Harmonic Mode-Locked Fiber Laser based on Photonic Crystal Fiber Filled with Topological Insulator Solution

Photonics

Yu-Shan Chen¹  Pei-Guang Yan¹  Hao Chen¹  Ai-Jiang Liu¹ 

[1]Shenzhen Key Laboratory of Laser Engineering, Key Laboratory of Advanced Optical Precision Manufacturing Technology of Guangdong Higher Education Institutes, College of Optoelectronic Engineering, Shenzhen University, Shenzhen, Guangdong 518060, China

关键词: Topological Insulator;    photonic crystal fiber;    mode-locked fiber laser;    evanescent wave;    harmonic mode-locking;   

DOI  :  10.3390/photonics2020342

来源: mdpi

【 摘 要 】

We reported that the photonic crystal fiber (PCF) filled with TI:Bi₂Te₃ nanosheets solution could act as an effective saturable absorber (SA). Employing this TI-PCF SA device; we constructed an ytterbium-doped all-fiber laser oscillator and achieved the evanescent wave mode-locking operation. Due to the large cavity dispersion; the fundamental mode-locking pulse had the large full width at half maximum (FWHM) of 2.33 ns with the repetition rate of ~1.11 MHz; and the radio frequency (RF) spectrum with signal-to-noise ratio (SNR) of 61 dB. In addition; the transition dynamics from a bunched state of pulses to harmonic mode-locking (HML) was also observed; which was up to 26th order.

【 授权许可】

CC BY   
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