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Optical Engineering • Open Access

Fiber-integrated tungsten disulfide saturable absorber (mirror) for pulsed fiber lasers

Paper Abstract

We propose two schemes for achieving tungsten disulfide (WS2)-based saturable absorber (SA) and saturable absorber mirror (SAM). By utilizing the pulsed laser deposition method, we grow the WS2 film on microfiber to form an evanescent field interaction SA device. Incorporating this SA device into a common ring-cavity erbium-doped fiber (EDF) laser, stably passive mode-locking can be achieved with pulse duration of 395 fs and signal-to-noise ratio of 64 dB. We also produce a fiber tip integrated WS2 -SAM by utilizing the magnetron sputtering technique (MST). This new type of SAM combines the WS2 layer as SA and gold mirror as high reflective mirror. By employing the WS2 -SAM, we construct the linear-cavity EDF lasers, and achieve passive mode-locking operation with pulse duration of ∼1  ns and SNR of ∼61  dB. We further achieve stably passive Q-switching operation with pulse duration of ∼160  ns and pulse energy of 54.4 nJ. These fiber-integrated SAs and SAMs have merits of compactness and reliability, paving the way for the development of new photonic devices such as SAs for pulsed laser technology.

Paper Details

Date Published: 29 March 2016
PDF: 10 pages
Opt. Eng. 55(8) 081318 doi: 10.1117/1.OE.55.8.081318
Published in: Optical Engineering Volume 55, Issue 8
Show Author Affiliations
Hao Chen, Shenzhen Univ. (China)
Ling Li, Shenzhen Univ. (China)
Shuangchen Ruan, Shenzhen Univ. (China)
Tuan Guo, Jinan Univ. (China)
Peiguang Yan, Shenzhen Univ. (China)

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