr. Rodrigo Amezcua (Chair)

Dr. Axel Schulzgen

Dr. Lawrence Shah

Approved for distribution by Dr. Rodrigo Amezcua, committee chair, on March 28, 2017

The public is welcome to attend.

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