Polarization independent FP tunable filter
- Aug 29, 2021
- 1 min read
Updated: Feb 1
Liquid crystal Fabry–Perot tunable filters are investigated in detail, with special attention to their manufacturability, design, tolerances, and polarization independence.
Abstract
Liquid crystal Fabry–Perot tunable filters are investigated in detail, with special attention to their manufacturability, design, tolerances, and polarization independence. The calculations were performed both numerically and analytically using the 4×4 propagation matrix method. A simplified analytic expression for the propagation matrix is derived for the case of nematic LC in the homogeneous geometry. At normal incidence, it is shown that one can use the 2×2 Abeles matrix method; however, at oblique incidence, the 4×4 matrix method is needed. The effects of dephasing originating from wedge or noncollimated light beams are investigated. Due to the absorption of the indium tin oxide layer and as an electrode, its location within the mirror multilayered stack is very important. The optimum location is found to be within the stack and not on its top or bottom. Finally, we give more detailed experimental results of our polarization-independent configuration that uses polarization diversity with a Wollaston prism.
© 2014 Optical Society of America
Read the Full Research Article
👉Investigation of liquid crystal Fabry–Perot tunable filters: design, fabrication, and polarization independence: https://www.osapublishing.org/ao/abstract.cfm?uri=ao-53-29-H91
This is such a insightful piece, and the more I reflect on it, the more I find myself agreeing with your perspective on polarization independent operation. You’ve managed to articulate something that has truly made this concept click for me in a way no other explanation has before. It’s like a lightbulb went off! The mental shift you described regarding polarization independent filtering, where one starts to see it as a core principle rather than an add-on, absolutely resonated with my own experience https://www.abc.net.au/news/ I remember struggling with similar concepts until I approached them from this angle. It's fascinating how a different framing can unlock understanding. This post feels like a masterclass, and I'm genuinely grateful for the clarity it…