23 December 2013 Ultra-broadband multi-sized PbS quantum dots fiber amplifier based on a symmetric fiber coupler
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Abstract
We proposed an ultra-broadband multi-sized PbS quantum dots(QDs) fiber amplifier based on a symmetric fused tapered coupler. The 2x2 tapered fiber coupler was coated with a mixture of PbS QDs in two different sizes. By using the multisized PbS QDs as the gain medium, a maximum bandwidth of 400 nm (1200~1600 nm) has been achieved under evanescent wave excitation. In addition, with a 70 mW of 980 nm pump, we obtained a small signal gain of greater than 14 dB in this region.
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Xiaolan Sun, Juanjuan Chen, Rong Dai, Tingyun Wang, Wei Zhou, Zesheng An, "Ultra-broadband multi-sized PbS quantum dots fiber amplifier based on a symmetric fiber coupler", Proc. SPIE 9043, 2013 International Conference on Optical Instruments and Technology: Optoelectronic Devices and Optical Signal Processing, 904317 (23 December 2013); doi: 10.1117/12.2038033; https://doi.org/10.1117/12.2038033
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