Results 31 to 40 of about 1,352 (191)

Analyses of competent and non‐competent subpopulations of Bacillus subtilis reveal yhfW, yhxC and ncRNAs as novel players in competence

Environmental Microbiology, Volume 22, Issue 6, Page 2312-2328, June 2020., 2020
Summary Upon competence‐inducing nutrient‐limited conditions, only part of the Bacillus subtilis population becomes competent. Here, we separated the two subpopulations by fluorescence‐assisted cell sorting (FACS). Using RNA‐seq, we confirmed the previously described ComK regulon.
Mirjam Boonstra, Marc Schaffer, Joana Sousa, Luiza Morawska, Siger Holsappel, Petra Hildebrandt, Praveen Kumar Sappa, Hermann Rath, Anne de Jong, Michael Lalk, Ulrike Mäder, Uwe Völker, Oscar P. Kuipers   +12 more
wiley   +1 more source

PCOI: Packet Classification‐Based Optical Interconnect for Data Centre Networks

Mathematical Problems in Engineering, Volume 2020, Issue 1, 2020., 2020
To support cloud services, Data Centre Networks (DCNs) are constructed to have many servers and network devices, thus increasing the routing complexity and energy consumption of the DCN. The introduction of optical technology in DCNs gives several benefits related to routing control and energy efficiency.
Rab Nawaz Jadoon, Mohsin Fayyaz, WuYang Zhou, Muhammad Amir Khan, Ghulam Mujtaba, Van Huy Pham   +5 more
wiley   +1 more source

RSOA Intensity Modulator Frequency Chirp-Enhanced Optical OFDM PON Performance

IEEE Photonics Journal, 2015
A reflective semiconductor optical amplifier intensity modulator (RSOA-IM) frequency chirp considerably increases the system frequency response of an intensity-modulation and direct-detection (IMDD) PON system over the passband signal spectral region ...
B. Y. Cao, M. L. Deng, Q. W. Zhang, R. P. Giddings, M. Wang, J. M. Tang   +5 more
doaj   +1 more source

A Reconfigurable High-Order UWB Signal Generation Scheme Using RSOA-MZI Structure

IEEE Photonics Journal, 2014
We propose and experimentally demonstrate a reflective semiconductor optical amplifier (RSOA)-based Mach-Zehnder interferometer structure for generating high-order ultrawideband (UWB) signals. First, low-order UWB signals are generated by controlling the
Hanlin Feng, Mable P. Fok, Shilin Xiao, Jia Ge, Qi Zhou, Mary Locke, Ryan Toole, Weisheng Hu   +7 more
doaj   +1 more source

Multicore-Fiber-Enabled WSDM Optical Access Network With Centralized Carrier Delivery and RSOA-Based Adaptive Modulation

IEEE Photonics Journal, 2015
We proposed and experimentally demonstrated a wavelength-space division multiplexing (WSDM) optical access network architecture with centralized optical carrier delivery utilizing multicore fibers (MCFs) and adaptive modulation based on reflective ...
Zhenhua Feng, Borui Li, Ming Tang, Lin Gan, Ruoxu Wang, Rui Lin, Zhilin Xu, Songnian Fu, Lei Deng, Weijun Tong, Shengya Long, Lei Zhang, Hongyan Zhou, Rui Zhang, Shuang Liu, Perry Ping Shum   +15 more
doaj   +1 more source

25-GHz-Spaced DWDM-PON With Mitigated Rayleigh Backscattering and Back-Reflection Effects

IEEE Photonics Journal, 2013
A novel 25-GHz-spaced dense wavelength-division multiplexing passive optical network (DWDM-PON) is proposed to improve the utilization of wavelength resource and mitigate the Rayleigh backscattering (RB) and back-reflection effects.
Zhao Zhou, Shilin Xiao, Tao Qi, Pingqing Li, Meihua Bi, Weisheng Hu   +5 more
doaj   +1 more source

A BIDIRECTIONAL DIRECTLY MODULATED CABLE PON BASED ON A RSOA [PDF]

Progress In Electromagnetics Research C, 2010
A bidirectional directly modulated cable passive optical network (PON) based on a re∞ective semiconductor optical amplifler (RSOA) as a colorless modulator in the optical network unit (ONU) is proposed and demonstrated. Good performances of downstream carrier-to-noise ratio (CNR)/composite second-order (CSO)/composite triple beat (CTB) and upstream bit
Hsiao-Chun Peng, Hai-Han Lu, Wen-Shing Tsai, Chen-Ling Ying, Hwan-Wen Chen   +4 more
openaire   +1 more source

EFFICIENT SPECTRUM SENSING IN COGNITIVE RADIO NETWORK-A HYBRID ERNN-RSOA APPROACH

International Journal of Drug Delivery Technology
A fixed spectrum allocation policy has been adopted in recent years that allocates wireless spectrum to administrative agencies for licensing for a long period of time in high geographical areas.
Manshi Shah, Hardik J. Prajapati, M. Gandhi, Hiren Shukla, Vishal P. Jariwala   +4 more
semanticscholar   +1 more source

Optical Channel Capacity Upgrade Based on Multiwavelength Conversion XGM Using Semiconductor Optical Amplifier for Access Networks

International Journal of Optics, Volume 2017, Issue 1, 2017., 2017
This paper demonstrates a 10 Gb/s one‐to‐two‐wavelength conversion configuration based on cross‐gain modulation for optical access networks using a single TW‐SOA. The method is capable of converting a signal data of specific wavelength 1541 nm to certain wavelengths of CW’s laser 1554 nm and 1558 nm with 4 nm spacing.
Mohammad Syuhaimi Ab-rahman, Abdul Hameed Almabrok Swedan, Sulaiman Wadi Harun   +2 more
wiley   +1 more source

Amplified spontaneous emission pulses for high‐power supercontinuum generation

The Journal of Engineering, Volume 2016, Issue 3, Page 29-31, March 2016., 2016
The authors demonstrate an incoherent light source based on a reflective semiconductor optical amplifier as pump for high‐power supercontinuum generation for the first time. The obtained power level is about 160 mW and 20 dB spectral bandwidth is around 170 nm.
Huan Huan Liu, Kin Kee Chow
wiley   +1 more source