Results 51 to 60 of about 2,226,540 (235)

Characterization of the semiconductor optical amplifier for amplification and photonic switching employing the segmentation model [PDF]

, 2008
This paper characterizes the gain and the carrier density responses of a semiconductor optical amplifier (SOA). In order to achieve the switching functions in SOA-based optical switches, such as Symmetric Mach-Zehnder (SMZ), the effect of the input ...
Ghassemlooy, Zabih, Ng, Wai Pang, R. Ngah, Z. Ghassemlooy, Moustafa H. Aly, Aly, Moustafa, M. F. Chiang, Chiang, Ming-Feng, Ngah, Razali, Abd El Aziz, W. P. Ng, Abd El Aziz, Ahmad   +11 more
core   +1 more source

Gain Characteristics of Hybrid Waveguide Amplifiers in SiN Photonics Integration with Er-Yb:Al₂O₃ Thin Film

Photonics
Integrated optical waveguide amplifiers, with their compact footprint, low power consumption, and scalability, are the basis for optical communications. The realization of high gain in such integrated devices is made more challenging by the tight optical
Ziming Dong, Guoqing Sun, Yuqing Zhao, Yaxin Wang, Lei Ding, Liqin Tang, Yigang Li   +6 more
doaj   +1 more source

Optical Design of Dilute Nitride Quantum Wells Vertical Cavity Semiconductor Optical Amplifiers for Communication Systems

ARO-The Scientific Journal of Koya University, 2016
III-V semiconductors components such as Gallium Arsenic (GaAs), Indium Antimony (InSb), Aluminum Arsenic (AlAs) and Indium Arsenic (InAs) have high carrier mobilities and direct energy gaps.
Faten A. Chaqmaqchee
doaj   +1 more source

A Review on the Flexure-Based Displacement Amplification Mechanisms

IEEE Access, 2020
Multifarious flexure-based displacement amplifiers have been proposed and studied in the past decades, showing importance in many industrial fields, such as bioengineering, optical instruments, and semiconductor technology.
Fangxin Chen, Qianjun Zhang, Yongzhuo Gao, Wei Dong   +3 more
doaj   +1 more source

Epigenetic silencing of the liver‐specific lncRNA LUNAR promotes liver cancer progression via NOTCH activation

Molecular Oncology, EarlyView.
LUNAR is a liver‐specific long noncoding RNA (lncRNA) that is highly expressed in normal liver but becomes epigenetically silenced in hepatocellular carcinoma through promoter hypermethylation. Loss of LUNAR is associated with NOTCH activation, epithelial–mesenchymal transition, and metastasis, whereas restoring LUNAR restrains metastatic progression ...
Se Ha Jang, Hyung Seok Kim, Geum Ok Baek, Moon Gyeong Yoon, Su In Lee, Jee‐Yeong Jeong, Ji Eun Han, Soon Sun Kim, Jae Youn Cheong, Jung Woo Eun   +9 more
wiley   +1 more source

Zero-PDG silicon photonic amplifier with high saturation power and low noise figure

Nature Communications
High-power amplifiers are of great importance in many optical systems deployed in optical sensing, ranging, medical surgery and more. Likewise, high-gain, low-noise amplifiers with low polarization dependence are critical components of long-range optical
Jan Lorenzen, Kai Wang, Muharrem Kilinc, Mikhail Pergament, Sonia M. Garcia-Blanco, Franz X. Kärtner, Neetesh Singh   +6 more
doaj   +1 more source

CEACAM1 participation in breast cancer progression

Molecular Oncology, EarlyView.
In invasive breast cancer (BC), CEACAM1 shifts from an apical to a uniform membranous/cytoplasmic pattern, or is lost, as tumors dedifferentiate, inversely tracking the Ki‐67 proliferative index. In MCF‐7 cells, only CEACAM1‐4L suppresses proliferation, repressing cell cycle and growth factor genes.
Mykola Lyndin, Irina Kube‐Golovin, Anatolii Romaniuk, Gunther Wennemuth   +3 more
wiley   +1 more source

Simple DQPSK Signal Regenerator Using Electrical Limiting Amplifiers

IEEE Photonics Journal, 2015
A simple optoelectronic regenerator for differential quadrature phase-shift keying (QPSK) signals is demonstrated. The regenerator consists of two parallel delay interferometers followed by balanced detectors, limiting and driving amplifiers, and a dual ...
Masayuki Matsumoto
doaj   +1 more source

Pharmacological chromatin remodeling enhances response to estrogen therapy in ER+ breast cancer

Molecular Oncology, EarlyView.
Estrogen therapy elicits clinical benefit in ~ 30% of patients with endocrine‐resistant estrogen receptor (ER)‐positive breast cancer. Based on findings that ER transcriptional activation underlies response to estrogen therapy, we tested the effects of epigenetic dysregulation via pharmacological inhibition of histone deacetylases (HDACi).
Anneka L. Johnson Thomas, Barbara Karakyriakou, Patricia C. Muskus, Alyssa M. Roberts, Justin Rendleman, Alexa Warren, Hanxu Lu, Kimberly A. Birmingham, Malone K. Friedman, Abigail E. Goen, Huijuan Yang, Owen M. Wilkins, Fred W. Kolling, Eugene Demidenko, Julie M. Jorns, Brock C. Christensen, Todd W. Miller   +16 more
wiley   +1 more source

Optimization of Very Short Multi-Pump Discrete Raman Amplifiers based on Tellurite Fibers

Journal of Microwaves, Optoelectronics and Electromagnetic Applications
This paper presents a numerical study and the optimization of very short discrete multi-pump Raman amplifiers using Tellurite-based optical fibers. While most studies about discrete Raman amplifiers usually focus on cases where hundreds of meters of ...
Gabriel C. Bastida, Helder R. de O. Rocha, Marcelo E. V. Segatto, Carlos E. S. Castellani   +3 more
doaj   +1 more source