Experimental demonstration of deep frequency modulation interferometry

Katharina Sophie Isleif, Oliver Gerberding, Thomas S. Schwarze, Moritz Mehmet, Gerhard Heinzel, Felipe Guzmán Cervantes

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Experiments for space and ground-based gravitational wave detectors often require a large dynamic range interferometric position readout of test masses with 1 pm/√ precision over long time scales. Heterodyne interferometer schemes that achieve such precisions are available, but they require complex optical set-ups, limiting their scalability for multiple channels. This article presents the first experimental results on deep frequency modulation interferometry, a new technique that combines sinusoidal laser frequency modulation in unequal arm length interferometers with a non-linear fit algorithm. We have tested the technique in a Michelson and a Mach-Zehnder Interferometer topology, respectively, demonstrated continuous phase tracking of a moving mirror and achieved a performance equivalent to a displacement sensitivity of 250 pm/√ at 1 mHz between the phase measurements of two photodetectors monitoring the same optical signal. By performing time series fitting of the extracted interference signals, we measured that the linearity of the laser frequency modulation is on the order of 2% for the laser source used.

Original languageEnglish (US)
Pages (from-to)1676-1684
Number of pages9
JournalOptics Express
Volume24
Issue number2
DOIs
StatePublished - Jan 25 2016
Externally publishedYes

Fingerprint

frequency modulation
interferometry
interferometers
lasers
Mach-Zehnder interferometers
gravitational waves
dynamic range
linearity
photometers
optical communication
readout
topology
mirrors
interference
sensitivity
detectors

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Isleif, K. S., Gerberding, O., Schwarze, T. S., Mehmet, M., Heinzel, G., & Cervantes, F. G. (2016). Experimental demonstration of deep frequency modulation interferometry. Optics Express, 24(2), 1676-1684. https://doi.org/10.1364/OE.24.001676

Experimental demonstration of deep frequency modulation interferometry. / Isleif, Katharina Sophie; Gerberding, Oliver; Schwarze, Thomas S.; Mehmet, Moritz; Heinzel, Gerhard; Cervantes, Felipe Guzmán.

In: Optics Express, Vol. 24, No. 2, 25.01.2016, p. 1676-1684.

Research output: Contribution to journalArticle

Isleif, KS, Gerberding, O, Schwarze, TS, Mehmet, M, Heinzel, G & Cervantes, FG 2016, 'Experimental demonstration of deep frequency modulation interferometry', Optics Express, vol. 24, no. 2, pp. 1676-1684. https://doi.org/10.1364/OE.24.001676
Isleif KS, Gerberding O, Schwarze TS, Mehmet M, Heinzel G, Cervantes FG. Experimental demonstration of deep frequency modulation interferometry. Optics Express. 2016 Jan 25;24(2):1676-1684. https://doi.org/10.1364/OE.24.001676
Isleif, Katharina Sophie ; Gerberding, Oliver ; Schwarze, Thomas S. ; Mehmet, Moritz ; Heinzel, Gerhard ; Cervantes, Felipe Guzmán. / Experimental demonstration of deep frequency modulation interferometry. In: Optics Express. 2016 ; Vol. 24, No. 2. pp. 1676-1684.
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