Spatial Mode Selection in a Passively Coupled Fiber Laser: Theory and Experiment
2019-09
Loading...
View/Download File
Persistent link to this item
Statistics
View StatisticsJournal Title
Journal ISSN
Volume Title
Title
Spatial Mode Selection in a Passively Coupled Fiber Laser: Theory and Experiment
Authors
Published Date
2019-09
Publisher
Type
Thesis or Dissertation
Abstract
In this thesis, self-phasing due to spatial mode selection in a two-element passively coupled fiber laser is studied. The fields emitted by a two-core ytterbium doped fiber are coherently combined with a Dammann grating in an external cavity. We measure the combined beam power and supermode relative phase in the presence of phase errors between the gain elements and find that implementation of spatial mode selection via beam recycling results in a 90% increase in the average output power and nearly π/2 radians of passive phase adjustment. We show that these results require a phase of zero (modulo 2π) between the beams in the external cavity. Otherwise, the average output power and the coherence of the laser decreases. These findings are supported by the results of an eigenmode analysis of the resonator. These results show that beam recycling is a useful resonator design feature but must be appropriately implemented to obtain beneficial results.
Keywords
Description
University of Minnesota M.S.E.E. thesis. September 2019. Major: Electrical/Computer Engineering. Advisor: James Leger. 1 computer file (PDF); v, 42 pages.
Related to
Replaces
License
Series/Report Number
Funding information
Isbn identifier
Doi identifier
Previously Published Citation
Suggested citation
Tilseth, Erik. (2019). Spatial Mode Selection in a Passively Coupled Fiber Laser: Theory and Experiment. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/208964.
Content distributed via the University Digital Conservancy may be subject to additional license and use restrictions applied by the depositor. By using these files, users agree to the Terms of Use. Materials in the UDC may contain content that is disturbing and/or harmful. For more information, please see our statement on harmful content in digital repositories.