Amplified Spontaneous Emissions from π-Conjugated Dye Doped Polymer Film and Silicate Optical Fiber

Yasuaki ITAKURA; Akihiro TOMIOKA; Shinji KINOSHITA; Atsushi FUJIMOTO

doi:10.1093/ietele/e89-c.12.1746

Amplified Spontaneous Emissions from π-Conjugated Dye Doped Polymer Film and Silicate Optical Fiber

Yasuaki ITAKURA, Akihiro TOMIOKA, Shinji KINOSHITA, Atsushi FUJIMOTO

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We prepared transparent polymer films doped with π-conjugated organic dyes around a multimode silica fiber and observed very narrow fluorescence peaks as compared with the fluorescence in solution. The peak position showed no dependence on the excitation wavelength, indicating that it could not be explained by a whispering gallery mode in a medium with broad optical gain. The peaks can be explained by amplified spontaneous emissions (ASE) because the intensity depended linearly on the excitation intensity with a threshold. When the dye-doped film was formed on the portion of a fiber with the clad etched out and was excited by the polarized laser propagating inside the fiber core, we observed ASE peaks not of the dyes but of the optical fiber itself, suggesting the possibility that the dyes were oriented with their transition moment pointing parallel to the film surface. These fiber ASE peaks shifted to longer wavelength when we varied the excitation wavelength to shorter wavelength, which clearly ruled out the possibility of silicate Raman scattering as the origin.

Publication: IEICE TRANSACTIONS on Electronics Vol.E89-C No.12 pp.1746-1749

Publication Date: 2006/12/01

Publicized

Online ISSN: 1745-1353

DOI: 10.1093/ietele/e89-c.12.1746

Type of Manuscript: Special Section PAPER (Special Section on Towards the Realization of Organic Molecular Electronics)

Category: Evaluation of Organic Materials

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Yasuaki ITAKURA, Akihiro TOMIOKA, Shinji KINOSHITA, Atsushi FUJIMOTO, "Amplified Spontaneous Emissions from π-Conjugated Dye Doped Polymer Film and Silicate Optical Fiber" in IEICE TRANSACTIONS on Electronics, vol. E89-C, no. 12, pp. 1746-1749, December 2006, doi: 10.1093/ietele/e89-c.12.1746.
Abstract: We prepared transparent polymer films doped with π-conjugated organic dyes around a multimode silica fiber and observed very narrow fluorescence peaks as compared with the fluorescence in solution. The peak position showed no dependence on the excitation wavelength, indicating that it could not be explained by a whispering gallery mode in a medium with broad optical gain. The peaks can be explained by amplified spontaneous emissions (ASE) because the intensity depended linearly on the excitation intensity with a threshold. When the dye-doped film was formed on the portion of a fiber with the clad etched out and was excited by the polarized laser propagating inside the fiber core, we observed ASE peaks not of the dyes but of the optical fiber itself, suggesting the possibility that the dyes were oriented with their transition moment pointing parallel to the film surface. These fiber ASE peaks shifted to longer wavelength when we varied the excitation wavelength to shorter wavelength, which clearly ruled out the possibility of silicate Raman scattering as the origin.
URL: https://global.ieice.org/en_transactions/electronics/10.1093/ietele/e89-c.12.1746/_p

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@ARTICLE{e89-c_12_1746,
author={Yasuaki ITAKURA, Akihiro TOMIOKA, Shinji KINOSHITA, Atsushi FUJIMOTO, },
journal={IEICE TRANSACTIONS on Electronics},
title={Amplified Spontaneous Emissions from π-Conjugated Dye Doped Polymer Film and Silicate Optical Fiber},
year={2006},
volume={E89-C},
number={12},
pages={1746-1749},
abstract={We prepared transparent polymer films doped with π-conjugated organic dyes around a multimode silica fiber and observed very narrow fluorescence peaks as compared with the fluorescence in solution. The peak position showed no dependence on the excitation wavelength, indicating that it could not be explained by a whispering gallery mode in a medium with broad optical gain. The peaks can be explained by amplified spontaneous emissions (ASE) because the intensity depended linearly on the excitation intensity with a threshold. When the dye-doped film was formed on the portion of a fiber with the clad etched out and was excited by the polarized laser propagating inside the fiber core, we observed ASE peaks not of the dyes but of the optical fiber itself, suggesting the possibility that the dyes were oriented with their transition moment pointing parallel to the film surface. These fiber ASE peaks shifted to longer wavelength when we varied the excitation wavelength to shorter wavelength, which clearly ruled out the possibility of silicate Raman scattering as the origin.},
keywords={},
doi={10.1093/ietele/e89-c.12.1746},
ISSN={1745-1353},
month={December},}

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TY - JOUR
TI - Amplified Spontaneous Emissions from π-Conjugated Dye Doped Polymer Film and Silicate Optical Fiber
T2 - IEICE TRANSACTIONS on Electronics
SP - 1746
EP - 1749
AU - Yasuaki ITAKURA
AU - Akihiro TOMIOKA
AU - Shinji KINOSHITA
AU - Atsushi FUJIMOTO
PY - 2006
DO - 10.1093/ietele/e89-c.12.1746
JO - IEICE TRANSACTIONS on Electronics
SN - 1745-1353
VL - E89-C
IS - 12
JA - IEICE TRANSACTIONS on Electronics
Y1 - December 2006
AB - We prepared transparent polymer films doped with π-conjugated organic dyes around a multimode silica fiber and observed very narrow fluorescence peaks as compared with the fluorescence in solution. The peak position showed no dependence on the excitation wavelength, indicating that it could not be explained by a whispering gallery mode in a medium with broad optical gain. The peaks can be explained by amplified spontaneous emissions (ASE) because the intensity depended linearly on the excitation intensity with a threshold. When the dye-doped film was formed on the portion of a fiber with the clad etched out and was excited by the polarized laser propagating inside the fiber core, we observed ASE peaks not of the dyes but of the optical fiber itself, suggesting the possibility that the dyes were oriented with their transition moment pointing parallel to the film surface. These fiber ASE peaks shifted to longer wavelength when we varied the excitation wavelength to shorter wavelength, which clearly ruled out the possibility of silicate Raman scattering as the origin.
ER -