期刊
OPTICAL FIBER TECHNOLOGY
卷 48, 期 -, 页码 117-122出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.yofte.2018.12.002
关键词
Mode-locked; Q-switched; EDFL; Bismuth-selenide; Topological insulator
资金
- University of Malaya [PG005-2016A]
- Ministry of Higher Education Malaysia
- Universiti Teknologi Malaysia [R.J130000.7826.4F928]
We experimentally demonstrate Q-switched and mode-locked Erbium-doped fiber laser (EDFL) by using topological insulator (TI) Bismuth Selenide (Bi2Se3) as saturable absorber (SA). The fabricated Bi2Se3 SA exhibits modulation depth and saturation intensity at 39.8% and 90.2 MW/cm(2), respectively. By incorporating the fabricated Bi2Se3 SA into the laser cavity, Q-switching operation is generated with repetition rate ranging from 23.5 kHz to 68.2 kHz, pulse width ranging from 2.4 mu s to 8.6 mu s and maximum peak power is calculated at 19.9 mW. Our cavity can also generate soliton mode-locked pulse with repetition rate of 23.3 MHz and pulse width of 0.63 ps by inserting an additional 5 m long single mode fiber (SMF) into the existing laser cavity. Spectral peaks due to Kelly side-bands and four wave mixing (FWM) were observed on the soliton spectrum. Both Q-switching and mode-locking pulses are stable in the laboratory environment, allowing the realization of compact and low cost pulsed fiber laser with Bi2Se3 SA for various photonics applications.
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