Obscuration-Free Pupil-Plane Phase Locking of A Coherent Array of Fiber Collimators
Journal of the Optical Society of America A
Control methods and system architectures that can be used for locking in phase of multiple laser beams that are generated at the transmitter aperture plane of a coherent fiber-collimator array system (pupil-plane phase locking) are considered. In the proposed and analyzed phase-locking techniques, sensing of the piston phase differences is performed using interference of periphery (tail) sections of the laser beams prior to their clipping by the fiber-collimator transmitter apertures. This obscuration-free sensing technique eliminates the need for a beam splitter being directly located inside the optical train of the transmitted beams—one of the major drawbacks of large-aperture and/or high-power fiber-array systems. Numerical simulation results demonstrate efficiency of the proposed phase-locking methods.
Copyright © 2010, Optical Society of America
Optical Society of America
Place of Publication
Vorontsov, Mikhail; Lachinova, Svetlana; Beresnev, Leonid A.; and Weyrauch, Thomas, "Obscuration-Free Pupil-Plane Phase Locking of A Coherent Array of Fiber Collimators" (2010). Electro-Optics and Photonics Faculty Publications. 95.