Observation of Zeeman shift in the rubidium D2 line using an optical nanofiber in vapor
Observation of Zeeman shift in the rubidium D2 line using an optical nanofiber in vapor
复制标题
DOI：
10.1117/12.2027163
复制
发表时间：
2012-08
期刊：
影响因子：
--
通讯作者：
Amy Watkins;V. B. Tiwari;J. Ward;K. Deasy;S. Nic Chormaic
中科院分区：
文献类型：
--
作者：
Amy Watkins;V. B. Tiwari;J. Ward;K. Deasy;S. Nic Chormaic
We report on the observation of a Zeeman shift (order of 100 MHz) of the Doppler-broadened D2 transition of both 85Rb and 87Rb isotopes via transmission through a 400 nm diameter optical nanofiber in the presence of a DC magnetic field. Linearly-polarized light propagating in the nanofiber is analyzed as a superposition of two orthogonally circularly polarized orientations, σ+ and σ-. In the absence of the magnetic field, the absorption of these polarizations by the atomic vapor, via the evanescent field at the waist of the nanofiber, is degenerate. When a weak magnetic field is applied parallel to the propagating light, this degeneracy is lifted and relative shifts in the resonance frequencies are detected. Typical linear shift rates of 1.6 MHz/G and -2.0 MHz/G were observed. We also demonstrate a dichroic atomic vapor laser lock line shape by monitoring the real-time subtraction of the two magnetically-shifted absorption spectra. This is particularly interesting for magneto-optical experiments as it could be directly implemented for diode laser frequencystabilization.
