Carbon-nanotube-based saturable absorbers for near infrared solid state lasers |
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| Authors: | Petr A. Obraztsov Anatoliy. A. Sirotkin Elena D. Obraztsova Yuri P. Svirko Sergey V. Garnov |
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| Affiliation: | 1. Department of Physics and Mathematics, University of Joensuu, Yliopistokatu 7, FI-80100, Joensuu, Finland
2. A. M. Prokhorov General Physics Institute of the Russian Academy of Sciences, 38 Vavilov Street, 119991, Moscow, Russia
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| Abstract: | We demonstrate the passive mode-locking of a diode-pumped Nd+3:YAG (central wavelength: 1.32 μm; pulse duration: 50 ps; output energy: up to 70 μJ) laser using a polymer film containing single-wall carbon nanotubes. The mode-locking regime is stable at a pump repetition rate of up to 1 kHz. We also investigate the temporal evolution of the light-induced absorption change of the polymer film containing carbon nanotubes in the spectral range of 1.3–1.5 μm by femtosecond time-resolved pump-probe measurements. The measurements reveal that light-induced transmission exhibits fast and slow components that last 280 fs and more than 10 ps, respectively. The third-order susceptibility of the polymer film containing single wall carbon nanotubes is as high as 10−11 esu. |
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