Cavity linewidth narrowing by optical pumping-assisted electromagnetically induced transparency in V-type rubidium at room temperature

Abstract

A detailed experimental investigation is made in the intracavity V-type electromagnetically induced transparency (EIT) of the Rb atomic medium at room temperature. The optical pumping effect will increase the transparency for the V-type EIT at room temperature and therefore the cavity linewidth can be narrowed apparently. For the seven EITs observed in our previous study, cavity linewidth narrowing is observed in all of them. More importantly, we find that the cavity linewidth can keep at 1.2 MHz over a wide frequency range of 100 MHz by utilizing the central double-peak-structure EIT. This property provides a novel way for constructing a high resolution tunable frequency reference via the intracavity EIT.

Keywords:

• electromagnetically induced transparency; optical pumping effect; optical cavity; linewidth

Notes

This work was supported by the National Natural Science Foundation of China [Grant Nos. 11274112, 61108028 and 61178031], Shanghai Rising-Star Program [Grant No. 11QA1407400] and Fundamental Research Funds for the Central Universities [Grant No. WM1313003].