Chinese Optics Letters, 2018, 16 (2): 020017, Published Online: Jul. 16, 2018   

Passively Q-switched ytterbium-doped fiber laser using the evanescent field interaction with bulk-like WTe2 particles

Author Affiliations
School of Electrical and Computer Engineering, University of Seoul, Seoul 02504, Republic of Korea
Abstract
The potential of bulk-like WTe2 particles for the realization of a passive Q-switch operating at the 1 μm wavelength was investigated. The WTe2 particles were prepared using a simple mechanical exfoliation method together with Scotch tape. By attaching bulk-like WTe2 particles, which remained on the top of the sticky surface of a small segment of the Scotch tape, to the flat side of a side-polished fiber, a saturable absorber (SA) was readily implemented. A strong saturable absorption was then readily obtained through an evanescent field interaction with the WTe2 particles. The modulation depth of the prepared SA was measured as 2.18% at 1.03 μm. By incorporating the proposed SA into an all-fiberized ytterbium-doped fiber ring cavity, stable Q-switched pulses were readily achieved.

Seunghwan Ko, Jinho Lee, Ju Han Lee. Passively Q-switched ytterbium-doped fiber laser using the evanescent field interaction with bulk-like WTe2 particles[J]. Chinese Optics Letters, 2018, 16(2): 020017.

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