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Proceedings Paper

Multi-segment tapered optical mirror for MEMS LiDAR application
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Paper Abstract

In this work, we present a novel and simple optical solution for MEMS LiDARs. The idea is based on increasing the collection optics throughput by removing the MEMS mirror from the path of the collected light, while inserting a multi-segment tapered structure to collect the light from a wide angle. The tapered also converts the large size optical spot captured to a small area compatible with the requirement of low detector noise dimensions. The expected improvement in the collected power is analyzed versus the tapering angle of a single tapered structure. A multi-segment optical system, or multiple tapered structure arranged in parallel, is also introduced allowing for the optimization of the acceptance angle and the power improvement ratio. Using a 3-segment mirror, the expected improvement is about 15x with an acceptance angle of ±30 degrees. The design of a single element taper section is fabricated using aluminum-coated acrylic and tested experimentally showing an improvement of about 7x in the coupled power through an angle of ±10 degrees in good agreement with the theoretical expectations.

Paper Details

Date Published: 24 February 2017
PDF: 7 pages
Proc. SPIE 10096, Free-Space Laser Communication and Atmospheric Propagation XXIX, 100960O (24 February 2017); doi: 10.1117/12.2251330
Show Author Affiliations
Mostafa Abdelsalam, Ain Shams Univ. (Egypt)
Yasser Sabry, Ain Shams Univ. (Egypt)
Mazen Erfan, Ain Shams Univ. (Egypt)
Diaa Khalil, Ain Shams Univ. (Egypt)
Si-Ware Systems (Egypt)

Published in SPIE Proceedings Vol. 10096:
Free-Space Laser Communication and Atmospheric Propagation XXIX
Hamid Hemmati; Don M. Boroson, Editor(s)

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