The strain sensitivity of a two-mode birefringent side-hole fiber is measured in the spectral domain. In a simple experimental setup comprising a broadband source, a polarizer, a two-mode birefringent side-hole fiber under varied elongations, an analyzer and a compact spectrometer, the spectral interferograms are resolved. These are characterized by the equalization wavelength at which spectral...

Rats with small bowel resection fed a high-oxalate diet develop extensive deposition of calcium oxalate (CaOx) and calcium phosphate crystals in the kidney after 4 mo. To explore the earliest sites of renal crystal deposition, rats received either small bowel resection or transection and were then fed either standard chow or a high-oxalate diet; perfusion-fixed renal tissue from five rats in ea...

Scrum of hypercholesterolemic rabbits, when pulsated for 72 hours at pressures of 300 mm. Hg/0 mm. Hg with a pulse rate of 80 produced a birefringent deposit in excised pieces of rabbit aortae. Scrum from normal rabbits did not produce this deposit. The active component or components responsible for this deposit are in the |8-lipoprotein fraction of serum. The birefringent material is detectabl...

We study the rotational dynamics of solid chiral and birefringent microparticles induced by elliptically polarized laser light in optical tweezers. We find that both reflection of left circularly polarized light and residual linear retardance affect the particle dynamics. The degree of ellipticity of laser light needed to induce rotations is found. The experimental results are compared with ana...

The polarization characteristics of birefringent tissues could be only partially obtained using linearly polarized light in polarization sensitive optical imaging. Here we analyze the change in polarization of backscattered light from birefringent structures versus the orientations of the incident polarizations using linearly, circularly and radially polarized light in a cross-polarized confoca...

Ultra-narrow optical spectral features resulting from highly dispersive light–matter interactions are essential for a broad range of applications such as spectroscopy, slow-light and high-precision sensing. Features approaching sub-megahertz or, equivalently, Q-factors up to one billion beyond, challenging obtain in solid-state systems, ultimately limited by loss. We present novel approach achi...

Birefringent Metasurfaces In article number 2301111 by Nathan J. Ray, Eyal Feigenbaum, and co-workers, reactive ion beam etching has been used to generate angled all-glass metasurface features that are monolithic the glass substrate. An anisotropic index of refraction for these metasurfaces enables non-birefringent materials exhibit birefringence. Additionally, imparted anisotropy lends itself ...

Optical coherence tomography (OCT) is now state of the art in ophthalmology. Other medical departments, such as otolaryngology, could also benefit from this imaging modality. Polarization is a property which is a benefit to conventional OCT. It can be used in particular to detect birefringent tissue layers. To evaluate possible OCT applications in Ear, Nose and Throat (ENT) department, a fiber-...