Results 1 to 10 of about 2,231,619 (353)

The Adoption of Chalcogenide Glass Fiber as Pulse Stretcher in an All-Fiber Structured 2 μm Chirped Pulse Amplification System

open access: yesIEEE Photonics Journal, 2021
We present the development of an As2S3 fiber-based reusable inline optical connector; and, for the first time to the best of our knowledge, integrated it into a 2 μm chirped pulse amplification system as the pulse stretcher.
Weiwang Zhang   +16 more
doaj   +1 more source

On-Orbit Geometric Calibration from the Relative Motion of Stars for Geostationary Cameras

open access: yesSensors, 2021
Affected by the vibrations and thermal shocks during launch and the orbit penetration process, the geometric positioning model of the remote sensing cameras measured on the ground will generate a displacement, affecting the geometric accuracy of imagery ...
Linyi Jiang   +6 more
doaj   +1 more source

Calibration of a Dust Scattering Instrument Using Tomographic Techniques and Its Application to a Dust Sensor Instrument

open access: yesSensors, 2023
The characterization of suspended dust near the Martian surface is extremely relevant to understand the climate of Mars. In this frame, a Dust Sensor instrument, an infrared device designed to obtain the effective parameters of Martian dust using the ...
David Santalices   +6 more
doaj   +1 more source

Recent Progress on Electrical and Optical Manipulations of Perovskite Photodetectors

open access: yesAdvanced Science, 2021
Photodetectors built from conventional bulk materials such as silicon, III–V or II–VI compound semiconductors are one of the most ubiquitous types of technology in use today.
Fang Wang   +18 more
doaj   +1 more source

High-performance HgCdTe avalanche photodetector enabled with suppression of band-to-band tunneling effect in mid-wavelength infrared

open access: yesnpj Quantum Materials, 2021
HgCdTe avalanche photodiodes promise various fascinating applications due to the outstanding capability of detecting weak signals or even single photon. However, the underlying transport mechanisms of diverse dark current components are still unresolved ...
Jin Chen   +12 more
doaj   +1 more source

Pristine PN junction toward atomic layer devices

open access: yesLight: Science & Applications, 2022
In semiconductor manufacturing, PN junction is formed by introducing dopants to activate neighboring electron and hole conductance. To avoid structural distortion and failure, it generally requires the foreign dopants localize in the designated micro ...
Hui Xia   +13 more
doaj   +1 more source

Attention Mechanism Cloud Detection With Modified FCN for Infrared Remote Sensing Images

open access: yesIEEE Access, 2021
Semantic segmentation (SS) has been widely applied for cloud detection (CD) in remote sensing images (RSIs) with high spatial and spectral resolution because of its effective pixel-level feature extraction structure.
Liyuan Li   +5 more
doaj   +1 more source

Bandgap-independent photoconductive detection in two-dimensional Sb2Te3

open access: yesCommunications Materials, 2022
Achieving photodetectors with a wide spectral range and rapid response remains challenging. Here, Sb2Te3 nanosheets are used to construct a photodetector that covers visible to millimeter wavelengths, with a fast response time of 900 ns.
Wanli Ma   +7 more
doaj   +1 more source

Local Spatial–Temporal Matching Method for Space-Based Infrared Aerial Target Detection

open access: yesSensors, 2022
The feature of a space-based infrared signal is that the intensity of clutter is much stronger than that of an aerial target. Such a feature poses a great challenge to aerial target detection since the existing infrared target detection methods are prone
Lue Chen   +3 more
doaj   +1 more source

Denoising and Feature Extraction for Space Infrared Dim Target Recognition Utilizing Optimal VMD and Dual-Band Thermometry

open access: yesMachines, 2022
Space target feature extraction and space infrared target recognition are important components of space situational awareness (SSA). However, owing to far imaging distance between the space target and infrared detector, the infrared signal of the target ...
Hao Zhang   +4 more
doaj   +1 more source

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