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Yb- and Er-doped fiber laser Q-switched with an optically uniform, broadband WS2 saturable absorber | | M. Zhang
; G. Hu
; G. Hu
; R. C. T. Howe
; L. Chen
; Z. Zheng
; T. Hasan
; | | Date: |
12 Jul 2015 | | Abstract: | We demonstrate a ytterbium (Yb) and an erbium (Er)-doped fiber laser
Q-switched by a solution processed, optically uniform, few-layer tungsten
disulfide saturable absorber (WS2-SA). Nonlinear optical absorption of the
WS2-SA in the sub-bandgap region, attributed to the edge-induced states, is
characterized by 3.1% and 4.9% modulation depths with 1.38 and 3.83 MW/cm2
saturation intensities at 1030 and 1558 nm, respectively. By integrating the
optically uniform WS2-SA in the Yb- and Er-doped laser cavities, we obtain
self-starting Q-switched pulses with microsecond duration and kilohertz
repetition rates at 1030 and 1558 nm. Our work demonstrates broadband
sub-bandgap saturable absorption of a single, solution processed WS2-SA,
providing new potential efficacy for WS2 in ultrafast photonic applications. | | Source: | arXiv, 1507.3188 | | Services: | Forum | Review | PDF | Favorites | |
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