Abstract
Self-mode locking effect in a wideband tunable graphene-based passively -switched erbium-doped fiber laser has been observed experimentally. -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 -switched erbium-doped fiber laser with a tunable range from 1522 nm to 1568 nm is demonstrated experimentally.
©2012 Optical Society of America
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