Results 71 to 80 of about 45,036 (321)

Coupled-mode analysis of fiber-optic add drop filters for dense wavelength-division multiplexing [PDF]

, 1997
We present a coupled-mode theory of fiber-optic add drop filters, which involve directional coupling between two fibers combined with fiber Bragg gratings defined inside the coupling region.
Orlov, Sergei S., Van Essen, Scott, Yariv, Amnon   +2 more
core   +1 more source

End‐to‐End Sensing Systems for Breast Cancer: From Wearables for Early Detection to Lab‐Based Diagnosis Chips

Advanced Materials Technologies, EarlyView.
This review explores advances in wearable and lab‐on‐chip technologies for breast cancer detection. Covering tactile, thermal, ultrasound, microwave, electrical impedance tomography, electrochemical, microelectromechanical, and optical systems, it highlights innovations in flexible electronics, nanomaterials, and machine learning.
Neshika Wijewardhane, Lyn I. Jones, Richard M. Martin, Helen Winter, Faezeh Arab Hassani   +4 more
wiley   +1 more source

Inhomogeneous Gain Saturation in EDF: Experiment and Modeling [PDF]

, 2011
Erbium-Doped Fiber Amplifiers can present holes in spectral gain in Wavelength Division Multiplexing operation. The origin of this inhomogeneous saturation behavior is still a subject of controversy.
Boivin, David, Burov, Ekatarina, Jacquier, B., Jurdyc, Anne-Marie, Peretti, Romain   +4 more
core   +3 more sources

Transducers Across Scales and Frequencies: A System‐Level Framework for Multiphysics Integration and Co‐Design

Advanced Materials Technologies, EarlyView.
Transducers convert physical signals into electrical and optical representations, yet each mechanism is bounded by intrinsic trade‐offs across bandwidth, sensitivity, speed, and energy. This review maps transduction mechanisms across physical scale and frequency, showing how heterogeneous integration and multiphysics co‐design transform isolated ...
Aolei Xu, Mengyao Xiao, Zhouli Sui, Yinpeng Wang, Daoye Zheng, Yuxin Liu, Luwei Wang, Huajun Liu, Chengkuo Lee   +8 more
wiley   +1 more source

High Dimensional Modulation and MIMO Techniques for Access Networks [PDF]

, 2012
Exploration of advanced modulation formats and multiplexing techniques for next generation optical access networks are of interest as promising solutions for delivering multiple services to end-users.
Daud, M. E., Ibrahim, A., Ibrahim, Z., Kamarudin, A. F., Md Noh, M. S., Mohd Anuar, M. A., Mokhatar, S. N.   +6 more
core   +3 more sources

Smart Closed‐Loop Systems in Personalized Healthcare: Advances and Outlook

Advanced Materials Technologies, EarlyView.
A smart closed‐loop e‐textile integrates multimodal sensing, onboard processing, wireless communication, and wearable power to enable real‐time physiological/biochemical monitoring and feedback‐controlled therapy. ABSTRACT Smart textiles represent a revolutionary frontier in healthcare, seamlessly blending fabric and advanced technologies to create ...
Safoora Khosravi, Sang Won Lee, Mohammad Abrar Uddin, Sina Hassanpoor, Neha Suvindran, Katherine Le, Harun Arkaz, Harishkumar Narayana, Saeid Soltanian, Danial Khorsandi, Negar Hosseinzadeh Kouchehbaghi, Taeil Kim, Yangzhi Zhu   +12 more
wiley   +1 more source

Multi-Component and Multi-Point Trace Gas Sensing in Wavelength Modulation Spectroscopy Based on Wavelength Stabilization

Photonic Sensors, 2019
Multi-component and multi-point trace gas sensing in the wavelength modulation spectroscopy is demonstrated based on the frequency-division multiplexing and time-division multiplexing technology.
Zongliang Wang, Jun Chang, Huishan Yu, Cunwei Tian, Hao Zhang, Xiukun Zhang, Longfei Tang, Qinduan Zhang, Yiwen Feng   +8 more
doaj   +1 more source

Quantum Metropolitan Optical Network based on Wavelength Division Multiplexing [PDF]

, 2013
Quantum Key Distribution (QKD) is maturing quickly. However, the current approaches to its application in optical networks make it an expensive technology.
Ciurana, Alex, Martin, Vicente, Martinez-Mateo, Jesus, Peev, Momtchil, Poppe, Andreas, Walenta, Nino, Zbinden, Hugo   +6 more
core   +6 more sources

Pixelated Laser with Tailored Emission Spectrum Photopatterned by Digital Holographic Microscopy

Advanced Optical Materials, EarlyView.
Azobenzene‐based surface‐relief gratings inscribed via DHM‐integrated holographic lithography enable programmable pixelated DFB laser architectures. This approach allows independent control of grating parameters across a 2D array, enabling spatially tailored emission spectra.
Sudharsana Bhashyam Pillailokam, Alex Berdin, Arri Priimagi   +2 more
wiley   +1 more source

Spatial and Wavelength Division Joint Multiplexing System Design for MIMO-OFDM Visible Light Communications

IEEE Access
The low-pass characteristics of front-end elements including light-emitting diodes (LEDs) and photodiodes (PDs) limit the transmission data rate of visible light communication (VLC) and Light Fidelity (LiFi) systems.
Cheng Chen, Shenjie Huang, Iman Tavakkolnia, Majid Safari, Harald Haas   +4 more
doaj   +1 more source