Positive Reinforcement for Lasers: The Dichroic Atomic Vapour Laser Lock
Date
2023-09-19
Authors
Sandner, Owen
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Abstract
A Dichroic Atomic Vapour Laser Lock (DAVLL) is built. By utilizing the Zeeman splitting of doppler-broadened atomic resonances, the frequency of an external cavity diode laser is stabilized exactly to the resonant frequency of rubidium. Using a rubidium cell designed by a previous student researcher, a repeatable, effective and robust control loop is developed and refined. The effectiveness is quantified using the dual DAVLL setup presented by Kristan Corwin (1998), and the range of frequencies to which a laser can be locked is measured. It is shown that the DAVLL is an inexpensive laser stabilization scheme that rarely loses its lock point.
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Keywords
physics, laser, laser stabilization, frequency stabilization, feedback control, control