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PIER PIER B PIER C PIER M PIER Letters PIER Photonics
2008-10-16
Deastigmatism and Circularization of an Elliptical Gaussian Beam by off -Axis Ellipsoid Reflector Based off -Focus Configuration
By
Shan Yang,

    Dr. Shan Yang

    Beihang University

    China

    Homepage

Ming Bai,

    Professor Ming Bai

    School of Electronic Information Engineering

    Beihang University

    China

    Homepage

Jungang Miao

    Dr. Jungang Miao

    School of Electronics and Information Engineering

    Beihang University

    China

    Homepage

Progress In Electromagnetics Research B, Vol. 10, 91-103, 2008
doi:10.2528/PIERB08090502 | Google Scholar

Abstract
Off-axis ellipsoid reflector based off-focus configuration for deastigmatism and circularization of an elliptical Gaussian beam is proposed. Mostly used off-axis ellipsoid reflector based conventional configuration is constructed by aligning the incident direction directed to one focus of the ellipsoid, which reflect the output beam to the another focus of the ellipsoid. However, such configuration is unavailable to deastigmatize and circularize an elliptical Gaussian beam. Therefore, the coupling efficiency between the reflected beam and an essentially circular beam is not well satisfied. In this case, an off-axis ellipsoid reflector based off-focus configuration is proposed to obtain better coupling efficiency. Different from the conventional configuration, in the proposed off-focus configuration, the incident beam direction is diverged from one focus of the ellipsoid. As a result, the coupling efficiency of no less than 99.9% (as compared with coupling efficiency of about 94.2% based on conventional configuration) can be obtained, which is verified with numerical calculations.
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Citation
Shan Yang, Ming Bai, and Jungang Miao, "Deastigmatism and Circularization of an Elliptical Gaussian Beam by off -Axis Ellipsoid Reflector Based off -Focus Configuration," Progress In Electromagnetics Research B, Vol. 10, 91-103, 2008.
doi:10.2528/PIERB08090502
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