Experimental Demonstration of Frequency Autolocking an Optical Cavity Using a Time-Varying Kalman Filter

Medientyp: Sonstige Veröffentlichung; E-Artikel

Titel: Experimental Demonstration of Frequency Autolocking an Optical Cavity Using a Time-Varying Kalman Filter

Beteiligte: Schütte, Dirk [Verfasser:in]; Hassen, S.Z. Sayed [Verfasser:in]; Karvinen, Kai S. [Verfasser:in]; Boyson, Toby K. [Verfasser:in]; Kallapur, Abhijit G. [Verfasser:in]; Song, Hongbin [Verfasser:in]; Petersen, Ian R. [Verfasser:in]; Huntington, Elanor H. [Verfasser:in]; Heurs, Michèle [Verfasser:in]

Erschienen: College Park, MD : American Physical Society, 2016

Ausgabe: published Version

Sprache: Englisch

DOI: https://doi.org/10.15488/12020; https://doi.org/10.1103/PhysRevApplied.5.014005

ISSN: 2331-7019

Schlagwörter: Time-varying Kalman filter ; Locks (fasteners) ; Linear time invariant controller ; Linear time varying ; Two term control systems ; Controllers ; Experimental demonstrations ; Time varying control systems ; Controller designs ; Kalman filters ; Singular perturbation method ; Linear control systems ; Perturbation techniques ; Proportional integral controllers ; Linear quadratic regulator

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Beschreibung: We propose and demonstrate a new autolocking scheme using a three-mirror ring cavity consisting of a linear quadratic regulator and a time-varying Kalman filter. Our technique does not require a frequency scan to acquire resonance. We utilize the singular perturbation method to simplify our system dynamics and to permit the application of linear control techniques. The error signal combined with the transmitted power is used to estimate the cavity detuning. This estimate is used by a linear time-varying Kalman filter which enables the implementation of an optimal controller. The experimental results validate the controller design, and we demonstrate improved robustness to disturbances and a faster locking time than a traditional proportional-integral controller. More important, the time-varying Kalman filtering approach automatically reacquires lock for large detunings, where the error signal leaves its linear capture range, a feat which linear time-invariant controllers cannot achieve. © 2016 American Physical Society.

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Experimental Demonstration of Frequency Autolocking an Optical Cavity Using a Time-Varying Kalman Filter - [published Version]

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