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Q-Switched and Mode-Locked Erbium-Doped Fiber Lasers Using Antimony Telluride (Sb2Te3) Saturable Absorbers

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In this paper, passively Q-switched and mode-locked erbium-doped fiber lasers (EDFLs) are experimentally demonstrated by using Antimony Telluride (Sb2Te3) Topological Insulator (TI) as a thin film based saturable absorber (SA). Liquid phase exfoliation (LPE) method is used to fabricate the SA by embedding the Sb2Te3 into polyvinyl alcohol (PVA) film. Q-switched pulse laser is produced at the 1530.749 nm wavelength region at a low threshold pump power of 15 mW. The repetition rate of the laser increased from 27.53 to 95.06 kHz, while the pulse width decreased from 13.84 μs to 4.89 μs as the pump power raised from 15 mW to 81 mW. The maximum pulse energy of 45.87 nJ is obtained at the maximum pump power. By adding an additional single mode fiber (SMF) section into the laser cavity, the mode-locked pulse train is generated at 1533.40 nm wavelength with 3 dB bandwidth of 2.7 nm. The mode-locked pulse laser is stabilized at a pump power range of 71 mW to 143 mW with pulse width and repetition rate of 6.52 ps and 996 kHz, respectively. The average output power, pulse energy, peak power and the signal to noise (SNR) ratio are 6.5 mW, 6.526 nJ, 1 kW and 67 dB respectively.
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Keywords: ANTIMONY TELLURIDE; ERBIUM-DOPED FIBER LASERS; MODE-LOCKED; Q-SWITCHED; TOPOLOGICAL INSULATORS

Document Type: Research Article

Publication date: August 1, 2019

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  • Journal of Nanoelectronics and Optoelectronics (JNO) is an international and cross-disciplinary peer reviewed journal to consolidate emerging experimental and theoretical research activities in the areas of nanoscale electronic and optoelectronic materials and devices into a single and unique reference source. JNO aims to facilitate the dissemination of interdisciplinary research results in the inter-related and converging fields of nanoelectronics and optoelectronics.
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