Results 61 to 70 of about 57,281 (193)

Effect of Laser Polarization on Fiber Bragg Grating Fabry-Perot Interferometer for Ultrasound Detection

open access: yesIEEE Photonics Journal, 2020
High-finesse fiber Bragg gratings (FBGs) Fabry-Perot interferometers (FPIs) have shown great promise as sensitive ultrasonic sensors. However, the fabrication process of the sensors usually introduces birefringence to the fiber, which makes the sensor ...
Yupeng Zhu, Qiwen Sheng, Ming Han
doaj   +1 more source

Orientation of optically trapped nonspherical birefringent particles [PDF]

open access: yes, 2006
While the alignment and rotation of microparticles in optical traps have received increased attention recently, one of the earliest examples has been almost totally neglected the alignment of particles relative to the beam axis, as opposed to about the ...
Gibson, Ursula J.   +4 more
core   +3 more sources

Detection of Vacuum Birefringence with Intense Laser Pulses

open access: yes, 2004
We propose a novel technique that promises hope of being the first to directly detect a polarization in the quantum electrodynamic (QED) vacuum. The technique is based upon the use of ultra-short pulses of light circulating in low dispersion optical ...
Aleksandrov   +30 more
core   +1 more source

Electron-Irradiation Induced Nanocrystallization of Pb(II) in Silica Gels Prepared in High Magnetic Field

open access: yes, 2015
In a previous study, structure of silica gels prepared in a high magnetic field was investigated. While a direct application of such anisotropic silica gels is for an optical anisotropic medium possessing chemical resistance, we show here their ...
Kaito, Chihiro   +2 more
core   +1 more source

Monitoring the Etching Process of Hi-Bi Fiber Through a Fiber Loop Mirror

open access: yesIEEE Photonics Journal, 2017
A method for monitoring the etching process of Hi-Bi fiber is proposed and demonstrated. The birefringence of the etching fiber is accurately calculated by tracking the shift of the interference spectrum in a high-birefringence fiber loop mirror ...
Danling Wu, Jun Zhu, Hui Wang, Benli Yu
doaj   +1 more source

High Frequency Modulation Method for Measuring of Birefringence

open access: yesEPJ Web of Conferences, 2013
A method of optical birefringence measurement is presented. It uses an el ectro-optic modulator for the high frequency modulation of polarization of the laser beam. The developed optical apparatus exhibits high sensitivity.
Šulc M., Kunc Š.
doaj   +1 more source

Hybrid structure hollow-core anti-resonant fiber with low confinement loss at 1550 nm and high birefringence in the C-band

open access: yesResults in Physics
This study proposes a hollow-core anti-resonant fiber with a hybrid nested cladding structure, aimed at achieving high birefringence, broad bandwidth, and low confinement loss. The proposed fiber has a three-layer nested ring structure in the x-direction
Yuan Yang   +7 more
doaj   +1 more source

Highly birefringent, low-loss liquid crystals for terahertz applications

open access: yesAPL Materials, 2013
With growing interest in switchable devices for the THz frequency range, there is a strong demand for liquid crystals (LC) exhibiting both a high birefringence and a low absorption. We present the refractive index and absorption coefficient of the liquid
M. Reuter   +6 more
doaj   +1 more source

Magnetic Faraday rotation in lossy photonic structures

open access: yes, 2009
Magnetic Faraday rotation is widely used in optics and MW. In uniform magneto-optical materials, this effect is very weak. One way to enhance it is to incorporate the magnetic material into a high-Q optical resonator.
Figotin, A., Vitebskiy, I.
core   +1 more source

Detecting relic gravitational waves in the CMB: The contamination caused by the cosmological birefringence

open access: yes, 2014
The B-mode polarization of the cosmic microwave background (CMB) radiation is an excellent information channel for the detection of relic gravitational waves.
Li, Mingzhe, Zhao, Wen
core   +2 more sources

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