Abstract
We report laboratory experiments demonstrating a phase-compensating 70-mm-diameter aperture transceiver that comprises a hexagonally close-packed array of seven 23-mm-diameter fiber collimator subapertures. Other than the collimators, the transceiver uses only fiber optics, connected as a master oscillator–multiple amplifier. The master oscillator is a fiber-coupled 1.5-µm diode laser, which is split and fed to 1-W fiber amplifiers before it exits the collimators. To obtain a phase-coherent far field we control each subaperture’s phase by adjusting the current to its amplifier’s pump diodes in a multidither arrangement, maximizing the signal at the receiver. We achieve a diffraction-limited coherent beam combination in the far field that produces 1.4 W of power in the main lobe, in agreement with theory.
© 2005 Optical Society of America
Full Article | PDF ArticleMore Like This
Yamaç Dikmelik and Frederic M. Davidson
Appl. Opt. 44(23) 4946-4952 (2005)
Wolfgang M. Neubert, Klaus H. Kudielka, Walter R. Leeb, and Arpad L. Scholtz
Appl. Opt. 33(18) 3820-3830 (1994)
Svetlana L. Lachinova and Mikhail A. Vorontsov
J. Opt. Soc. Am. A 25(8) 1960-1973 (2008)