Abstract

We demonstrate coherent beam combining and adaptive mitigation of atmospheric turbulence effects over 7 km under strong scintillation conditions using a coherent fiber array laser transmitter operating in a target-in-the-loop setting. The transmitter system is composed of a densely packed array of 21 fiber collimators with integrated capabilities for piston, tip, and tilt control of the outgoing beams wavefront phases. A small cat’s-eye retro reflector was used for evaluation of beam combining and turbulence compensation performance at the target plane, and to provide the feedback signal for control of piston and tip/tilt phases of the transmitted beams using the stochastic parallel gradient descent maximization of the power-in-the-bucket metric.

© 2016 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Comparative efficiency analysis of fiber-array and conventional beam director systems in volume turbulence

Mikhail Vorontsov, Grigory Filimonov, Vladimir Ovchinnikov, Ernst Polnau, Svetlana Lachinova, Thomas Weyrauch, and Joseph Mangano
Appl. Opt. 55(15) 4170-4185 (2016)

Experimental demonstration of coherent beam combining over a 7 km propagation path

Thomas Weyrauch, Mikhail A. Vorontsov, Gary W. Carhart, Leonid A. Beresnev, Andrey P. Rostov, Ernst E. Polnau, and Jony Jiang Liu
Opt. Lett. 36(22) 4455-4457 (2011)

Speckle-metric-optimization-based adaptive optics for laser beam projection and coherent beam combining

Mikhail Vorontsov, Thomas Weyrauch, Svetlana Lachinova, Micah Gatz, and Gary Carhart
Opt. Lett. 37(14) 2802-2804 (2012)

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 (4)

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 (1)

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