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

Hao Chen; Ling Li; Shuangchen Ruan; Tuan Guo; Peiguang Yan

doi:10.1117/1.OE.55.8.081318

29 March 2016 Fiber-integrated tungsten disulfide saturable absorber (mirror) for pulsed fiber lasers

Hao Chen, Ling Li, Shuangchen Ruan, Tuan Guo, Peiguang Yan

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Optical Engineering, Vol. 55, Issue 8, 081318 (March 2016). https://doi.org/10.1117/1.OE.55.8.081318

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 WS₂film 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.

CC BY: © The Authors. Published by SPIE under a Creative Commons Attribution 4.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

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Hao Chen, Ling Li, Shuangchen Ruan, Tuan Guo, and Peiguang Yan "Fiber-integrated tungsten disulfide saturable absorber (mirror) for pulsed fiber lasers," Optical Engineering 55(8), 081318 (29 March 2016). https://doi.org/10.1117/1.OE.55.8.081318

Published: 29 March 2016

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