【摘要】 光外差－塞曼调制磁旋转光谱技术是一种高灵敏的吸收光谱技术。它同时对激光频率和样品的塞曼效应进行调制， 然后通过双解调来提取微弱的光谱信号。文内导出了该信号的数学表达式， 并对影响线型和灵敏度的多种物理参数进行了分析， 获得了与实验相符合的结果。更多还原

【Abstract】 Optical heterodyne Zeeman modulation magnetic rotation spectroscopy (OHZM MRS) is a high sensitive spectroscopy technique. In this spectroscopy, both laser frequency and Zeeman effect of a sample are modulated, and then the signal with high signal to noise will be obtained by double demodulation. The expression of OHZM MRS signal is derived, and the influences on the line shape of OHZM MRS are discussed by the extinction coefficient of polarizers, ellipticity, phase shift induced by elliptical polarization, φ angle (where φ is the small uncrossing angle between two nearly crossed polarizers) and residual amplitude modulation. The results of theory and experiment are in agreement each other.更多还原