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We demonstrate a mode-locked nanosecond erbium-doped fiber laser (EDFL) using a graphene-based saturable absorber (SA). The laser directly produces nanosecond pulses with pulse duration of 24ns, repetition rate of 5.78MHz and central wavelength of 1569.5nm. The mode-locking is self-starting and the pulse train has no transient effects or signs of Q-switched behavior. The formation mechanism of nanosecond...
We demonstrate a passively Q-switched erbium-doped fiber laser (EDFL) based on graphene as a saturable absorber (SA). Two fiber Bragg gratings (FBGs) are used as the end mirrors in an all-fiber linear cavity. The Q-switched EDFL has a pump threshold of 68.2 mW. The minimum pulse duration is 0.85 μs and the highest pulse energy is 40.9 nJ. The pulse repetition rate of the fiber laser can be widely...
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