Diode Laser Frequency Stabilities Obtained by Frequency and Zeeman Modulation Methods
摘要
The extended cavity diode lasers were stabilized using the first and third derivatives obtained by the frequency modulation method from the hyperfine resonances of the 87Rb D2 transition line. The frequency stability values were measured as 3.1 × 10-12, 5.6 × 10-13, and 1.9 × 10-12 for integration times of 1, 102, and 104 s, respectively, using the first derivatives of F=1 → F′=1 and F=1 → F′=2 resonances. By use of the third derivatives of F=2 → F′=1,3 and F=2 → F′=2,3 cross-over resonances, 4.0 × 10-12 − 1 s, 5.7 × 10-13 − 102 s, 9.3 × 10-13 − 104 s frequency stability values were obtained. These values compared with the results of the previous study obtained by the Zeeman modulation method.