Topic
Optical polarization
About: Optical polarization is a research topic. Over the lifetime, 13992 publications have been published within this topic receiving 244284 citations.
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TL;DR: It is shown that polarization fluctuations in the input fiber to an interferometric sensor can result in the generation of excess phase noise in the output.
Abstract: It is shown that polarization fluctuations in the input fiber to an interferometric sensor can result in the generation of excess phase noise in the output. Experimental observations of this phenomenon are compared with theoretical models, and the impact of this noise source in interferometric sensors is briefly discussed.
62 citations
23 Jun 2008
TL;DR: This work design active lighting and sensing systems for controlling light transport before image formation, and hence obtain higher quality data, and presents a technique of polarized light striping based on combining polarization imaging and structured lightstriping that out-performs different existing illumination and sensing methodologies.
Abstract: Poor visibility conditions due to murky water, bad weather, dust and smoke severely impede the performance of vision systems. Passive methods have been used to restore scene contrast under moderate visibility by digital post-processing. However, these methods are ineffective when the quality of acquired images is poor to begin with. In this work, we design active lighting and sensing systems for controlling light transport before image formation, and hence obtain higher quality data. First, we present a technique of polarized light striping based on combining polarization imaging and structured light striping. We show that this technique out-performs different existing illumination and sensing methodologies. Second, we present a numerical approach for computing the optimal relative sensor-source position, which results in the best quality image. Our analysis accounts for the limits imposed by sensor noise.
62 citations
TL;DR: In this paper, the authors discuss how other coherent scattering mechanisms, in particular interference and interaction between scatterers in the near field, influence brightness and polarization of complex ensembles of particles at small phase angles and demonstrate the contribution of different mechanisms to the scattering process in a model regolith described as an ensemble of wavelength-sized clusters as constituents.
62 citations
TL;DR: In this article, the authors demonstrate MDM data transmission using two OAM modes over 1.4 km of a specially designed ring core fiber without using full MIMO processing or optical polarization demultiplexing.
Abstract: Mode division multiplexing (MDM) systems using orbital angular momentum (OAM) modes can recover the data in D different modes without recourse to full (2 D × 2 D ) multiple input multiple output (MIMO) processing. One of the biggest challenges in OAM-MDM systems is the mode instability following fiber propagation. Previously, MIMO-free OAM-MDM data transmission with two modes over 1.1 km of vortex fiber was demonstrated, where optical polarization demultiplexing was employed in the setup. We demonstrate MDM data transmission using two OAM modes over 1.4 km of a specially designed ring core fiber without using full MIMO processing or optical polarization demultiplexing. We demonstrate reception with electrical polarization demultiplexing, i.e., minimal 2 × 2 MIMO, showing the compatibility of OAM-MDM with current polarization demultiplexing receivers.
62 citations
TL;DR: In this paper, a GHz message was successfully encoded in the chaotic transmitter and decoded from the receiver with polarization-preserved optical injection at only 330 MHz, and it has been demonstrated that GHz message extraction can be achieved using both normal and inverse chaos synchronization.
Abstract: Chaotic message encoding and decoding in unidirectionally coupled vertical-cavity surface-emitting lasers (VCSELs) with polarization-preserved and polarization-selected optical injection has been studied experimentally. A GHz message has been successfully encoded in the chaotic transmitter and decoded from the receiver with polarization-preserved optical injection. In contrast decoding using polarization-selected optical injection was achieved at only 330 MHz. It has also been demonstrated that GHz message extraction can be achieved using both normal and inverse chaos synchronization thus providing an opportunity for exploiting polarization properties of VCSELs for duplexed chaotic message transmission.
62 citations