A general method of producing multielement amplifiers having a single output beam is described. The basic building blocks for these are either Michelson interferometers or Mach-Zehnder interferometers modified by the inclusion of gain in at least one arm of the interferometer. Demonstration of these multielement interferometric power amplifiers using broad-area AlGaAs gain elements and a single-mode AlGaAs master oscillator is described.
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John R. Andrews (1989) studied this question.
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