Active alignment technique of an off-axis beam expander

Ziyan Huang; Delvin Poh; Wei Lin Puah; Mun Hong Loke; Yan Ying Cheah

doi:10.1117/12.3015990

17 June 2024 Active alignment technique of an off-axis beam expander

Ziyan Huang, Delvin Poh, Wei Lin Puah, Mun Hong Loke, Yan Ying Cheah

Proceedings Volume 13021, Optical Fabrication and Testing VIII; 1302106 (2024) https://doi.org/10.1117/12.3015990
Event: SPIE Optical Systems Design, 2024, Strasbourg, France

Abstract

Catoptrical systems fall into 2 broad categories: On-Axis and Off-Axis. The alignment of off-axis mirror-based optical systems are non-trivial compared to conventional on-axis mirror designs because of the lack of a central optical axis. To align an off-axis mirror-based laser beam expander (consisting of 2 off-axis parabolic mirrors), we have developed an alignment technique that is systematic, quantitative, and reproducible. This is a quick and efficient method of alignment that is based on wavefront sensing and its corresponding correction based on the Zernike polynomial coefficients. In this paper, we highlight the key elements of the beam expander’s design and detail the steps of the opto-mechanical alignment process as well as the performance results of the system after successful alignment.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Ziyan Huang, Delvin Poh, Wei Lin Puah, Mun Hong Loke, and Yan Ying Cheah "Active alignment technique of an off-axis beam expander", Proc. SPIE 13021, Optical Fabrication and Testing VIII, 1302106 (17 June 2024); https://doi.org/10.1117/12.3015990

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