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Proceedings Paper

Non-polarization and non-absorbing beamsplitters for laser communications
Author(s): Keqi Zhang; Ali Smajkiewicz
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Paper Abstract

We report the most recent advances of optical beamsplitters for laser communications developed at Barr Associates. The challenges for meeting the two key requirements, polarization control and wavefront control, of the lasercom beamsplitters are discussed. It is demonstrated that in order to meet the two key requirements, the repeatability of the refractive indices and the thickness of the coatings need to be controlled within 0.3% and 0.1% respectively from run to run, and the coating stress need to be controlled to less than 25 MPa. The latest result of various lasercom beamsplitters will be presented. For a typical 50% reflection and 50% transmission beamsplitter at 22.5 degree angle of incidence, the s and p polarization split is less than 0.2% from 1540nm to 1575nm and the surface flatness of the beamsplitter after coating is less than 1/40th waves peak to valley at 632.8nm.

Paper Details

Date Published: 1 March 2006
PDF: 8 pages
Proc. SPIE 6105, Free-Space Laser Communication Technologies XVIII, 61050I (1 March 2006); doi: 10.1117/12.644885
Show Author Affiliations
Keqi Zhang, Barr Associates (United States)
Ali Smajkiewicz, Barr Associates (United States)

Published in SPIE Proceedings Vol. 6105:
Free-Space Laser Communication Technologies XVIII
G. Stephen Mecherle, Editor(s)

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