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Open AccessArticle

Bi2Te3 Topological Insulator for Domain-Wall Dark Pulse Generation from Thulium-Doped Fiber Laser

1
Advanced Photonics Research Institute, Gwangju Institute of Science and Technology, 123 Cheomdangwagi-ro, Buk-gu, Gwangju 61005, Korea
2
Defence R&D Center, Hanwha Corporation, 305 Pangyo-ro, Bundang-gu, Seongnam-si, Gyeonggi-do 13488, Korea
*
Author to whom correspondence should be addressed.
Crystals 2019, 9(7), 337; https://doi.org/10.3390/cryst9070337
Received: 31 May 2019 / Revised: 23 June 2019 / Accepted: 28 June 2019 / Published: 29 June 2019
(This article belongs to the Special Issue Recent Advances in Novel Topological Materials)
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Abstract

We have experimentally demonstrated domain-wall (DW) dark pulses from a thulium-doped fiber laser incorporating a topological insulator saturable absorber (SA). The bulk-structured Bi2Te3 was used as the SA, which was constructed on a fiber ferrule platform through the deposition of the Bi2Te3 mixed with distilled water. The DW dark pulses were generated from the thulium-doped fiber laser cavity with a dual wavelength at 1956 nm and 1958 nm. The dark pulse width and the repetition rate were measured as ~10.3 ns and ~20.7 MHz over the pump power of ~80 mW, respectively. To the best of our knowledge, this work is the first demonstrated generation of the DW dark pulse from a thulium-doped fiber laser using nanomaterial-based SA. View Full-Text
Keywords: Bi2Te3; topological insulator; domain-wall dark pulses; fiber lasers Bi2Te3; topological insulator; domain-wall dark pulses; fiber lasers
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Koo, J.; Ashok, N.; Kim, D.H.; Shin, W. Bi2Te3 Topological Insulator for Domain-Wall Dark Pulse Generation from Thulium-Doped Fiber Laser. Crystals 2019, 9, 337.

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