Femtosecond pulse generation with voltage-controlled graphene saturable absorber
Baylam, M. N.
Polat, E. O.
Optical Society of America
Baylam, I., Cizmeciyan, M. N., Ozharar, S., Polat, E. O., Kocabas, C., & Sennaroglu, A. (2014). Femtosecond pulse generation with voltage-controlled graphene saturable absorber. Optics letters, 39(17), 5180-5183.
Please cite this item using this persistent URLhttp://hdl.handle.net/11693/12638
We report, for the first time to our knowledge, the demonstration of a graphene supercapacitor as a voltage-controlled saturable absorber for femtosecond pulse generation from a solid-state laser. By applying only a few volts of bias, the Fermi level of the device could be shifted to vary the insertion loss, while maintaining a sufficient level of saturable absorption to initiate mode-locked operation. The graphene supercapacitor was operated at bias voltages of 0.5-1V to generate sub-100 fs pulses at a pulse repetition rate of 4.51 MHz from a multipass-cavity Cr4+:forsterite laser operating at 1255 nm. The nonlinear optical response of the graphene supercapacitor was further investigated by using pump-probe spectroscopy. (C) 2014 Optical Society of America
- Department of Physics