Date of Award


Document Type


Degree Name

Master of Science (MS)



Committee Chair

Lingze Duan

Committee Member

A. M. Elsamadicy

Committee Member

Anup Sharma


Ultrashort laser pulses, Mode-locked lasers


In this thesis, the Group Velocity Dispersion (GVD) of air has been measured by using a femtosecond frequency comb at 1.5 µm. By comparing the spectra from a balanced and unbalanced Mach - Zehnder interferometer, the need for vacuum tube is eliminated. The method employs the Fast Fourier Transform of both auto- and cross correlation to find the spectral and their differences. The GVD of air is then calculated from these spectral phase differences. With twenty-five independent measurements, the GVD of air was found to be 0.0120 fs²/mm, with a standard deviation of 0.0075 fs²/mm.



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