Blue polymer optical fiber amplifiers based on conjugated fluorene oligomers

Jenny Clark, Luca Bazzana, Donal D.C. Bradley, Juan Cabanillas-Gonzalez, Guglielmo Lanzani, David G. Lidzey, Jorge Morgado, Alessandro Nocivelli, Wing C. Tsoi, Tersilla Virgili, Ruidong Xia

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Abstract

We fabricated polymer optical fiber (POF) amplifiers operating between 440 and 480 nm, using POFs doped with a series of fluorene oligomers, including tri-, penta-(9,9-dioctylfluorene) and hepta-(9,9-dihexylfluorene). The gain properties of pure oligofluorene films demonstrate gain coefficients on the order of 250 dB/cm and amplified spontaneous emission thresholds between 1 and 8 μJ cm-2, significantly lower than other fluorene gain media. The optical and morphological characteristics of PMMA thin films doped with the oligomers demonstrate that the oligomers are largely isolated within the PMMA. The optical and gain properties of POFs produced using an adapted preform-drawing technique and doped with the oligofluorenes provide gain values on the order of 0.07 dB for 2 mm of doped POF. The oligofluorenes are largely isolated within the POFs, paving the way for all optical gain-switching. © 2008 Society of Photo-Optical Instrumentation Engineers.
Original languageEnglish (US)
JournalJournal of Nanophotonics
Volume2
Issue number1
DOIs
StatePublished - Dec 1 2008
Externally publishedYes

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