Obscuration-free pupil-plane phase locking of a coherent array of fiber collimators
JOSA A, Vol. 27, Issue 11, pp. A106-A121 (2010)
http://dx.doi.org/10.1364/JOSAA.27.00A106
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Abstract
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.
© 2010 Optical Society of America
OCIS Codes
(010.1080) Atmospheric and oceanic optics : Active or adaptive optics
(010.7350) Atmospheric and oceanic optics : Wave-front sensing
(140.3290) Lasers and laser optics : Laser arrays
(140.3510) Lasers and laser optics : Lasers, fiber
(220.0220) Optical design and fabrication : Optical design and fabrication
(140.3298) Lasers and laser optics : Laser beam combining
History
Original Manuscript: March 30, 2010
Revised Manuscript: August 9, 2010
Manuscript Accepted: August 11, 2010
Published: September 17, 2010
Citation
Mikhail A. Vorontsov, Svetlana L. Lachinova, Leonid A. Beresnev, and Thomas Weyrauch, "Obscuration-free pupil-plane phase locking of a coherent array of fiber collimators," J. Opt. Soc. Am. A 27, A106-A121 (2010)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-27-11-A106
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