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Eu(DBM)3Phen doped poly(methyl methacrylate) core step‐index polymer optical fiber (SI POF) has been fabricated and related properties of the doping material were discussed. Amplified spontaneous emission (ASE) at 613 nm of a SI POF with 40 cm length has been observed at ambient temperature by end‐pumping with a YAG at 355 nm. The threshold of the absorbed pump power for the onset of ASE is about 0.01 mJ.
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Liang et al. (2005) studied this question.
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