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Interferometric observations of stars in late stages of stellar evolution and the impact of VLTI observations are discussed. Special attention is paid to the spectral information that can be derived from these observations and on the…

Astrophysics · Physics 2015-06-24 T. Bloecker , K. -H. Hofmann , G. Weigelt

A crucial challenge to the scaling up of linear optical interferometers is the presence of defective optical components resulting from inevitable imperfections in fabrication and packaging. This work presents a method for circumventing such…

Quantum Physics · Physics 2019-12-19 Ish Dhand

Recent FUSE and STIS observations of OVI absorption at low redshift along the sightline to distant quasars have been interpreted as the signature of a warm-hot diffuse component of the intergalactic medium (IGM). In these proceedings we…

Astrophysics · Physics 2007-05-23 Greg L. Bryan , Taotao Fang

This paper will review the technical progress of interferometric infrared observing techniques from the first 2-element interferometer 25 years ago to the 3+ element arrays now coming into service. To date, only the Infrared Spatial…

Astrophysics · Physics 2007-05-23 John D. Monnier

We present observations of a sample of Herbig AeBe stars, as well as the FU Orionis object V1057 Cygni. Our K-band (2.2 microns) observations from the Palomar Testbed Interferometer (PTI) used baselines of 110m and 85m, resulting in fringe…

Astrophysics · Physics 2009-11-10 F. P. Wilkin , R. L. Akeson

The secure transmission of the simultaneously transmitting and reflecting reconfigurable intelligent surface (STAR-RIS) aided communication system is investigated. Considering the coupled phase shifts of STAR-RISs and the fair secrecy…

Information Theory · Computer Science 2022-08-23 Zheng Zhang , Zhaolin Wang , Yuanwei Liu , Bingtao He , Lu Lv , Jian Chen

The ``optical springs'' regime of the signal-recycled configuration of laser interferometric gravitational-wave detectors is analyzed taking in account optical losses in the interferometer arm cavities. This regime allows to obtain…

General Relativity and Quantum Cosmology · Physics 2009-11-11 F. Ya. Khalili , V. I. Lazebny , S. P. Vyatchanin

Shape tracking of medical devices using strain sensing properties in optical fibers has seen increased attention in recent years. In this paper, we propose a novel guidance system for intra-arterial procedures using a distributed strain…

Medical Physics · Physics 2017-07-24 Francois Parent , Maxime Gerard , Raman Kashyap , Samuel Kadoury

Hyperatlas is an open standard intended to facilitate the large-scale federation of image-based data. The subject of hyperatlas is the space of sphere-to-plane projection mappings (the FITS-WCS information), and the standard consists of…

Astrophysics · Physics 2007-05-23 R. D. Williams , S. G. Djorgovski , M. T. Feldmann , J. C. Jacob

A new process for fabricating NiO exchange bias layers has been developed. The process involves the direct ion beam sputtering (IBS) of a NiO target. The process is simpler than other deposition techniques for producing NiO buffer layers,…

Condensed Matter · Physics 2009-10-28 Richard P. Michel , A. Chaiken , Young K. Kim , Lantz E. Johnson

The following exercises aim to learn the link between the object intensity distribution and the corresponding visibility curves of a long-baseline ptical interferometer. They are also intended to show the additional constraints on…

Interferometers play an increasingly important role for spatially resolved observations. If employed at full potential, interferometry can probe an enormous dynamic range in spatial scale. Interpretation of the observed visibilities…

Instrumentation and Methods for Astrophysics · Physics 2015-06-19 C. Brinch , C. P. Dullemond

We combine matter-wave interferometry and cavity optomechanics to propose a coherent matter--light interface based on mechanical motion at the quantum level. We demonstrate a mechanism that is able to transfer non-classical features…

Quantum Physics · Physics 2013-12-11 André Xuereb , Hendrik Ulbricht , Mauro Paternostro

Phase diffusion represents a crucial obstacle towards the implementation of high precision interferometric measurements and phase shift based communication channels. Here we present a nearly optimal interferometric scheme based on homodyne…

Optical interconnect is seen as a potential solution to meet the performance requirements of current and future generation of data processors. Optical interconnects have negligible frequency dependent loss, low cross talk and high band…

Emerging Technologies · Computer Science 2013-03-19 Sumita Mishra , Naresh K Chaudhary , Kalyan Singh

The design of a compact high-speed and wide field of view (FOV) receiver is challenging due to the presence of two well-known trade-offs. The first one is the area-bandwidth trade-off of photodetectors (PDs) and the second one is the…

In this paper, a thin film thickness gauge based on the interferometric principle of Y-shaped optical fiber is proposed to achieve accurate measurement of film thickness. In this paper, the optical fiber, the interferometric principle and…

We describe an optical fiber based interferometer to measure velocity profiles in sheared complex fluids using Dynamic Light Scattering (DLS). After a review of the theoretical problem of DLS under shear, a detailed description of the setup…

Soft Condensed Matter · Physics 2009-11-07 Jean-Baptiste Salmon , Sebastien Manneville , Annie Colin , Bernard Pouligny

Video frame interpolation~(VFI) algorithms have improved considerably in recent years due to unprecedented progress in both data-driven algorithms and their implementations. Recent research has introduced advanced motion estimation or novel…

Computer Vision and Pattern Recognition · Computer Science 2022-07-26 Zhixiang Chi , Rasoul Mohammadi Nasiri , Zheng Liu , Yuanhao Yu , Juwei Lu , Jin Tang , Konstantinos N Plataniotis

Despite almost all being acquired as photons, astronomical data from different instruments and at different stages in its life may exist in different formats to serve different purposes. Beyond the data itself, descriptive information is…

Instrumentation and Methods for Astrophysics · Physics 2015-07-15 Jessica D. Mink