High energy ultrashort pulsed lasers can exhibit interesting nonlinear properties during propagation and material interactions. Studying such phenomena is of particular interest to the directed energy community. Generating a high energy ultrashort pulse is done by amplification of an ultrashort seed. This research's aim is to design and fabricate an all-fiber mode-locked oscillator to serve as such a seed. Use of an all-fiber design allows the development of a self-starting oscillator which is thermally and mechanically insensitive, and can be packaged into a case with a very small footprint. The ability to tailor the output of the oscillator allows the same oscillator design to be compatible with a broad range of systems. Implementing a design which is rugged and compact in nature allows the oscillator to be deployed outside a controlled laboratory environment allowing propagation experimentation to be conducted in real world environments. Presented are the design considerations for building two mode locked oscillators based on a figure of eight design with a nonlinear amplifying loop mirror serving as the fast saturable absorber. Each oscillator outputs a linearly polarized pulse with repetition rates near 10 MHz, and a bandwidth of near 12 nm centered at 1.55 µm. This output is then amplified and tailored to the oscillator's specific end use. One system requires a 1 ps pulse with 2 nm of bandwidth centered at 780 nm. The second system requires a pulse duration of 65 fs with 40 nm of bandwidth at 780 nm.
If this is your thesis or dissertation, and want to learn how to access it or for more information about readership statistics, contact us at STARS@ucf.edu.
Master of Science (M.S.)
College of Sciences
Length of Campus-only Access
Masters Thesis (Campus-only Access)
Bryan, Joshua, "Design and Fabrication of a Compact, Rugged, and Thermally Stabilized Fiber Based Mode Locked Oscillator with Amplification." (2022). Electronic Theses and Dissertations, 2020-. 982.
Restricted to the UCF community until May 2027; it will then be open access.