TITLE

Coherent beam addition of GaAlAs lasers by binary phase gratings

AUTHOR(S)
Leger, James R.; Swanson, Gary J.; Veldkamp, Wilfrid B.
PUB. DATE
April 1986
SOURCE
Applied Physics Letters;4/7/1986, Vol. 48 Issue 14, p888
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A general technique for combining laser beams coherently using binary gratings has been developed. Experiments were performed with lasers from a monolithic linear GaAlAs array. The grating transmittance profile was designed to convert the light beams from the array into a single beam with high efficiency. Optical feedback through the grating locked the lasers together in proper relative phase. The far-field diffraction pattern of the sum was practically identical in shape to that of a single laser. Coupling efficiencies greater than 80% appear to be feasible with this technique. The method is applicable to a variety of laser systems (gas, solid state, etc.) and is readily extendable to a two-dimensional array of lasers.
ACCESSION #
9819475

 

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