Laser Emissions from Disodium Fluorescein-Doped Poly(Vinyl Alcohol) Films
Superradiant-mode laser emissions were obtained from disodium fluorescein (DF)-doped poly(vinyl alcohol) (PVA) films which had been dip-coated on a microscope glass slide. When the film was transversely pumped using a nitrogen laser, superradiant emission was trapped and propagated in the supporting...
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| Format: | Article |
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The Japan Society of Applied Physics
2000
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| Online Access: | http://shdl.mmu.edu.my/2708/ |
| _version_ | 1848790129426038784 |
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| author | Yap, Seong-Shan Tou, Teck-Yong Ng, Seik-Weng |
| author_facet | Yap, Seong-Shan Tou, Teck-Yong Ng, Seik-Weng |
| author_sort | Yap, Seong-Shan |
| building | MMU Institutional Repository |
| collection | Online Access |
| description | Superradiant-mode laser emissions were obtained from disodium fluorescein (DF)-doped poly(vinyl alcohol) (PVA) films which had been dip-coated on a microscope glass slide. When the film was transversely pumped using a nitrogen laser, superradiant emission was trapped and propagated in the supporting glass slide which acted as a waveguide. The trapped light underwent multiple internal reflections before it exited at both ends of the slide, producing a lasing effect. The laser beam profile varied with the edge condition of the glass slide; a circular beam was obtained with a frosted edge. An output conversion efficiency of 22% was obtained for a fresh sample while its lasing output energy at a localized excitation position, or operating lifetime, decreased at a rate of 0.015% per shot of nitrogen laser. Despite the decrease in output energy, the laser peak wavelength of DF was largely unchanged. |
| first_indexed | 2025-11-14T18:07:42Z |
| format | Article |
| id | mmu-2708 |
| institution | Multimedia University |
| institution_category | Local University |
| last_indexed | 2025-11-14T18:07:42Z |
| publishDate | 2000 |
| publisher | The Japan Society of Applied Physics |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | mmu-27082013-11-11T04:36:14Z http://shdl.mmu.edu.my/2708/ Laser Emissions from Disodium Fluorescein-Doped Poly(Vinyl Alcohol) Films Yap, Seong-Shan Tou, Teck-Yong Ng, Seik-Weng QC Physics Superradiant-mode laser emissions were obtained from disodium fluorescein (DF)-doped poly(vinyl alcohol) (PVA) films which had been dip-coated on a microscope glass slide. When the film was transversely pumped using a nitrogen laser, superradiant emission was trapped and propagated in the supporting glass slide which acted as a waveguide. The trapped light underwent multiple internal reflections before it exited at both ends of the slide, producing a lasing effect. The laser beam profile varied with the edge condition of the glass slide; a circular beam was obtained with a frosted edge. An output conversion efficiency of 22% was obtained for a fresh sample while its lasing output energy at a localized excitation position, or operating lifetime, decreased at a rate of 0.015% per shot of nitrogen laser. Despite the decrease in output energy, the laser peak wavelength of DF was largely unchanged. The Japan Society of Applied Physics 2000-10 Article NonPeerReviewed Yap, Seong-Shan and Tou, Teck-Yong and Ng, Seik-Weng (2000) Laser Emissions from Disodium Fluorescein-Doped Poly(Vinyl Alcohol) Films. Japanese Journal of Applied Physics, 39 (Part 1, No. 10). pp. 5855-5858. ISSN 0021-4922 http://jjap.jsap.jp/link?JJAP/39/5855/ doi:10.1143/JJAP.39.5855 doi:10.1143/JJAP.39.5855 |
| spellingShingle | QC Physics Yap, Seong-Shan Tou, Teck-Yong Ng, Seik-Weng Laser Emissions from Disodium Fluorescein-Doped Poly(Vinyl Alcohol) Films |
| title | Laser Emissions from Disodium Fluorescein-Doped Poly(Vinyl Alcohol) Films |
| title_full | Laser Emissions from Disodium Fluorescein-Doped Poly(Vinyl Alcohol) Films |
| title_fullStr | Laser Emissions from Disodium Fluorescein-Doped Poly(Vinyl Alcohol) Films |
| title_full_unstemmed | Laser Emissions from Disodium Fluorescein-Doped Poly(Vinyl Alcohol) Films |
| title_short | Laser Emissions from Disodium Fluorescein-Doped Poly(Vinyl Alcohol) Films |
| title_sort | laser emissions from disodium fluorescein-doped poly(vinyl alcohol) films |
| topic | QC Physics |
| url | http://shdl.mmu.edu.my/2708/ http://shdl.mmu.edu.my/2708/ http://shdl.mmu.edu.my/2708/ |