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  • Title: Tunable graphene Q-switched erbium-doped fiber laser with suppressed self-mode locking effect.
    Author: Zhou DP, Wei L, Liu WK.
    Journal: Appl Opt; 2012 May 10; 51(14):2554-8. PubMed ID: 22614473.
    Abstract:
    Self-mode locking effect in a wideband tunable graphene-based passively Q-switched erbium-doped fiber laser has been observed experimentally. Q-switching is achieved by using graphene as a saturable absorber, while a tunable bandpass filter with a narrow bandwidth is used to obtain wideband tunability. We propose to suppress the modulation on each pulse from self-mode locking by introducing three subring resonators constructed with three 3 dB couplers into the laser ring cavity. Moreover, the laser output characteristics with respect to pump power are studied in detail. A stable Q-switched erbium-doped fiber laser with a tunable range from 1522 nm to 1568 nm is demonstrated experimentally.
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