Development of Frequency Stabilized Diode Laser Based on a Spectroscopic Study of Magnetically Induced Circular Dichroism of Atomic Rubidium

概要

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We developed a frequency-stabilized diode laser using magnetically induced circular dichroism. From a spectroscopic study of the Rb-$D_{2}$ line, the most stable Doppler-broadened and Doppler-free lines were found to be the transitions from the $F_{\text{g}}=2$ ground state of 85Rb and the crossover resonance from the $F_{\text{g}}=3$ ground state to the $F_{\text{e}}=3$ and 4 excited states of 85Rb, respectively. Furthermore, we measured the fluctuation of a laser locked to the Doppler-free line to be $\pm 50$ kHz/8 h and thus revealed the applicability to a long-term frequency stabilization. The laser developed can be used as a reference laser in a frequency stabilization system for multiple tunable lasers for resonance ionization mass spectrometry (RIMS) analysis.
2006-05-15