Dye-doped polymer microring laser coupled with stimulated resonant Raman scattering

Yanagi, Hisao; Takeaki, Rei; Tomita, Satoshi; Ishizumi, Atsushi; Sasaki, Fumio; Yamashita, Kenichi; Oe, Kunishige
July 2009
Applied Physics Letters;7/20/2009, Vol. 95 Issue 3, p033306
Academic Journal
Polymer ring laser was fabricated with 1,4-bis[2-[4-[N,N-di(p-totyl)amino]phenyl]vinyl]benzene (DADSB)-doped polyvinyl-pyrrolidone (PVP) thin films coated on an inner surface of a quartz microcapillary. Ring-waveguided multimode lasing was observed under pulsed optical pumping. With increasing excitation wavelengths, an additional emission peak based on stimulated resonant Raman scattering (SRRS) appeared with a Raman shift of the stretching vibration of DADSB. When the SRRS peak just overlapped with each ring laser modes, the emission intensity was periodically enhanced. Such a wavelength-selective Raman coupling can demonstrate a tunable single-mode microring laser.


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