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(a) Molecular structure of DADSB. (b) Schematic diagram of experimental setup for optically pumped emission measurements. The emitted light was collected by CCD spectrometer with polarization angle .
(a) Spontaneous fluorescence, (b) ASE, and (c) SRRS spectra of DADSB-doped PVP waveguides taken at , 452, and , respectively.
Changes in spectral features of ASE and SRRS as a function of excitation wavelengths. The PL peak intensities (solid line) and FWHMs (dashed line) of the ASE (●) and SRRS (∎) spectra taken at varied were plotted.
Changes in PL peak intensities of ASE (●) and SRRS (∎) spectra as a function of excitation pulse energy. The was fixed at . The peak intensity of the superimposed SRRS was obtained by subtracting the ASE background intensity.
Polarization dependence of PL spectra of DADSB-doped waveguides. The SRRS peaks superimposed on the ASE spectra were taken at and 90°.
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