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Dark pulse generation in fiber lasers incorporating carbon nanotubes

Liu, HH and Chow, KK (2014) Dark pulse generation in fiber lasers incorporating carbon nanotubes. Optics Express, 22 (24). pp. 29708-29713. ISSN 1094-4087

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Abstract

© 2014 Optical Society of America.We demonstrate the generation of dark pulses from carbon nanotube (CNT) incorporated erbium-doped fiber ring lasers with net anomalous dispersion. A side-polished fiber coated with CNT layer by optically-driven deposition method is embedded into the laser in order to enhance the birefringence and nonlinearity of the laser cavity. The dual-wavelength domain-wall dark pulses are obtained from the developed CNT-incorporated fiber laser at a relatively low pump threshold of 50.6 mW. Dark pulses repeated at the fifth-order harmonic of the fundamental cavity frequency are observed by adjusting the intra-cavity polarization state.

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