Required minimum cavity dispersion in stable, graphene mode-locked, Yb-doped fiber lasers
We have numerically investigated the required minimum cavity dispersion (RMCD) for obtaining stable pulses in net normal dispersion, graphene mode-locked, Yb-doped fiber lasers (YDFLs). By solving the modified nonlinear Schrödinger equation, we have found that the value of the RMCD was mainly affected by the nonsaturable absorption losses in the graphene saturable absorber (SA), and when monolayer graphene was used as the SA, this value was less than that obtained using multilayer graphene as the SA. We have also found that monolayer graphene YDFLs were more suitable for generating high-power, narrow-width pulses than were multilayer graphene YDFLs.
KeywordsFiber laser Graphene saturable absorber Ultrashort pulse Cavity dispersion Nonsaturable absorption loss
This research was supported by grants from the National Natural Science Foundation of China (Grant numbers 11374089, 61605040, 11074065, and 61308016), the Hebei Natural Science Foundation (Grant numbers F2017205162, F2017205060, F2016205124, and F2012205076), the Science Foundation of Hebei Normal University (Grant number L2016B07), and the Graduate Scientific Innovative Foundation of Hebei Province Department of Education Fund (Grant number sj2016024).
- 11.Yamashita, S., Inoue, Y., Maruyama, S., Murakami, Y., Yaguchi, H., Jablonski, M., Set, S.Y.: Saturable absorbers incorporating carbon nanotubes directly synthesized onto substrates and fibers and their application to mode-locked fiber lasers. Opt. Lett. 29(14), 1581–1583 (2004)ADSCrossRefGoogle Scholar
- 16.Keller, U., Weingarten, K.J., Kärtner, F.X., Kopf, D., Braun, B., Jung, I.D., Fluck, R., Hönninger, C., Matuschek, N., Au, D.: J.A.: Semiconductor saturable absorber mirrors (SESAMs) for femtosecond and nanosecond pulse generation in solid-state lasers. IEEE J. Sel. Top. Quantum Electron. 2(3), 435–453 (1996)CrossRefGoogle Scholar
- 22.Rosa, H.G., Castañeda, J.A., Cruz, C.H.B., Padilha, L.A., Gomes, J.C.V., Thoroh de Souza, E.A., Fragnito, H.L.: Controlled stacking of graphene monolayer saturable absorbers for ultrashort pulse generation in erbium-doped fiber lasers. Opt. Mater. Express. 7(7), 2528–2537 (2017)CrossRefGoogle Scholar
- 24.Kieu, K., Wise, F.W.: Self-similar and stretched-pulse operation of erbium-doped fiber lasers with carbon nanotubes saturable absorbers. In: Conference on lasers and electro-optics (Optical Society of America, 2009), paper CML3Google Scholar