Strong hyperfine spectra of I-127(2) at 633 nm and frequency stabilized tunable diode laser

In this paper, five groups of stronger hyperfine transitions of iodine mole cule (I-127(2)) are reported, which are to our knowledge first observed by us. Frequency separations and relative intensities of each transition are c alculated. The calculated results and the observed values match very well. With the calculated results, we assigned the vib-rotational bands of each t ransition. Because the intensities of the newly observed transitions are hu ndreds of times stronger than transition R(127)11-5, which is applied to fr equency-stabilized He-Ne laser, pre use them as reference lines of iodine f requency stabilized tunable diode laser and get an output laser of 3 mW. Th is kind of frequency-stabilized diode laser may become a new kind of freque ncy standard.