Results 71 to 80 of about 10,164 (270)

Advances in Mode (De)Multiplexing Technologies via Circularly Symmetric Structured Light Beams

Advanced Photonics Research, Volume 6, Issue 10, October 2025.
This review presents a comprehensive overview of mode (de)multiplexing technologies using circularly symmetric structured light beams, encompassing strategies of beam splitter combinations, multiorder diffractive gratings, optical coordinate transformations, angular dispersion lenses, multilayer cascaded modulations, and multidimensional hybrid (de ...
Qingji Zeng, Shu Chen, Zhibin Wu, Junmin Liu, Huapeng Ye, Gaiqing Zhao, Dianyuan Fan, Shuqing Chen   +7 more
wiley   +1 more source

In-Band Estimation of Optical Signal-to-Noise Ratio From Equalized Signals in Digital Coherent Receivers

IEEE Photonics Journal, 2014
We propose a novel method of in-band estimation of optical signal-to-noise ratio (OSNR) using a digital coherent receiver, where OSNR is determined from second- and fourth-order statistical moments of equalized signals in any modulation format.
Md. Saifuddin Faruk, Yojiro Mori, Kazuro Kikuchi   +2 more
doaj   +1 more source

Enhancing the monitoring sensitivity of DOP-based OSNR monitors in high OSNR region using off-center narrow-band optical filtering

Optics Express, 2007
Recently, OSNR monitoring based on the measurement of degree of polarization (DOP) has attracted much attention, thanks to its simplicity and high efficiency. However, the OSNR monitoring sensitivity is quite poor in the high OSNR region, resulting in high estimation error and narrow dynamic range.
Guo-Wei, Lu, Lian-Kuan, Chen
openaire   +2 more sources

Monitoring of OSNR Using an Improved Binary Particle Swarm Optimization and Deep Neural Network in Coherent Optical Systems

Photonics, 2019
A novel technique is proposed to implement optical signal-to-noise ratio (OSNR) estimation by using an improved binary particle swarm optimization (IBPSO) and deep neural network (DNN) based on amplitude histograms (AHs) of signals obtained after ...
Xiaoyong Sun, Shaojing Su, Junyu Wei, Xiaojun Guo, Xiaopeng Tan   +4 more
doaj   +1 more source

Direct fiber vector eigenmode multiplexing transmission seeded by integrated optical vortex emitters [PDF]

, 2017
Spatial modes have received substantial attention over the last decades and are used in optical communication applications. In fiber-optic communications, the employed linearly polarized modes and phase vortex modes carrying orbital angular momentum can ...
Cai, Xin-Lun, Chen, Shi, Du, Cheng, Klitis, Charalambos, Li, Shi-Mao, Liu, Jun, Mo, Qi, Sorel, Marc, Wang, An-Dong, Wang, Jian, Yu, Si-Yuan, Zhu, Long   +11 more
core   +1 more source

Programmable Dual‐Wavelength Switchable All‐fiber Laser via Hybrid Optical Amplifier in the NIR‐III Region for Multi‐Contrast Photoacoustic Microscopy

Laser &Photonics Reviews, Volume 19, Issue 13, July 8, 2025.
A novel dual‐wavelength switchable all‐fiber laser operating in the NIR‐III region, utilizing a hybrid optical amplifier, is presented. This laser generates high power‐spectral‐density pulses with flexible pulse widths and high switching frequencies, enabling efficient multi‐contrast photoacoustic microscopy for the detection of microplastics in ...
Yitian Tong, Huajun Tang, Jixiang Chen, Najia Sharmin, Jinge Wei, Kevin K. Tsia, Kenneth K. Y. Wong   +6 more
wiley   +1 more source

OSNR-Aware Modeling and Optimization of Multi-Core Fiber-Based Spectrally–Spatially Flexible Optical Networks

Telecom, 2022
We focus on the optical signal-to-noise ratio (OSNR)-aware optical path (lightpath) planning problem in spectrally and spatially flexible optical networks (SS-FONs) connected using weakly coupled multi-core fibers (MCFs) in which distance-adaptive and ...
Mirosław Klinkowski, Marek Jaworski
doaj   +1 more source

Experimental Demonstration of Dual Polarization Nonlinear Frequency Division Multiplexed Optical Transmission System [PDF]

, 2017
Multi-eigenvalues transmission with information encoded simultaneously in both orthogonal polarizations is experimentally demonstrated. Performance below the HD-FEC limit is demonstrated for 8-bits/symbol 1-GBd signals after transmission up to 207 km of ...
Da Ros, Francesco, da Silva, Edson Porto, Gaiarin, Simone, Perego, Auro Michele, Zibar, Darko   +4 more
core   +2 more sources

Performance Analysis of Microwave Photonic Spectral Filters based on Optical Microcombs

Advanced Physics Research, Volume 4, Issue 1, January 2025.
A comprehensive analysis of microcomb‐based microwave spectral filters based on the transversal filter approach is presented. Theoretical limitations in the filter spectral response from finite tap numbers, experimental errors, and the influence of the input signal's bandwidth are all analyzed.
Yang Li, Yang Sun, Jiayang Wu, Guanghui Ren, Xingyuan Xu, Bill Corcoran, Sai Tak Chu, Brent E. Little, Roberto Morandotti, Arnan Mitchell, David J. Moss   +10 more
wiley   +1 more source

Comparing OSNR based policies for an adaptive-alternative IA-RWA algorithm applied to all-optical networks

Journal of Microwaves, Optoelectronics and Electromagnetic Applications
We propose two policies to select the route for an adaptive-alternative routing algorithm for all-optical networks. We use the NrPSR to find the Nr routes with lower cost for a given source-destination pair according to a cost function expanded in a ...
Carmelo J. A. Bastos-Filho, Rodrigo C. L. Silva, Daniel A. R. Chaves, André V. S. Xavier, Joaquim F. Martins-Filho   +4 more
doaj   +1 more source