RESUMO
We present our results on transfer of cold (87)Rb atoms from a vapor cell magneto-optical trap to ultrahigh vacuum magneto-optical trap (UHV-MOT) using a red-detuned continuous wave push beam in a double-magneto-optical trap setup. We find that use of retro-reflected red-detuned push laser beam results in higher number in UHV-MOT than the number obtained without retro-reflection of push beam.
RESUMO
An analysis of the increase in the beam-propagation factor, M2, of a higher order transverse mode beam caused by quartic phase aberration after transmission through a spherically aberrated lens is reported. The analysis shows that for a given beam size, the increase in the M2 parameter is less for a higher order transverse mode beam as compared to that for a diffraction limited beam. Experimental results using a multimode laser diode beam show good agreement with the theoretical results.
RESUMO
It is shown that for a detuned, single-mode, homogeneously broadened laser, semiclassical laser theory predicts a transition from a nonlasing state to a lasing state when cavity losses are increased for a range of cavity detunings when dispersion is large. A physical explanation for this behavior is presented in which the influence of dispersion on the cavity resonance frequencies is considered.
RESUMO
A new pumping geometry for longitudinal excitation of a grazing-incidenceg rating dye laser is proposeda nd experimentally demonstrated.
RESUMO
Simultaneous single-mode emission at two wavelengths, independently tunable over various rotational lines of the 9- and 10-microm bands, has been obtained from a dual-cavity hybrid CO(2) laser. An attractive feature of this system is the accomplishment of good temporal overlap of the two emissions by straightforward adjustment of low-pressure section parameters.
