Digital Laser Frequency Control and Phase-Stabilization Loops in a High Precision Space-Borne Metrology System

Hechenblaikner, Gerald; Wand, Vinzenz; Kersten, Michael; Danzmann, K.; Díaz, Antonio; Heinzel, Gerhard; Nofrarias, M.; Steier, Frank

doi:10.1109/jqe.2011.2108637

Cited by 22 publications

(28 citation statements)

References 21 publications

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“…In addition, it is used to actively stabilize the optical pathlength difference (OPD) between fibres [20] and, since its information may be shaped by the noise, its relevant information is found on its control signal rather than on the signal itself. In figure 6, the OPD control signal shows how the reference interferometer is sensitive to each of the heat injection series applied.…”

Section: Response Of the Static Interferometers To Heat Inputsmentioning

confidence: 99%

Thermo-elastic induced phase noise in the LISA Pathfinder spacecraft

Gibert¹,

Nofrarias²,

Karnesis³

et al. 2015

Class. Quantum Grav.

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During the on-station thermal test campaign of the LISA Pathfinder, the diagnostics subsystem was tested in nearly space conditions for the first time after integration in the satellite. The results showed the compliance of the temperature measurement system, obtaining temperature noise around − − 10 K Hz 4 12 in the frequency band 1-30 mHz. In addition, controlled injection of heat signals to the suspension struts anchoring the LISA Technology Package (LTP) core assembly to the satellite structure allowed us to experimentally estimate, for the first time, the phase noise contribution through thermo-elastic distortion of the LTP interferometer, the satelliteʼs main instrument. Such contribution was found to be at − − 10 m Hz 12 1 2 , a factor of 30 below the measured noise at the lower end of the measurement bandwidth (1 mHz).

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Section: Response Of the Static Interferometers To Heat Inputsmentioning

confidence: 99%

Thermo-elastic induced phase noise in the LISA Pathfinder spacecraft

Gibert¹,

Nofrarias²,

Karnesis³

et al. 2015

Class. Quantum Grav.

Self Cite

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“…In a practical system this phase change could arise due to the expansion of a temperature sensitive component or the scan of an uneven surface [13]. Alternatively, it could originate from the longitudinal movement of a reflective test-mass as in the basic operating scheme of the LPF interferometer [9,10]. Because of the frequency difference between beam 1 and 2, the interferometer signals S 1 t and S 2 t display an oscillation at the heterodyne frequency f het with a different phase offset ϕ and similar amplitude A in for each interferometer:…”

Section: A Interferometer Schematicmentioning

confidence: 99%

Common mode noise rejection properties of amplitude and phase noise in a heterodyne interferometer

Hechenblaikner¹

2013

J. Opt. Soc. Am. A

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High precision metrology systems based on heterodyne interferometry can measure the position and attitude of objects to accuracies of picometer and nanorad, respectively. A frequently found feature of the general system design is the subtraction of a reference phase from the phase of the position interferometer, which suppresses low frequency common mode amplitude and phase fluctuations occurring in volatile optical path sections shared by both the position and reference interferometer. Spectral components of the noise at frequencies around or higher than the heterodyne frequency, however, are generally transmitted into the measurement band and may limit the measurement accuracy. Detailed analytical calculations complemented with Monte Carlo simulations show that high frequency noise components may also be entirely suppressed, depending on the relative difference of measurement and reference phase, which may be exploited by corresponding design provisions. While these results are applicable to any heterodyne interferometer with certain design characteristics, specific calculations and related discussions are given for the example of the optical metrology system of the LISA Pathfinder mission to space.

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“…Most importantly, it has been studied that the analog circuits have a much more significant long-term drift 11 which is crucial for the measurements at low frequency range that we are interested in. Recently, digital controllers have been used for laser frequency stabilizations in various applications [12][13][14][15][16] and have exhibited excellent performances.…”

Section: Introductionmentioning

confidence: 99%

A self-analyzing double-loop digital controller in laser frequency stabilization for inter-satellite laser ranging

Luo

Yeh

et al. 2015

Review of Scientific Instruments

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We present a digital controller specially designed for laser frequency stabilization in the application of inter-satellite laser ranging. The prototype of controller is developed using field programmable gate arrays programmed with National Instruments LabVIEW software. The controller is flexible, self-analyzing, and easily optimized with build-in system analysis. Application and performance of the controller to a laser frequency stabilization system designed for spaceborne scientific missions are demonstrated.

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Digital Laser Frequency Control and Phase-Stabilization Loops in a High Precision Space-Borne Metrology System

Cited by 22 publications

References 21 publications

Thermo-elastic induced phase noise in the LISA Pathfinder spacecraft

Thermo-elastic induced phase noise in the LISA Pathfinder spacecraft

Common mode noise rejection properties of amplitude and phase noise in a heterodyne interferometer

A self-analyzing double-loop digital controller in laser frequency stabilization for inter-satellite laser ranging

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