Results 51 to 60 of about 204 (73)

An Ultracompact OSNR Monitor Based on an Integrated Silicon Microdisk Resonator

open access: yesIEEE Photonics Journal, 2012
Optical signal-to-noise ratio (OSNR) monitoring is essential for control and management of dynamic optical networks. Small footprint, low cost, and less power consumption are always desirable for such monitoring system.
Ke Xu   +6 more
doaj   +1 more source

OSNR Monitoring Using Support Vector Ordinal Regression for Digital Coherent Receivers

open access: yesIEEE Photonics Journal, 2019
An OSNR monitoring method assisted by support vector ordinal regression (SVOR) is proposed for digital coherent receivers. According to Godard's error of equalized signals obtained after polarization demultiplexing, the optical signal-to-noise ratio ...
Ming Hao   +6 more
doaj   +1 more source

A Novel Algorithm for Routing Paths Selection in Mesh-Based Optical Networks-on-Chips

open access: yesMicromachines, 2020
Optical networks-on-chips (ONoCs) is an effective and extensible on-chip communication technology, which has the characteristics of high bandwidth, low consumption, and low delay.
Xiao-Ping Yang   +8 more
doaj   +1 more source

Noise Suppression in Quadrature Phase-Shift-Keying-Oriented All-Optical Matching Systems Using Highly Nonlinear Fiber

open access: yesPhotonics
All-optical matching systems that detect and localize designated target sequences in input all-optical data sequences have attracted significant attention in all-optical processing.
Xin Li   +4 more
doaj   +1 more source

A Selectable Single-Mode Erbium Fiber Laser With Mach-Zehnder Interferometer and Rayleigh Injection Scheme

open access: yesIEEE Photonics Journal, 2022
In the paper, a hybrid Mach-Zehnder interferometer (MZI) and Rayleigh backscattering (RB) injection is designed and applied in the erbium-doped fiber (EDF) ring laser configuration.
Chien-Hung Yeh   +4 more
doaj   +1 more source

Joint and Accurate OSNR Estimation and Modulation Format Identification Scheme Using the Feature-Based ANN

open access: yesIEEE Photonics Journal, 2019
A joint and accurate optical signal-to-noise ratio (OSNR) estimation and modulation formats identification (MFI) scheme based on the artificial neural network (ANN) is proposed and demonstrated via both simulation and the experiment system.
Qian Xiang   +3 more
doaj   +1 more source

Blind Frequency Offset Estimation Based on Phase Rotation For Coherent Transceiver

open access: yesIEEE Photonics Journal, 2020
Conventional fast Fourier transform based frequency offset estimation (FFTFOE) algorithm is suitable for QPSK and 8/16/64QAM signals. However, due to the nonrectangular distribution of constellation points, the conventional FFT-FOE is not suitable for 32-
Qingzhao Tan   +3 more
doaj   +1 more source

QPSK Training Sequence-Based Both OSNR and Chromatic Dispersion Monitoring in DWDM Systems

open access: yesIEEE Photonics Journal, 2018
We design a quadrature phase-shift keying training sequence (QPSK-TS) for monitoring both optical signal-to-noise ratio (OSNR) and chromatic dispersion (CD) in a dense wavelength division multiplexing (DWDM) system.
Feilong Wu   +5 more
doaj   +1 more source

True Equalization of Polarization-Dependent Loss in Presence of Fast Rotation of SOP

open access: yesApplied Sciences, 2020
In an optical fiber communication system, polarization-dependent loss (PDL), referring to polarization-dependent optical power attenuation, might be a main system performance limiting factor.
Nan Cui   +4 more
doaj   +1 more source

All-optical reconfigurable non-inverted logic gates with a single semiconductor optical amplifier

open access: yesAIP Advances, 2019
All-optical reconfigurable non-inverted logic gates with a single semiconductor optical amplifier (SOA) is proposed. Compared with the probe light of continuous light, the clock (Clk) pulse sequences light is regarded as the probe light so that the ...
Bingchen Han, Yi Liu
doaj   +1 more source

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