We report lasing studies of poly~styrene
!
waveguides doped with amino- and cyano-substituted
oligo phenylene vinylene
~
distyryl benzene
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model compounds under picosecond excitation. Optical
feedback is provided by distributed Bragg gratings formed in the film by interference patterns in the
pump beam. We demonstrate broad tunability of laser emission in these materials and simultaneous
lasing at two wavelengths separated by 23 nm. Tuning ranges of the model compounds are
compared with previous experiments.
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