Results 61 to 70 of about 3,670,840 (396)

Nonlinearity and Noise Effects in Multi-level Signal Millimeter-Wave over Fiber Transmission using Single- and Dual-Wavelength Modulation [PDF]

, 2010
We transmit multilevel quadrature amplitude modulation (QAM) data-IEEE 802.16 schemes-at 20 MSps and an orthogonal frequency-division multiplexing (OFDM) 802.11 g signal (54 Mbps) with a 25 GHz millimeter-wave over fiber system, which employs a dual ...
Jeanne James, James, Jeanne, Anthony Nkansah, Shen, Pengbo, Xing Liang, Pengbo Shen, Nkansah, Anthony, Gomes, Nathan J., Liang, Xing, Nathan J. Gomes   +9 more
core   +1 more source

Coupled-Cavity VCSEL with an Integrated Electro-Absorption Modulator: Small- and Large-Signal Modulation Analysis

Applied Sciences, 2020
We consider an integrated electro-absorption modulator within a coupled-cavity VCSEL structure (EAM-VCSEL). We derive expressions for the modulation transfer function (MTF) of the EAM-VCSEL for small-signal modulation of either VCSEL injection current or
Krassimir Panajotov, Richard Schatz
doaj   +1 more source

MIMO free-space optical communication employing subcarrier intensity modulation in atmospheric turbulence channels

, 2009
In this paper, we analyse the error performance of transmitter/receiver array free-space optical (FSO) communication system employing binary phase shift keying (BPSK) subcarrier intensity modulation (SIM) in clear but turbulent atmospheric channel ...
Ghassemlooy, Zabih, Popoola, Wasiu Oyewole, Wasiu O. Popoola, Ahmadi, Vahid, Erich Leitgeb, Leitgeb, Erich, Vahid Ahmadi, Zabih Ghassemlooy   +7 more
core   +1 more source

Temporal modulation transfer functions in the European Starling (Sturnus vulgaris): II. Responses of auditory-nerve fibres [PDF]

, 1995
The temporal resolution of cochlear-nerve fibres in the European starling was determined with sinusoidally amplitude-modulated noise stimuli similar to those previously used in a psychoacoustic study in this species (Klump and Okanoya, 1991).
Klump, Georg M., Gleich, Otto, O. Gleich, G.M. Klump   +3 more
core   +1 more source

All-Optical Modulation Characteristics of a Microfiber Coupler Combined Sagnac Loop

IEEE Photonics Journal, 2019
In this paper, we theoretically and experimentally investigate the all-optical modulation characteristics of a microfiber coupler combined Sagnac loop (MCSL).
Yang Yu, Qiang Bian, Jianfei Wang, Xueliang Zhang, Junbo Yang, Linmei Liang   +5 more
doaj   +1 more source

A Simplified Volterra Equalizer Based on System Characteristics for Direct Modulation Laser (DML)-Based Intensity Modulation and Direct Detection (IM/DD) Transmission Systems

Photonics, 2023
The nonlinear Volterra equalizer has been proved to be able to solve the problem of nonlinear distortion, but it has high computational complexity and is difficult to implement.
Zhongshuai Feng, Na Li, Wei Li, Peili He, Ming Luo, Qianggao Hu, Liyan Huang, Yi Jiang   +7 more
doaj   +1 more source

Optical filter requirements in an EML-based single-sideband PAM4 intensity-modulation and direct-detection transmission system.

Optics Express, 2017
The feasibility of a single sideband (SSB) PAM4 intensity-modulation and direct-detection (IM/DD) transmission based on a CMOS ADC and DAC is experimentally demonstrated in this work.
Hsing-Yu Chen, N. Kaneda, Jeffrey Lee, Jyehong Chen, Young-Kai Chen   +4 more
semanticscholar   +1 more source

Intensity modulated radiation therapy versus volumetric intensity modulated arc therapy [PDF]

Journal of Medical Radiation Sciences, 2013
The advanced developments in external beam radiation therapy (EBRT) over the past few decades have improved dose conformity to the target while minimizing dose to the surrounding organs at risk (OAR). Intensity modulated radiation therapy (IMRT) and volumetric modulated arc therapy (VMAT) are two commonly used EBRT techniques to treat cancer.
openaire   +2 more sources

Analysis and Experimental Study of a Silicon Photonic Single MRM-Assisted MZI PAM-4 Modulator

IEEE Photonics Journal, 2017
We report on the analysis and experimental study of a silicon photonic single microring modulator (MRM) assisted Mach–Zehnder interferometer for high-speed four-level pulse amplitude modulation (PAM-4).
Rui Li, David Patel, Alireza Samani, Eslam El-Fiky, Yun Wang, Zhenping Xing, Luhua Xu, David V. Plant   +7 more
doaj   +1 more source

Intensity dependent residual amplitude modulation in electro-optic phase modulators

, 2012
Residual amplitude modulation (RAM) mechanisms in electro-optic phase modulators are detrimental in applications that require high purity phase modulation of the incident laser beam.
Jaatinen, Esa, Sathian, Juna
core   +1 more source