Results 51 to 60 of about 6,648 (171)

Broadband dual-comb hyperspectral imaging and adaptable spectroscopy with programmable frequency combs

APL Photonics
We explore the advantages of a free-form dual-comb spectroscopy (DCS) platform based on time-programmable frequency combs for real-time, penalty-free apodized scanning.
Fabrizio R. Giorgetta, Jean-Daniel Deschênes, Richard L. Lieber, Ian Coddington, Nathan R. Newbury, Esther Baumann   +5 more
doaj   +1 more source

Design and Demonstration of Apodized Comb Filters on SOI

IEEE Photonics Journal, 2012
We report on the design, modeling, and characterization of apodized comb filters in the silicon-on-insulator platform. These devices are based on sampled gratings, wherein the comb response is generated by a convolution of a regular grating by a ...
Venkat Veerasubramanian, Guillaume Beaudin, Alexandre Giguere, Boris Le Drogoff, Vincent Aimez, Andrew G. Kirk   +5 more
doaj   +1 more source

Designing of Fiber Bragg Gratings for Long-Distance Optical Fiber Sensing Networks

Modelling and Simulation in Engineering, 2022
Most optical sensors on the market are optical fiber Bragg grating (FBG) sensors with low reflectivity (typically 7-40%) and low side-lobe suppression (SLS) ratio (typically SLS
Janis Braunfelds, Elvis Haritonovs, Ugis Senkans, Inna Kurbatska, Ints Murans, Jurgis Porins, Sandis Spolitis   +6 more
doaj   +1 more source

Revisiting Securidaca longipedunculata Seed Oil: Applying NMR and Mass Spectroscopy to Confirm the Presence of 2‐Acetyl‐1,3‐Diacyl–sn‐Glycerols and Conjugated Hydroxydienoic Fatty Acids

Journal of the American Oil Chemists' Society, EarlyView.
The manuscript confirms and expands on previous reports concerning the presence of unusual conjugated hydroxydienoic fatty acids and acetyl‐TAG in the seed oil of Securidaca longipedunculata. The location of acetate only at sn‐2 of TAG was conclusively shown by high resolution NMR and hydroxy seed fatty acids are characterized.
Mark A. Smith, Jianfeng Zhu, Jin‐Yue Sun   +2 more
wiley   +1 more source

Asymmetric apodization for the comma aberrated point spread function

, 2017
This paper deals with the study of light flux distributions in the point spread function formed by an optical system with a one-dimensional aperture under the influence of the coma aberration.
null null, S. Khonina, A. Reddy, D. Sagar   +3 more
core   +1 more source

Sensitivity analysis of designed apodized fiber Bragg grating sensor using artificial neural network and tree-based models

Results in Optics, 2023
An apodized FBG is designed to eliminate the side lobes from the reflectivity spectrum for the sensitivity measurement of physical parameters including temperature, strain, and pressure.
Himadri Nirjhar Mandal, Soumya Sidhishwari   +1 more
doaj   +1 more source

High‐Efficiency Graphene‐Silicon Slot‐Waveguide Microring Modulator at 1.5 and 2 µm Wavelength Bands

Laser &Photonics Reviews, EarlyView.
E/O modulators typically face a trade‐off between bandwidth and modulation efficiency. An integrated E/O modulator is presented that simultaneously achieves wideband, large bandwidth, and high modulation efficiency operation by embedding a partially overlapped double‐layer graphene on a compact silicon slot‐waveguide microring resonator.
Chao Luan, Deming Kong, Yong Liu, Yunhong Ding, Hao Hu   +4 more
wiley   +1 more source

Optical Bottle Shaping Using Axicons with Amplitude or Phase Apodization

Photonics, 2023
We investigate the formation of single and multiple optical bottle beams on the optical axis using a diffractive axicon with amplitude or phase apodization.
Svetlana N. Khonina, Andrey V. Ustinov, Sergey I. Kharitonov, Sergey A. Fomchenkov, Alexey P. Porfirev   +4 more
doaj   +1 more source

High‐Speed Integrated Graphene‐Silicon Slot‐Waveguide Electro‐Absorption Modulator at 2 and 1.5 µm Wavebands

Laser &Photonics Reviews, EarlyView.
A high‐speed, efficient, robust, and compact 2‐μm$\mathrm{\mu}\mathrm{m}$ waveband E/O absorption modulator based on a graphene‐silicon slot waveguide is demonstrated. This work represents a significant advancement towards the realization of high‐speed integrated E/O modulators for optical communication systems operating at the 2‐μm$\mathrm{\mu}\mathrm{
Chao Luan, Deming Kong, Yunhong Ding, Hao Hu   +3 more
wiley   +1 more source

Point-by-point inscription of chirped apodized fiber Bragg gratings for application as ultrashort pulse stretchers

Results in Physics, 2022
There are special requirements for chirped fiber Bragg gratings used as stretchers in ultrafast fiber lasers. The benefits of fabricating fiber stretchers by the femtosecond point-by-point single-shot technique are described.
Ivan Ulyanov, Dmitrii V. Przhiialkovskii, Oleg V. Butov   +2 more
doaj   +1 more source