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| Main Authors: | , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2510.07188 |
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| _version_ | 1866908634936508416 |
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| author | Dewansingh, Anand Deaton, Abigail Bergman, Cortland Liu, Hengzhou Olin, Tracy Dawson, Nathan J. |
| author_facet | Dewansingh, Anand Deaton, Abigail Bergman, Cortland Liu, Hengzhou Olin, Tracy Dawson, Nathan J. |
| contents | A liquid-core (LiCo) dye laser was demonstrated using Rhodamine B (RhB) dissolved in glycerol as the gain medium and fluorinated ethylene propylene (FEP) tubing as the waveguide. Photoluminescence and amplified spontaneous emission (ASE) studies identified optimal RhB concentrations of 0.1 wt.% and 0.3 wt.% for low-threshold laser operation. Laser emission was achieved in LiCo rods with 1/16 inch and 1/32 inch inner diameter FEP tubing, with narrower tubing providing enhanced mode confinement and spectral narrowing. The addition of cavity mirrors improved emission coherence, revealing a distinct laser mode at low pump energies with mode spacing inconsistent with a simple Fabry-Pérot cavity, indicating complex mode coupling and internal reflections. Limitations include spectral broadening and scattering-induced parasitic feedback, which suggest avenues for further optimization in waveguide materials and output coupling. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_07188 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Multimode emission of fluorinated ethylene propylene clad large diameter liquid-core lasers Dewansingh, Anand Deaton, Abigail Bergman, Cortland Liu, Hengzhou Olin, Tracy Dawson, Nathan J. Optics A liquid-core (LiCo) dye laser was demonstrated using Rhodamine B (RhB) dissolved in glycerol as the gain medium and fluorinated ethylene propylene (FEP) tubing as the waveguide. Photoluminescence and amplified spontaneous emission (ASE) studies identified optimal RhB concentrations of 0.1 wt.% and 0.3 wt.% for low-threshold laser operation. Laser emission was achieved in LiCo rods with 1/16 inch and 1/32 inch inner diameter FEP tubing, with narrower tubing providing enhanced mode confinement and spectral narrowing. The addition of cavity mirrors improved emission coherence, revealing a distinct laser mode at low pump energies with mode spacing inconsistent with a simple Fabry-Pérot cavity, indicating complex mode coupling and internal reflections. Limitations include spectral broadening and scattering-induced parasitic feedback, which suggest avenues for further optimization in waveguide materials and output coupling. |
| title | Multimode emission of fluorinated ethylene propylene clad large diameter liquid-core lasers |
| topic | Optics |
| url | https://arxiv.org/abs/2510.07188 |