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Journal Article
Graphene-dispersed Polymer Waveguide for Efficient Formation of Mode-locked Lasers at Extremely Low Graphene Concentration
- Authors
- Bowon Ryu, Jin Tae Kim, Yong-Won Song
- Issue Date
- 2020-09
- Citation
- Carbon, v.166, pp.123-130
- ISSN
- 0008-6223
- Publisher
- Elsevier
- Language
- English
- Type
- Journal Article
- Project Code
- 20HB1900, Technology development of transmitter and receiver integrated module in a polarization based free-space quantum key distribution for short-range low-s, Youn Chun Ju
- Abstract
- Graphene-functioned mode-locked lasers have been the key elements in ultrafast optical data management. However, most conventional graphene mode-rely on deleterious transferred graphene that inefficiently interacts with the evanescent field of the propagating light. We demonstrate a polymer waveguide that contains reduced graphene oxide (rGO) particles to induce ?쐂irect?? interaction with a significantly improved efficiency at an rGO concentration of 8 × 10?닋4 wt%. By confirming the nonlinear saturable absorption and dispersion stability of the rGO crystals hosted in a commercially available polymer matrix by only a solution process, we obtained a femtosecond fiber laser passively functioned by the waveguide. The resultant laser displays a center wavelength, spectral width, repetition rate, extinction ratio, and temporal pulse duration of 1561.8 nm, 9.5 nm, 2.35 MHz, 83.19 dB, and 690 fs, respectively.
- KSP Keywords
- 5 nm, Center wavelength, Data Management, Graphene oxide(GOS), Improved efficiency, Mode-locked laser, Nonlinear saturable absorption, Pulse duration, Repetition rate, Ultrafast optical, dispersion stability