Experiment nr. 3
Doppler-free Rb
saturation spectroscopy with an external cavity diode laser
Supervisor: Dr.
Christian Chmelik
In this experiment, an external
cavity diode laser is used to perform
laser spectroscopy of rubidium atoms. With the experimental set-up
available, the Doppler broadened optical absorption lines (linear
spectroscopy) are measured first. Thereafter, one applies the technique
of saturated absorption spectroscopy to study the lines with resolution
beyond the Doppler limit (nonlinear spectroscopy). This enables to
measure the hyperfine splittings of one of the excited states of
rubidium. A Fabry-Perot interferometer will be used to calibrate the
frequency scale for the measurements.
• Operation of External Cavity Diode
Laser
• Operation of
Fabry-Perot-Interferometer
• Difference between linear and
non-linear spectroscopy
• Measurement and analysis of the
Doppler-broadened
780
nm rubidium spectral line
• Measurement and analysis of the
Doppler-free adsorption line
• Verifying the energy levels
• Calculation of the Doppler
broadening
• Calculation of the hyperfine
coupling constants
description
of this
experiment
