Abstract
This paper describes an auto-aligned femtosecond laser system controlled by genetic algorithm (GA). Femtosecond lasers have been developed rapidly, and generation of sub 10-fs pulses has been achieved by Kerr lens mode-locking. However, for femtosecond lasers, it is necessary to consider the nonlinear effect because the nonlinearity in the cavity is enhanced as the peak power increases. Therefore, we should optimize the alignment at the resolution on m, such as focus of concave mirrors if we change pump power. For the compensation of such nonlinearlity in laser cavity, we have proposed and established an auto- aligned laser system based on GA.1 GA is known as a robust search algorithm and effective for selection from enormous combinations. Genetic algorithm uses multiple chromosomes and applies natural selection-like operations to them in seeking improved solutions.2 We made the system based on precise and compact positioning actuators with μm resolution.
© 2002 Optical Society of America
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