Abstract

We present a new technique for the fine alignment sensing of optical interferometers. Unlike conventional wavefront sensing systems, which use multielement photodiodes, this approach works with a single-element photodiode, in combination with a spatial light modulator (SLM) and digitally enhanced heterodyne interferometry. As all signals pass through a single photodetection and analog path, the technique exhibits high common-mode rejection to low frequency errors present in conventional systems. By changing the modulation pattern on the SLM, the technique can also be extended to sensing higher-order wavefront errors. In this paper, we demonstrate the technique experimentally and compare performance with a conventional heterodyne wavefront sensing system. This may improve and simplify alignment systems in space-based interferometers such as the planned LISA gravitational wave detector and provide a way to optimize the power in laser cavities not possible with the traditional segmented diode approach.

© 2017 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Laser link acquisition demonstration for the GRACE Follow-On mission

Danielle M. R. Wuchenich, Christoph Mahrdt, Benjamin S. Sheard, Samuel P. Francis, Robert E. Spero, John Miller, Conor M. Mow-Lowry, Robert L. Ward, William M. Klipstein, Gerhard Heinzel, Karsten Danzmann, David E. McClelland, and Daniel A. Shaddock
Opt. Express 22(9) 11351-11366 (2014)

Possible alternative acquisition scheme for the gravity recovery and climate experiment follow-on-type mission

Ziren Luo, Qinglan Wang, Christoph Mahrdt, Alexander Goerth, and Gerhard Heinzel
Appl. Opt. 56(5) 1495-1500 (2017)

Intersatellite range monitoring using optical interferometry

R. Pierce, J. Leitch, M. Stephens, P. Bender, and R. Nerem
Appl. Opt. 47(27) 5007-5019 (2008)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (10)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (6)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription