Development of a stretched absolute wavelength standard using dichroic atomic vapor spectroscopy towards observation of light-induced drift

Abstract

Abstract An absolute wavelength standard broader than the Doppler width of the atomic absorption signal was developed by using a method called dichroic atomic vapor spectroscopy (DAVS). DAVS is known as a method to obtain an error signal for stabilization of laser wavelength, called dichroic atomic vapor laser locking (DAVLL). In the DAVS, a magnetic field is applied to the atomic vapor cell and a stretched signal is obtained by the Zeeman effect. The DAVS experiment was performed by using ring-type permanent magnets and a cesium vapor cell at room temperature, and the placement and number of magnets were optimized. By measuring the height of the DAVS signal calibrated in advance, continuous monitoring of the absolute laser wavelength become possible. The developed system is suitable to be used as a stretched wavelength standard in the experiment of the light-induced drift.