Polarization insensitive graphene saturable absorbers using etched fiber for highly stable ultrafast fiber lasers.

Abstract

In this paper, we introduce a graphene-based saturable absorber (GSA) with high damage threshold employing symmetrical evanescent wave interaction for highly stable mode-locking of ultrafast fiber lasers. To enhance the evanescent wave interaction between the graphene layer and the propagating light, graphene flakes are mixed with polydimethylsiloxane (PDMS), and the graphene/PDMS composite is coated onto a chemically etched fiber. The GSA exhibits polarization insensitivity due to its symmetric cross-section, which enables stable operation against environmental disturbance such as stress, bending, and temperature variation. Finally, we demonstrate a fiber laser generating 216 fs pulses with an 80 dB signal-to-noise ratio.

DOI: 10.1364/OE.23.022116

5 Figures and Tables

Cite this paper

@article{Lee2015PolarizationIG, title={Polarization insensitive graphene saturable absorbers using etched fiber for highly stable ultrafast fiber lasers.}, author={Hyub Lee and Won Sik Kwon and Jin Hwan Kim and Daewon Kang and Soohyun Kim}, journal={Optics express}, year={2015}, volume={23 17}, pages={22116-22} }