Femtosecond pulse generation with voltage-controlled graphene saturable absorber

Abstract

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 ${\mathrm{Cr}}^{4+}$:forsterite laser operating at 1255 nm. The nonlinear optical response of the graphene supercapacitor was further investigated by using pump–probe spectroscopy.

© 2014 Optical Society of America

Graphene-gold supercapacitor as a voltage controlled saturable absorber for femtosecond pulse generation

Isinsu Baylam, Osman Balci, Nurbek Kakenov, Coskun Kocabas, and Alphan Sennaroglu
Opt. Lett. 41(5) 910-913 (2016)

Femtosecond pulse generation from a Ti³⁺:sapphire laser near 800  nm with voltage reconfigurable graphene saturable absorbers

Isınsu Baylam, Sarper Ozharar, Nurbek Kakenov, Coskun Kocabas, and Alphan Sennaroglu
Opt. Lett. 42(7) 1404-1407 (2017)

Graphene mode-locked multipass-cavity femtosecond Cr⁴⁺: forsterite laser

Sarper Ozharar, Isinsu Baylam, M. Natali Cizmeciyan, Osman Balci, Ercag Pince, Coskun Kocabas, and Alphan Sennaroglu
J. Opt. Soc. Am. B 30(5) 1270-1275 (2013)

Broadband terahertz modulators using self-gated graphene capacitors

Nurbek Kakenov, Osman Balci, Emre O. Polat, Hakan Altan, and Coskun Kocabas
J. Opt. Soc. Am. B 32(9) 1861-1866 (2015)

Graphene mode-locked femtosecond Cr:ZnSe laser at 2500 nm

M. N. Cizmeciyan, J. W. Kim, S. Bae, B. H. Hong, F. Rotermund, and A. Sennaroglu
Opt. Lett. 38(3) 341-343 (2013)