Frequency and amplitude modulation of a cw-dye laser for measuring hyperfine frequency separations in optogalvanic spectra of La-139 I

Kumar P. V. Kiran; Srikanth G.

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Frequency and amplitude modulation of a cw-dye laser for measuring hyperfine frequency separations in optogalvanic spectra of La-139 I

机译：CW-染料激光器测量LA-139 I的恒孔频谱频率分离的频率和幅度调节

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This paper describes frequency modulation of a cw-dye laser to generate a frequency-discriminant dispersive signal by phase-sensitive detection of the optogalvanic signal in a lanthanum hollow cathode lamp. The frequencies of the six major hyperfine components in 5d(2)6(s) F-4(9/2) (4121.572 cm(-1)) ->(579.13nm) 5d(2)6p(4)F(9/2) (21384.0 cm(-1)) transition in La-139 I were measured with an accuracy of 50 MHz, using a calibrated wavemeter after locking the cw-dye laser frequency to the dispersive error signal of the constituent hyperfine component. The measured hyperfine separations are found to be consistent with separations measured using the standard amplitude modulation technique and also with earlier reported results. The relative ease of the optical setup for locking of the cw-dye laser to optogalvanic spectra can be adapted to atomic physics applications for stabilization of laser frequency in the visible region. (C) 2021 Optical Society of America

机译：本文通过对镧空心阴极灯中的光电流信号进行相敏检测，对连续染料激光器进行频率调制，以产生鉴频色散信号。在将连续染料激光频率锁定到组成超精细成分的色散误差信号后，使用校准波长计，以50 MHz的精度测量了La-139 I中5d（2）6（s）F-4（9/2）（4121.572 cm（-1））->（579.13 nm）5d（2）6p（4）F（9/2）（21384.0 cm（-1））跃迁中六个主要超精细成分的频率。发现测量的超精细分离与使用标准振幅调制技术测量的分离一致，也与早期报告的结果一致。将连续染料激光器锁定到光电流光谱的光学装置相对容易，可适用于稳定可见光区域激光频率的原子物理应用。（2021）美国光学学会

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《Applied optics》 |2021年第12期|共10页
作者
Kumar P. V. Kiran; Srikanth G.;
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Bhabha Atom Res Ctr Natl Ctr Composit Characterizat Mat ECIL PO Hyderabad 500062 India;

Bhabha Atom Res Ctr Natl Ctr Composit Characterizat Mat ECIL PO Hyderabad 500062 India;

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Frequency and amplitude modulation of a cw-dye laser for measuring hyperfine frequency separations in optogalvanic spectra of La-139 I

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