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  • Received: Dec. 12, 2013

    Accepted: Jan. 22, 2014

    Posted: Mar. 17, 2014

    Published Online: Mar. 17, 2014

    The Author Email:

    DOI: 10.3788/col201412.031403

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    N. Kasim, A. H., F. Ahmad, Y. Munajat, H. Ahmad, S. W.. Q-switched ytterbium doped fiber laser using multi-walled carbon nanotubes saturable absorber[J]. Chinese Optics Letters, 2014, 12(3): 031403

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Chinese Optics Letters, Vol. 12, Issue 3, 031403 (2014)

Q-switched ytterbium doped fiber laser using multi-walled carbon nanotubes saturable absorber

N. Kasim, A. H., F. Ahmad, Y. Munajat, H. Ahmad, and S. W.

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    Abstract

    A Q-switched ytterbium-doped fiber laser (YDFL) is proposed and demonstrated using a newly developed multi-walled carbon nanotubes polyethylene oxide (MWCNTs-PEO) film as a passive saturable absorber (SA). The saturable absorber is prepared by mixing the MWCNTs homogeneous solution into a dilute PEO polymer solution before it is left to dry at room temperature to produce thin film. Then the film is sandwiched between two FC/PC fiber connectors and integrated into the laser cavity for Q-switching pulse generation. The laser generates a stable pulse operating at wavelength of 1060.2 nm with a threshold pump power of 53.43 mW. The YDFL generates a stable pulse train with repetition rates ranging from 7.92 to 24.27 kHz by varying 980-nm pump power from 53.42 to 65.72 mW. At 59.55-mW pump power, the lowest pulse width and the highest pulse energy are obtained at 12.18 μs and 143.5 nJ, respectively.

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