The dependence of single-wall carbon nanotubes-based saturable absorber (SWCNTs SA) on concentration and thickness for mode-locked laser pulse formation is comprehensively investigated. The peak absorption wavelength of SWCNTs SA is engineered within the gain band-width of erbium-doped fiber centered near 1550 nm. The optima full-width half-maximum (FWHM) of pulses was obtained as the concentrations of SWCNTs SA was 0.05 wt%. This indicates that the laser pulse become shorter as the concentration of SWCNTs SA increases. The result also showed that the FWHM of pulses from 3.43 to 1.85 ps were found as the thickness of SWCNTs SA increased from 8 to 100 um. This also indicates that the laser pulse become shorter as the thickness of SWCNTs SA increases. However, the pulse width significantly broadened as concentration increased to 0.1 wt% and became stable as thickness of SWCNTs SA increased from 100 to 264 um for passively mode-locked lasers. An in-depth study on the optimum fabrication of concentration and thickness of SWCNTs SA for laser pulse formation may allow developing a cost-effective mode-locked laser with high performance as well as broadly benefit to the utilization of many other low-cost nanodevices.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0709109-191710 |
| Date | 09 July 2009 |
| Creators | Haung, Zih-shun |
| Contributors | Yi-Chung Huang, Chao-Yung Yeh, Chao-Kuei Lee, Jiang-Jen Lin, Wood-Hi Cheng |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | Cholon |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0709109-191710 |
| Rights | not_available, Copyright information available at source archive |
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