We propose to insert dynamic holographic materials inside laser resonators to build holographic self-adaptive filters. This principle is directly inspired by the research on resonant optical neural networks. From this idea, we design a longitudinal mode selector. We demonstrate its operation in a pulsed Ti:Sapphire laser and in a cw Nd:YVO4 laser. Spectacular increases of the laser coherence length are observed in both cases.

© 1999 Optical Society of America

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