Developing a High Resolution Laser Linewidth Measurement System for the ATTA Project
نویسندگان
چکیده
The ATTA project has been created in order to laser cool and count single atoms of low level krypton contamination in xenon, motivated by the XENON Dark Matter program. An important component of the ATTA system is the laser, and its linewidth must be smaller than that of the atomic transition of the krypton atom to be trapped. An experiment was developed in order to measure this linewidth. A driver was tested and calibrated for use with a pre-made Fabry-Perot interferometer. The driver was successfully used in order to measure key characteristics of the Fabry-Perot, along with the linewidth of the laser. A photodiode circuit was tested and improved upon so that the light from the Fabry-Perot could be analyzed. The noise from this circuit was reduced significantly, though at the end of the experiment, ambient noise was still affecting the signal from the Fabry-Perot and photodiode system.
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