Zhang, M; Kelleher, E J R; Torrisi, F; Sun, Z; Hasan, T; Popa, D; Wang, F; Ferrari, A C; Popov, S V; Taylor, J R
Optics express,
2012-Oct-22, 20121022, Letnik:
20, Številka:
22
Journal Article
We demonstrate mode-locking of a thulium-doped fiber laser operating at 1.94 μm, using a graphene-polymer based saturable absorber. The laser outputs 3.6 ps pulses, with ~0.4 nJ energy and an amplitude fluctuation ~0.5%, at 6.46 MHz. This is a simple, low-cost, stable and convenient laser oscillator for applications where eye-safe and low-photon-energy light sources are required, such as sensing and biomedical diagnostics.
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