Single-walled carbon nanotubes on side polished fiber as a universal saturable absorber for various laser output states |
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Authors: | Jaekwon Ko Hwanseong Jeong Sun Young Choi Fabian Rotermund Dong-Il Yeom Byoung Yoon Kim |
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Institution: | 1. Department of Physics, KAIST, 291, Daehak-ro, Yuseong-gu, Daejeon, 34141, South Korea;2. Department of Physics and Department of Energy Systems Research, Ajou University, Worldcup-ro, Yeongtong-gu, Suwon, 16499, South Korea |
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Abstract: | We demonstrated four different laser operational states in the same passive fiber ring laser cavity by controlling solely the polarization state in a saturable absorber. The demonstrated laser operational states were continuous wave, mode-locking, Q-switching, and Q-switched mode-locking. The saturable absorber was fabricated by spin-coating a single-walled carbon nanotubes (SWCNT)/polymer composite on a side polished fiber providing enhanced nonlinear interaction with the SWCNT. The wide tuning range of the saturable absorber allows the simple means to generate different forms of laser output from a single laser cavity. |
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Keywords: | Single-walled carbon nanotubes Passive fiber lasers Mode locked lasers Q-switched lasers |
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