外文题目: All-optical phase shifter and switch near 1550nm using tungsten disulfide (WS2) deposited tapered fiber
作者: Wu, Kan; Guo, Chaoshi; Wang, Hao; Zhang, Xiaoyan; Wang, Jun; Chen, Jianping
刊名: Opt. Express
年: 2017 卷: 25 期: 15 页： 17639--17649
英文关键词:

SATURABLE ABSORBER; TOPOLOGICAL INSULATOR; BLACK PHOSPHORUS; GRAPHENE MODULATOR; LASER; ABSORPTION; PHOTONICS; MOSE2; YB
英文摘要:
All-optical phase shifters and switches play an important role for various all-optical applications including all-optical signal processing, sensing and communication. In this paper, we demonstrate a fiber all-optical phase shifter using few-layer 2D material tungsten disulfide (WS2) deposited on a tapered fiber. WS2 absorbs injected 980 nm pump (control light) and generates heat, which changes the refractive index of both WS2 and tapered fiber due to thermo-optic effect and achieves a maximum phase shift of 6.1 pi near 1550 nm. The device has a loss of 3.7 dB. By constructing a Mach-Zehnder interferometer with WS2 based phase shifter in one arm, an all-optical switch is also obtained with an extinction ratio of 15 dB and a rise time of 7.3 ms. This all fiber low-cost and compact optical phase shifter and switch demonstrates the potential of 2D transition metal dichalcogenides for all-optical signal processing devices.


文献类型: 期刊论文
正文语种: English
收录类别: SCI
DOI: 10.1364/OE.25.017639


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