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2012 BFY Abstract Detail Page

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Abstract Title: W34 - Doppler-Free Spectroscopy
Abstract: In this experiment a tuneable diode laser is used to explore a very narrow wavelength range of rubidium (Rb) near 780 nm. First the students tune the laser to the resonant frequency of Rb. Once resonance has been established a detector is placed in the beam exiting the Rb cell. With a little adjusting the fine structure of rubidium is observed on the scope. Next a technique known as saturation-absorption spectroscopy is employed. The students rearrange the optical setup such that three beams pass through the Rb cell; two in on direction and one in the other. Two opposing beams are adjusted to intersect inside the Rb cell without disturbing the third beam. Detectors collect the light from the two beams going the same direction. The signal from the undisturbed beam is subtracted from the intersected beam. The difference in signals is the hyperfine structure of Rb. Lastly the students set up a Michelson interferometer and use it to calibrate their data. For the full version of our manual go to:

Information on how to acquire the required equipment will be provided at the workshop.
Abstract Type: Workshop

Workshop Documents

Workshop Document: Download the Workshop Document
Workshop Document (2): Download the Workshop Document (2)

Author/Organizer Information

Primary Contact: Dean Hudek
Brown University