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| Author(s): |
David da Silva Leocadio Figueira
Total Authors: 1
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| Document type: | Master's Dissertation |
| Press: | Campinas, SP. |
| Institution: | Universidade Estadual de Campinas (UNICAMP). Instituto de Física Gleb Wataghin |
| Defense date: | 2004-12-20 |
| Examining board members: |
Flávio Caldas da Cruz;
Marcelo Martinelli;
Lucila Helena Deliesposte Cescato
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| Advisor: | Flávio Caldas da Cruz |
| Abstract | |
This thesis presents the development of sources of coherent radiation in the blue region of the spectrum, based on semiconductors lasers, to excite the cooling and trapping 1S0-1P1 transition of neutral calcium atoms at 423nm. A diode laser emitting at g =846 nm was employed in an extended cavity Littman configuration, and stabilized in frequency by the Side-of-Fringe technique. Part of the laser power was amplified by an optical semiconductor amplifier. Output powers above 700mW at g =846nm were obtained. Part of this amplified power (450mW) was frequency doubled to g =423nm in a potassium niobate (KNbO3) crystal, placed inside a resonant optical cavity. The lock of the doubling optical cavity was made by the Hansch-Coulliaud technique. The developed system reached powers near 60mW of blue coherent radiation at 423nm. This portable laser source will be used for spectroscopy, cooling and trapping of calcium (AU) | |