Stimulated Raman scattering, lasing, and molecular energy transfer mechanisms in KXe probed by laser spectroscopy

Desai, Kavita V

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https://hdl.handle.net/2142/121217 Copy

Description

Title

Stimulated Raman scattering, lasing, and molecular energy transfer mechanisms in KXe probed by laser spectroscopy

Author(s)

Desai, Kavita V

Issue Date

2023-07-07

Director of Research (if dissertation) or Advisor (if thesis)

• Eden, J. Gary
• Mironov, Andrey E

Doctoral Committee Chair(s)

• Eden, J. Gary
• Mironov, Andrey E

Committee Member(s)

• Dragic, Peter D
• Lorenz, Virginia O
• Ruzic, David N
• Zhao, Yang

Department of Study

Electrical & Computer Eng

Discipline

Electrical & Computer Engr

Degree Granting Institution

University of Illinois at Urbana-Champaign

Degree Name

Ph.D.

Degree Level

Dissertation

Keyword(s)

• Excimers
• Laser Spectroscopy

Abstract

In laser spectroscopy experiments containing K-Xe vapor, collisional pairs are photoassociated to the B^2\mathrm{\Sigma}_{1/2}^+ and A^2\mathrm{\Pi} interatomic potentials. The combination of the shallow well of the KXe interatomic potentials along with the fine structure splitting of the K 4P states being ≪kT results in non-linear properties near the alkali D lines. Specifically in K-Xe vapor, stimulated Raman scattering has been observed, and its amplification is measured along with the excitation profile. This is the first demonstration of stimulated Raman scattering in both the alkali-rare gas molecules and a molecule with a dissociative ground state. Through these spectroscopy measurements, a high quantum efficiency laser/amplifier is engineered and physical properties of the KXe gain medium are characterized. Molecular features in KXe with fine resolution are also reported. In addition, the B^2\mathrm{\Sigma}_{1/2}^+ interatomic potential was also studied, and the state potential was modified using the Franck-Condon factor principle to include the blue satellite feature found in absorption and laser excitation experiments. Lastly, an excimer pumped alkali laser in KXe is demonstrated.

Graduation Semester

2023-08

Type of Resource

Thesis

Handle URL

https://hdl.handle.net/2142/121217

Copyright and License Information

Copyright 2023 Kavita Desai

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