https://scholars.lib.ntu.edu.tw/handle/123456789/500065
標題: | Stable mode-locked fiber laser based on CVD fabricated graphene saturable absorber | 作者: | Huang, P.L. Lin, S.-C. Yeh, C.-Y. Kuo, H.-H. Huang, S.-H. Lin, G.-R. Li, L.-J. Su, C.-Y. GONG-RU LIN |
公開日期: | 2012 | 卷: | 20 | 期: | 3 | 起(迄)頁: | 2460-2465 | 來源出版物: | Optics Express | 摘要: | A stable mode-locked fiber laser (MLFL) employing multi-layer graphene as saturable absorber (SA) is presented. The multi-layer graphene were grown by chemical vapor deposition (CVD) on Ni close to A-A stacking. Linear absorbance spectrum of multi-layer graphene was observed without absorption peak from 400 to 2000 nm. Optical nonlinearities of different atomic-layers (7-, 11-, 14-, and 21-layers) graphene based SA are investigated and compared. The results found that the thicker 21-layer graphene based SA exhibited a smaller modulation depth (MD) value of 2.93% due to more available density of states in the band structure of multilayer graphene and favored SA nonlinearity. A stable MLFL of 21-layer graphene based SA showed a pulsewidth of 432.47 fs, a bandwidth of 6.16 nm, and a time-bandwidth product (TBP) of 0.323 at fundamental solitonlike operation. This study demonstrates that the atomic-layer structure of graphene from CVD process may provide a reliable graphene based SA for stable soliton-like pulse formation of the MLFL. © 2012 Optical Society of America. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84863066788&doi=10.1364%2fOE.20.002460&partnerID=40&md5=0eb6bec5c43c0098d8f4fdc64b4a37ea | DOI: | 10.1364/OE.20.002460 | SDG/關鍵字: | Bandwidth; Chemical vapor deposition; Fiber lasers; Graphene; Nonlinear optics; Solitons; Absorption peaks; CVD process; Density of state; Linear absorbance; Modulation depth; Non-Linearity; Optical nonlinearity; Pulse formation; Pulsewidths; Saturable absorbers; Soliton-like; Time-bandwidth products; Mode-locked fiber lasers; graphite; nanoparticle; absorption; article; chemistry; computer aided design; equipment; equipment design; fiber optics; instrumentation; laser; Absorption; Computer-Aided Design; Equipment Design; Equipment Failure Analysis; Fiber Optic Technology; Graphite; Lasers; Nanoparticles |
顯示於: | 電機工程學系 |
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