Results 41 to 50 of about 311,604 (320)

Direct recognition of Raman spectra without baseline correction based on deep learning

open access: yesAIP Advances, 2022
Raman spectroscopy, widely used for material analysis, has formed an extensive spectral library. In practical applications, it is usually necessary to preprocess Raman spectroscopy of the target material and then identify the material through spectral ...
Yuping Liu   +3 more
doaj   +1 more source

Operation of Fabry-Perot laser with nonlinear PT-symmetric mirror [PDF]

open access: yesBulletin of the Polish Academy of Sciences: Technical Sciences, 2021
The above-threshold operation of a Fabry-Perot laser with a nonlinear PT (parity time) mirror is investigated. For the first time, the analysis accounts for gain saturation of an active medium as well as gain and loss saturation effects in the PT mirror.
Agnieszka Mossakowska-Wyszyńska   +2 more
doaj   +1 more source

Periodic structures in integrated optics [PDF]

open access: yes, 1973
Thin‐film dielectric waveguides with a periodic refractive index, a periodic substrate, or periodic surface are studied. The field is determined from Maxwell's equations using Floquet's theorem.
Elachi, C., Yeh, C.
core   +1 more source

High-Order Interference Effect Introduced by Polarization Mode Coupling in Polarization—Maintaining Fiber and Its Identification

open access: yesSensors, 2016
The high-order interference (HOI)—The interferogram introduced by polarization mode couplings (PMC) of multiple perturbations—Will cause misjudgment of the realistic coupling points in polarization-maintaining fiber (PMF) which is tested with a white ...
Chuang Li   +7 more
doaj   +1 more source

Modal Interferometer Using Three-Core Fiber for Simultaneous Measurement Strain and Temperature

open access: yesIEEE Photonics Journal, 2016
A structure made of tapered three-core fiber and CO2 laser notch long-period fiber grating is proposed in this paper. By adjusting the taper waist diameter of a three-core fiber, this structure is made suitable for simultaneous strain and temperature ...
Tao Geng   +7 more
doaj   +1 more source

Multidimensional quantum entanglement with large-scale integrated optics [PDF]

open access: yes, 2018
The ability to control multidimensional quantum systems is key for the investigation of fundamental science and for the development of advanced quantum technologies.
Acín, Antonio   +18 more
core   +4 more sources

Up-Conversion Luminescence and C-Band Laser in Er3+-Doped Fluorozirconate Glass Microsphere Resonator

open access: yesIEEE Photonics Journal, 2019
Up-conversion luminescence and C-band microsphere laser output is reported for an Er3+-doped ZrF4-BaF2-YF3-AlF3 (ZBYA) fluorozirconate glass microsphere. The microsphere was fabricated by heating a ZBYA glass filament using a CO2 laser beam.
Haiyan Zhao   +9 more
doaj   +1 more source

Reduced-Threshold Emission of Capillary Filled by Doped-Dye Cholesteric Liquid Crystals With Photo-Alignment Polyimide Films

open access: yesIEEE Photonics Journal, 2018
A microcavity laser is reported using dye-doped cholesteric liquid crystals (CLCs) filled in a glass capillary with photo-alignment polyimide films. This laser runs based on the properties that a CLC has a refractive index much higher than that of glass,
Yue-Lan Lu   +5 more
doaj   +1 more source

Silicon oxynitride in integrated optics [PDF]

open access: yes, 1998
A review on the state of the art of silicon oxynitride deposition at the MESA Research Institute will be given.
Driessen, Alfred   +3 more
core   +2 more sources

Design and characterization of SiON integrated optics components for optical coherence tomography [PDF]

open access: yes, 2009
Optical coherence tomography (OCT) is a technique for high resolution imaging of biological tissues with a depth range of a few millimeters. OCT is based on interferometry to enable depth ranging.
Driessen, A.   +7 more
core   +2 more sources

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