Passively Q-switched lasers at 1.06μm with graphene oxide and carbon nanotubes D2O dispersion

We have investigated the passive q-switching characteristics of graphene oxide (go) and single walled carbon nanotubes (swcnts) d2o (heavy water, deuteroxide) based on a diode-pumped yvo4/nd:yvo4 laser for the first time as far as we know. by using 20 mg/10 ml go d2o dispersion, pulses with minimum duration of 344 ns under a repetition rate of 550 khz were obtained. with 0.3 mg/10 ml swcnts d2o dispersion, a maximum pulse energy of 1.2 mu j with duration of 530 ns was achieved at a repetition rate of 178 khz. (c) 2014 elsevier b.v. all rights reserved.