Journal
OPTICS EXPRESS
Volume 23, Issue 1, Pages 154-164Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.23.000154
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Funding
- NSFC [61275144@ 61308049]
- Natural science fund of Guangdong province [S2013010012235]
- foundation for scientific and technical innovation in Higher Education of Guangdong [2013KJCX0161]
- Improvement and Development Project of Shenzhen Key Lab [ZDSY20120612094924467]
- Science and technology project of Shenzhen City [JCYJ20120613172042264, JCYJ20130329142040731, JCYJ20140418091413568, JCYJ20120613112423982]
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By utilizing the pulsed laser deposition (PLD) method, we fabricated a kind of microfiber-based topological insulator (TI) saturable absorber (SA) which has inherent merits of effective and robust properties. We also proposed a newly explanation for the impact of nonlinear effect of SA on the harmonic mode-locking (HML) behavior. Upon employing on the SA, we achieved stable fundamental mode-locking (FML) at central wavelength of 1562.4 nm with pulse duration as short as 320 fs. By adjusting the intracavity polarization state at maximum pump power of 395 mW, we obtained stable femtosecond harmonic soliton pulse generation with repetition rate of 2.95 GHz and output power of 45.3 mW. Our results demonstrated that the microfiber-based TI PLD film SA is a promising device for practical multi-GHz ultrashort pulses generation. (C) 2015 Optical Society of America
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