ABSTRACT
This chapter considers the radiation confined in a one dimensional cavity with two reflecting mirrors at the two ends of the cell of length. The moving atoms will interact with the two oppositely moving waves and the interaction is expected to lead to a hole by each wave depending on the detuning. Lamb dip or saturation absorption spectroscopy experiments on rubidium (Rb) are carried out with low power frequency tunable diode lasers. The laser frequency depends on laser temperature and laser current. The coarse tuning of the laser is provided by the temperature and current control. In the case of saturation absorption spectroscopy the laser radiation from the external cavity diode laser is split into two fractions by a beam splitter. The reflected part is sent to the Rb cell and constitutes the forward moving probe beam. The other fraction is transmitted through the beam splitter.
