Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Photonic crystals for polarisation diversity circuits

Not Accessible

Your library or personal account may give you access

Abstract

Controlling the polarization of light in a waveguide-based photonic circuit is a notoriously difficult task. Any incoming state of polarization decomposes into a transverse electric (TE) and transverse magnetic (TM) mode, both of which typically travel with different propagation constants. The obvious way to address this problem is to design polarization independent devices. These are indeed available, but they require tight tolerances to ensure that the two propagation constants are equal. As circuits become more densely integrated and waveguide cross-sections grow smaller, these tolerances are even harder to meet, so polarization independence is increasingly difficult to achieve. In the extreme, i.e. the nanophotonics context, with waveguide cross-sections of a few 100 nm, polarization independence is almost impossible to realize in practice. The solution then lies in the polarization diversity approach, whereby the incoming signal is separated according to polarization and the two are treated independently from then on [1,2]. Implementing polarization diversity requires a polarization splitter and a polarization rotator. While several concepts for polarization splitters are available [3,4], realizing an efficient polarization rotator, especially on a micrometre-size lengthscale, is a difficult task. Here, we demonstrate efficient polarization rotation on nanophotonic lengthscales (< 2 μm) with a device based on photonic crystal concepts [6].

© 2005 Optical Society of America

PDF Article
More Like This
A Polarization Diversity Circuit for Silicon Photonics

Jing Zhang, Huijuan Zhang, Shiyi Chen, Mingbin Yu, G. Q. Lo, and Dim Lee Kwong
JThA019 National Fiber Optic Engineers Conference (NFOEC) 2011

Integrated Optical Circuits For Polarisation-Entangled Photons

A. Crespi, L. Sansoni, F. Sciarrino, G. Vallone, R. Ramponi, R. Osellame, and P. Mataloni
ED_P6 European Quantum Electronics Conference (EQEC) 2011

Novel Sources for Polarisation Squeezing and Polarisation Entanglement using Photonic Crystal Fibres

Josip Milanovic, Mikael Lassen, Michael Fortsch, Christoph Marquardt, Ulrik L. Andersen, and Gerd Leuchs
EA4_3 European Quantum Electronics Conference (EQEC) 2009

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved