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Nonlinear absorption of SWNT film and its effects to the operation state of pulsed fiber laser
We study a single-wall carbon nanotube (SWNT) Polyvinyl alcohol (PVA) composite as a saturable absorber (SA) for pulse generation in Yb-doped fiber lasers. The saturable absorption and optical limiting (OL) characteristics of the SWNT device are investigated. By combing these two nonlinear effects, we find out for the first time, to the best of our knowledge, that mode-locking can be obtained in the dissipative soliton regime at low pumping followed by Q-switching at high pumping, which isdoi:10.1364/oe.22.017227 pmid:25090536 fatcat:btjsyvjfpfbc3div4lmrg4gmfi