Implementation of side-fringe locking in an SHG cavity
Author(s)Moore, Sam, S.B. Massachusetts Institute of Technology
Massachusetts Institute of Technology. Department of Physics.
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An alternative method for locking a second-harmonic generation (SHG) cavity on resonance is described and implemented. The usual method, Pound-Drever-Hall locking, is prone to long-term power fluctuations from power variations in the incident laser. When using the second harmonic field for squeezing, these power fluctuations need to be stabilized with an additional control loop (usually a Mach-Zender interferometer). The alternative method, side-fringe locking, involves a simple DC offset on the second-harmonic signal at the desired power to generate the error signal. This thesis demonstrates the insensitivity of side-fringe locking to such long-term power fluctuations and that the noise spectrum is comparable to PDH locking-explained largely due to PZT noise length fluctuations off-resonance..
Thesis: S.B., Massachusetts Institute of Technology, Department of Physics, 2016.Pages 36-39 are missing. Cataloged from PDF version of thesis.Includes bibliographical references (pages 40-41).
DepartmentMassachusetts Institute of Technology. Department of Physics.
Massachusetts Institute of Technology