Physics – Quantum Physics
Scientific paper
2008-09-03
Journal of Physics B: Atomic, Molecular and Optical Physics, vol. 42, 175501, 2009
Physics
Quantum Physics
18 pages, 9 figures
Scientific paper
This paper considers the application of integral Linear Quadratic Gaussian (LQG) optimal control theory to a problem of cavity locking in quantum optics. The cavity locking problem involves controlling the error between the laser frequency and the resonant frequency of the cavity. A model for the cavity system, which comprises a piezo-electric actuator and an optical cavity is experimentally determined using a subspace identification method. An LQG controller which includes integral action is synthesized to stabilize the frequency of the cavity to the laser frequency and to reject low frequency noise. The controller is successfully implemented in the laboratory using a dSpace DSP board.
Heurs M.
Huntington Elanor H.
Petersen Ian R.
Sayed Hassen S. Z.
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