For the first time of our knowledge, we demonstrate the graphene oxide as a saturable absorber (SA) in the passive mode-locking of a diode pumped Tm 3+ -doped laser. Broadly spectral region sub-10 ps mode-locking in a Tm:YAlO3 (Tm:YAP) laser near 2 µm were obtained. With a pump power of 8.64 W, the average output power of 268 mW with the maximum pulse energy of 3.7 nJ at the pulse repetition frequency (PRF) of 71.8 MHz was obtained.

No abstract

No abstract

No abstract

No abstract

We report on a diode-pumped passively continuous wave (cw) mode-locked Tm:YAP laser with a double-wall carbon nanotube (DWCNT) absorber operating at a wavelength of 2023 nm for the first time, to the best our knowledge. The DWCNT absorber is fabricated on a hydrophilic quartz substrate by using the vertical evaporation technique. The output power is as high as 375 mW. A stable pulse train with a repetition rate of 72.26 MHz is generated with a highest single pulse energy of 5.2 μJ.

No abstract

By using single-walled carbon nanotubes as the saturable absorber fabricated by a vertical evaporation method, passive mode-locking of a Nd:GdVO 4 laser was realized in a W-type folded cavity. The laser generated 8 ps pulses at a repetition rate of 81 MHz. At 10.4 W of the incident pump power, average output power of 1.22 W was achieved and the corresponding peak power and energy of a single pulse were 1.88 kW and 15 nJ, respectively.