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Proceedings Paper

Recent progress in research and development on micro-spherical lasers using conventional dye-doped solids and liquids, and dyes mixed in highly scattering media
Author(s): Hiroshi Taniguchi; Shinji Tanosaki; Masahisa Nishiya; Balasigamani Devaraj; Humio Inaba
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Paper Abstract

Lasing characteristics of laser-active material-doped microdroplets containing highly scattering fat emulsion Intralipid-10 percent are studied experimentally. Noteworthy findings are than well-defined lasing threshold can be observed and appreciable magnitude-enhancement of emission intensity with suitable conditions of the Intralipid mixing ratio, in comparison with original neat-active-material- doped microdroplets. We present and discuss the measured results of input-output intensities for different Intralipid mixing ratios in these active material-soft scatterer system. It was found that almost no lasing neat- microdroplets can achieve lasing by substituting suitably certain amounts of the Intralipid causing multiple light scattering. Spectral measurements of light emission from the active material-Intralipid microdroplets show the tendency of spectral narrowing with the increase of the pumping intensity and with the optimum Intralipid concentration. It is our belief that the present results make this novel method of active material-Intralipid microsystem very attractive for a variety of future applications including diagnostic tools for highly sensitive detecting and identification of small quantity objects and species embedded or hidden in highly scattering media such as biological tissues and cellular structures.

Paper Details

Date Published: 1 November 1997
PDF: 8 pages
Proc. SPIE 3176, Tunable Solid State Lasers, (1 November 1997); doi: 10.1117/12.293451
Show Author Affiliations
Hiroshi Taniguchi, Iwate Univ. (Japan)
Shinji Tanosaki, Iwate Univ. (Japan)
Masahisa Nishiya, Iwate Univ. (Japan)
Balasigamani Devaraj, Biophotonics Information Labs. (Japan)
Humio Inaba, Biophotonics Information Labs. and Tohoku Institute of Technology (Japan)

Published in SPIE Proceedings Vol. 3176:
Tunable Solid State Lasers
Wieslaw Strek; Edward Lukowiak; Barbara Nissen-Sobocinska, Editor(s)

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