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http://hdl.handle.net/11375/12771
Title: | Interactions of Self-Trapped Beams Generated with a Miniature Green Laser in a Photopolymerizable Medium |
Authors: | Wang, Tong |
Advisor: | Xu, Chang-qing Saravanamuttu, Kalaichelvi Knights, Andrew |
Department: | Engineering Physics |
Keywords: | nonlinear optics;green laser;self-trap;photopolymerization;beam interactions;filamentation rings;Other Engineering;Other Engineering |
Publication Date: | Apr-2013 |
Abstract: | <p>This study examined the self-trapping of light emitted by a miniature green laser in a photopolymerizable medium and the interactions between two parallel-propagating self-trapped beams. The work included the design and fabrication of an Intra-Cavity Frequency-Doubling (IC-FD) Nd: YVO<sub>4</sub>/MgO: PPLN miniature green laser with a stable and tunable output intensity. Emission from this laser enabled a systematic examination of self-trapping phenomena at incident intensities spanning 8 orders of magnitude (3.2× W·cm<sup>-2 </sup>to 6368 W·cm<sup>-2</sup>). When launched into a photopolymerizable medium, light emitted by the miniature green laser self-trapped by initiating polymerization and corresponding changes in refractive index along its propagation path. The evolution and dynamics of the self-trapped beam corresponded to the behaviour of self-trapped beams of coherent light. Interactions between a pair of parallel-propagating self-trapped beams were also characterised at a range of intensities. This study shows that the miniature green laser is an efficient, coherent source with a large range of output intensities for the excitation of self-trapped beams. This opens opportunities for its incorporation into small-scale optical systems designed to operate based on the generation and interactions of self-trapped beams.</p> |
URI: | http://hdl.handle.net/11375/12771 |
Identifier: | opendissertations/7629 8693 3545187 |
Appears in Collections: | Open Access Dissertations and Theses |
Files in This Item:
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fulltext.pdf | 3.41 MB | Adobe PDF | View/Open |
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