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http://inaoe.repositorioinstitucional.mx/jspui/handle/1009/691| All-Fiber pulsed lasers based on carbon nanotubes | |
| IVAN HERNANDEZ ROMANO | |
| DANIEL ALBERTO MAY ARRIOJA JOSE JAVIER SANCHEZ MONDRAGON | |
| Acceso Abierto | |
| Atribución-NoComercial-SinDerivadas | |
| Fibre lasers Laser mode locking Nanotubes | |
| Compact sources of short pulses with high-repetition-rates are highly desirable for a wide range of applications such as optical coherent tomographic, metrology, optical communication, two photon microscopy, and optical clocks. This thesis is focus on the research and development of fiber lasers that emit short optical pulses. Here we purpose to use Polydimethylsiloxane (PDMS) and SU8-2075 polymers to fabricate thin films doped with SWCNTs that work like a saturable absorber. Moreover, the nonlinear behavior of these films was investigated by using an all-fiber power dependent transmission setup. Using this setup a PDMS/SWCNT film (thickness 200 μm) and SU8-2075 film (thickness 100 μm) were tested. The saturation intensity and the modulation depth of the PDMS/SWCNT and SU8-2075 films are 5.1 MW/cm2, 0.7MW/cm2, 12.3 % and 10 %, respectively. Passively mode-locked Erbium fiber ring lasers have been implemented by using PDMS/SWCNT and SU8-2075 films, the first one produces pulses at a repetition rate of 22.73 MHz with a pulse duration of 1.26 ps assuming a sech2 pulse profile. The second one has a repetition rate of 21.27 MHz with a pulse duration of 871 fs assuming a sech2 pulse profile. A hybrid mode-locked Erbium-doped fiber laser that provides very short pulse-widths while achieving high repetition rates is proposed and experimentally demonstrated. This hybrid configuration is realized by using a PDMS/SWCNT thin film composite as saturable absorber, which is inserted within an active mode-locked laser system using angled connectors. Therefore, the effect of the PDMS/SWCNT composite is to effectively narrow the width of the pulses generated by the active system without modifying its repetition rate. A pulse-width of 730 fs was generated at a repetition rate of 4 GHz, while achieving an average output power of 4 mW. A reduction in the noise of the photodetected RF spectrum was also observed in the hybrid system. Finally, a passively-Q-switching laser has also been built up by using a SU8-2075/SWCNT film. The maximum average power, peak power, and pulse energy were 160 μW, 7.3 mW, and 5.1 nJ, respectively. | |
| Instituto Nacional de Astrofísica, Óptica y Electrónica | |
| 2011-10 | |
| Tesis de doctorado | |
| Inglés | |
| Estudiantes Investigadores Público en general | |
| Hernandez-Romano I. | |
| ÓPTICA | |
| Versión aceptada | |
| acceptedVersion - Versión aceptada | |
| Aparece en las colecciones: | Doctorado en Óptica |
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| HernandezRoI.pdf | 6.32 MB | Adobe PDF | Visualizar/Abrir |