Results 31 to 40 of about 46,791 (149)

Deterministic Fiber‐Optic Spectral Engineering Enables Three‐Color Multiplexed Two‐Photon Microscopy

Laser &Photonics Reviews, EarlyView.
A simulation‐guided spectral‐engineering framework maps the nonlinear parameter space of a fiber laser platform to identify balanced three‐band excitation states. The resulting 960, 1080, and 1175 nm femtosecond pulses deliver nJ‐level energies for low‐cross‐talk chromatically multiplexed two‐photon microscopy.
Marvin Edelmann, Andreu Matamoros‐Angles, Mohsin Shafiq, Mikhail Pergament, Franz X. Kärtner, Markus Glatzel   +5 more
wiley   +1 more source

Constellation Estimation, Coherent Signal Processing, and Multiperspective Imaging in an Uncoupled Bistatic Cooperative Radar Network

IEEE Journal of Microwaves
Cooperative radar networks are a promising technology in various areas, such as vehicle-to-infrastructure networks for automotive radar and radar remote sensing with UAVs. The use of widely distributed radar networks enables the detection of targets with
Patrick Fenske, Tobias Koegel, Roghayeh Ghasemi, Martin Vossiek   +3 more
doaj   +1 more source

Frontiers of Bright CEP‐Stable Broadband Infrared Sources

Laser &Photonics Reviews, EarlyView.
Bright CEP‐stable broadband infrared sources push the limits of ultrafast science by delivering exceptional brightness alongside few‐cycle durations and multi‐octave spectral coverage. This review highlights emerging architectures and nonlinear conversion strategies that scale power while preserving phase stability.
Ugaitz Elu, Jens Biegert
wiley   +1 more source

Modulation Parameter Estimation of LFM Interference for Direct Sequence Spread Spectrum Communication System in Alpha-Stable Noise

IEEE Systems Journal, 2020
The linear frequency modulation (LFM) interference is one of the typical broadband interferences in direct sequence spread spectrum (DSSS) communication system.
Mingqian Liu, Yuting Han, Yunfei Chen, Hao Song, Zhutian Yang, Feng-kui Gong   +5 more
semanticscholar   +1 more source

Study of Reduction of Nonlinear Chirp Distortion Directly Modulated Semiconductor Lasers by Using Pulse Shaping

Journal of Engineering and Sustainable Development, 2009
A modulation of the device current leads to laser-power modulation and is useful for transmitting information as a sequence of optical pulses .However , modulation of the current also affects the optical frequency which emphasize that carriers influence
Mohammed Adnan Mahde
doaj  

Comb‐Driven Coherent Optical Transmitter for Scalable DWDM Interconnects

Laser &Photonics Reviews, EarlyView.
A comb‐driven coherent optical transmitter on a Si/SiN platform enables scalable DWDM interconnects by integrating ultra‐compact microring‐assisted modulators and interleavers. High‐baud coherent signaling achieves 400 Gb/s per wavelength and >$>$1 Tb/s multi‐channel transmission, with projected >$>$10 Tb/s per fiber, offering a path toward energy ...
Alireza Geravand, Erwan Weckenmann, Jean‐Michel Vallée, Farshid Shateri, Zibo Zheng, Simon Levasseur, Bo Yang, Jiajian Chen, Ting Wang, Zihao Wang, Leslie A. Rusch, Wei Shi   +11 more
wiley   +1 more source

An autonomous network of acoustic detectors to map tiger risk by eavesdropping on prey alarm calls

Remote Sensing in Ecology and Conservation, EarlyView.
Tiger population recovery brings with it increased fatalities from human‐tiger conflict. We describe a network of autonomous intelligent passive acoustic sensors that monitor the forest for deer alarm calls as a proxy for tiger risk and provide a risk map to local communities in real‐time.
Arik Kershenbaum, Andrew Markham, Holly Root‐Gutteridge, Bethany Smith, Casey Anderson, Riley McClaughry, Ramjan Chaudhary, Amogh Vishwakarma, Stephen Cummins, Angela Dassow   +9 more
wiley   +1 more source

Over-the-Air Phase Noise Spectral Density Measurement for FMCW Radar Sensors

IEEE Journal of Microwaves
Phase noise significantly degrades the performance of frequency-modulated continuous wave (FMCW)- and chirp sequence (CS)-based radar sensors. Knowledge of the power spectral density (PSD) of these sensors is therefore essential for estimating their ...
Christoph Birkenhauer, Peter Tschapek, Martin Vossiek   +2 more
doaj   +1 more source

Cyclone Ditwah (2025): moderate‐intensity tropical cyclone brings record flooding and damage to Sri Lanka

Weather, EarlyView.
Cyclone Ditwah (2025) made landfall in Sri Lanka as a tropical cyclone with only moderate intensity winds (~65–75kmh−1). Yet, its prolonged heavy rainfall also led to landslides and widespread flooding across Sri Lanka and the southern Indian states, with the combined effects of hazards causing impacts totalling 4.1 billion USD. Ditwah is, therefore, a
Sai Kulkarni, John Hillier
wiley   +1 more source

Estimation method of carrier and time of arrival by chirp-like phase-coded sequence

2017 Dynamics of Systems, Mechanisms and Machines (Dynamics), 2017
The paper deals with the estimation method of a carrier and time of arrival by chirp-like phase-coded sequence. The developed estimation method of the carrier and time of arrival is suitable for primary synchronization upon signal detection in phase and ...
P. Puzyrev, S. Zavyalov
semanticscholar   +1 more source