Decoupling of coherent gaussian beams with general astigmatism

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Nemes, George
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The Optical Society of America
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We show how to decouple a coherent Gaussian beam having general astigmatism (to transform it into a beam having only simple astigmatism, or orthogonal symmetry) by using a single rotated thin cylindrical lens. The resulting coherent orthogonal Gaussian beam may be further transformed into a stigmatic (rotationally symmetric) Gaussian beam by an orthogonal telescopic magnifier. The initial beam parameters must be known; we suggest a procedure for their measurement.
© 1993 The Optical Society of America. J. Serna acknowledges a grant from the Spanish Programa Nacional de Formacion de Personal Investigator and financial support from the Comisión Interministerial de Ciencia y Tecnología of Spain under Project ROB 90-539. He thanks P. M. Mejías and R. Martínez-Herrero for their help and valuable suggestions. G. Nemeş acknowledges his sponsorship by International Research and Exchanges Board, the National Science Foundation (grant ECS- 92-09081), and the U.S. Air Force Office of Scientific Research (contract F49620-92-J-0229). He thanks A. E. Siegman for the excellent working conditions in his laboratory.
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