Desaceleração de um feixe atomico de Ca com laser de diodo de frequencia dobrada

AUTOR(ES)
DATA DE PUBLICAÇÃO

1998

RESUMO

This work presents the results of a calcium atomic bean deceleration using a frequency-doubled diode laser. The diode laser produces single-mode output power of 150 mW at a maximum injection current of 160 mA. The nonlinear crystal used for second harmonic generation is the KnbO3 by noncritical and type I phase matching process. For l =845 nm the phase matching occur at T = - 15° C. The doubling frequency system for the diode-laser was built at the laboratory, with the nonlinear crystal placed inside a passive optical ring cavity that enhances the laser beam power by of 70 mW produced an output of 12.5 mW at the blue light wavelength. The deceleration eletronic transition of calcium is the S0 ® P1 corresponding to l = 422.6 nm and the Doppler effect is compensed by the Zeeman effect technique. The suitable magnetic field gradient is achieved with a magnet coil that provides Bmax = 825 Gauss. Evidence of atomic beam deceleration with counterpropagating frequency-doubled diode laser beam is obtained by monitoring the fluorescence signal effects on the deceleration process

ASSUNTO(S)

feixes atomicos espectroscopia de laser otica não-linear

ACESSO AO ARTIGO

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