Ultrafast fiber laser based on bismuth telluride evanescent field mode-locked device

doi:10.37188/CO.2021-0216

CIOMP OpenIR

	Ultrafast fiber laser based on bismuth telluride evanescent field mode-locked device
	S.-D. Zhang and Y.-J. Geng
	2022
发表期刊	Chinese Optics
ISSN	20971842
卷号	15 期号:3 页码:433-442
摘要	In order to realize the passively harmonic mode-locking with high repetition rate in the fiber laser. A saturable absorber (SA) based on two dimensional (2D) topological insulators material of Bismuth telluride (Bi2Te3), combining with a side-polished fiber, was fabricated by laser deposition technology in this study. This device has a modulation depth of 23.96%, nonsaturable loss of 37.77% and saturable intensity of 31.5 MW/cm2. According to the adjustment of dispersion in the whole cavity and the excellent nonlinear saturable absorb character in topological insulator materials, a self-starting mode-locking is realized successfully when this SA device is applied in the Er-doped fiber laser, with a central wavelength of 1555.67 nm, pulse duration of 487 fs, repetition rate of 47.87 MHz and signal-to-noise ratio of 58 dB. A harmonic mode-locking is achieved when the pump power is over 150 mW. When we adjust and increase slightly the pump power till 250 mW, the harmonic mode-locking of 11 orders is achieved with the repetition rate of 528 MHz and the signal-to-noise ratio of 41.5 dB. These results demonstrate that with the evanescent field produced by the side-polished fiber, the damage threshold of materials can be improved and the passively harmonic mode-locking with high repetition rate is realized, which has a great significance for the materials in the application of ultrafast fiber laser with high repetition rate. Copyright 2022 Chinese Optics. All rights reserved.
DOI	10.37188/CO.2021-0216
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文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/67210
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	S.-D. Zhang and Y.-J. Geng. Ultrafast fiber laser based on bismuth telluride evanescent field mode-locked device[J]. Chinese Optics,2022,15(3):433-442.
APA	S.-D. Zhang and Y.-J. Geng.(2022).Ultrafast fiber laser based on bismuth telluride evanescent field mode-locked device.Chinese Optics,15(3),433-442.
MLA	S.-D. Zhang and Y.-J. Geng."Ultrafast fiber laser based on bismuth telluride evanescent field mode-locked device".Chinese Optics 15.3(2022):433-442.

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