Results 201 to 210 of about 46,370 (239)

Intermediate Mode Interchange for Reduction of Differential Mode-Group Delay in Weakly-Coupled 6-Mode Fiber Transmission Line

Optical Fiber Communication Conference, 2016
Intermediate mode interchange using low-crosstalk mode multiplexer/demultiplexer in a 6 mode-division multiplexed transmission line has been demonstrated. We experimentally confirmed the reduction of differential mode group delay and tap size in 12×12 MIMO equalizer.
Yuta Wakayama, Daiki Soma, Koji Igarashi, Hidenori Taga, Takehiro Tsuritani   +4 more
openaire   +2 more sources

A Fixed Differential Group Delay but Varying Second-Order Polarization Mode Dispersion Emulator

2008 Third International Conference on Broadband Communications, Information Technology & Biomedical Applications, 2008
We design a polarization mode dispersion (PMD) emulator with a fixed root-mean-square differential group delay (RMS-DGD) but varying second-order PMD (SOPMD) using only a combination of polarization maintaining fibres and a polarization controller. Besides controlling the mean PMD values of the emulator, simultaneous adjustments in the maximum and ...
Vitalis Musara, Lorinda Wu, Andrew W. R. Leitch   +2 more
openaire   +1 more source

Differential mode group delay measurement for few-mode fibers based on cepstrum analysis

Optics Letters
The differential mode group delay (DMGD) among various modes in few-mode fibers (FMFs) is a critical parameter for characterizing FMFs’ channels. Therefore, achieving a convenient, fast, and accurate measurement of DMGD across the entire communication band for different modes is essential. In this work, we propose a novel, to the best of our knowledge,
Junpeng Liang, Jianwei Tang, Yingying Zhou, Jinlong Wei, Zhongliang Sun, Linsheng Fan, Zhaopeng Xu, Weisheng Hu   +7 more
openaire   +2 more sources

Measuring distributed mode scattering in few mode fibers with high and low differential group delay

2012 IEEE Photonics Society Summer Topical Meeting Series, 2012
We present measurements of distributed mode scattering in up to 30km long few mode fibers using spatially and spectrally resolved (S2) imaging.
L. Gruner-Nielsen, J.W. Nicholson, K. Jespersen, Y. Sun, R. Lingle, D. Jacobsen, B. Palsdottir   +6 more
openaire   +1 more source

Measurement of differential modal group delay of a few-mode fiber using a Fourier domain mode-locked laser

Optics Letters, 2018
We propose and experimentally demonstrate a method for measuring the differential modal group delay (DMGD) of a few-mode fiber using a Fourier domain mode-locked laser (FDML). We use the fast frequency-swept, wavelength-tunable output of the FDML in order to perform time domain measurements of interference of the modes, which is further postprocessed ...
Varun, Kelkar, Smaranika, Swain, Deepa, Venkitesh   +2 more
openaire   +2 more sources

Characterization of differential modal group delay in few-mode fiber using a digital re-sampling technique

Optics Letters, 2023
We characterize the differential modal group delay (DMGD) arising in few-mode fibers (FMFs) based on the digital re-sampling technique, which is commonly used in current digital signal processing flow at the receiver-side. When the DMGD of a 291-m two-mode fiber is characterized over the C-band by using a 500-Mb/s non-return-to-zero (NRZ) signal and 1 ...
Zhiwei Ye, Jilong Li, Yuwen Qin, Meng Xiang, Songnian Fu   +4 more
openaire   +2 more sources

Group delay analysis of differential-mode coupled four lines bandpass filters

2006 Asia-Pacific Microwave Conference, 2006
In this paper, the analytic formula of the group delay of one-stage coupled four lines BPF is proposed. The analytic formula agrees well with measured group delay of one-stage BPF, except for at band-edges. In case of multi-stage BPF, the sum of analyzed group delay of each stage is quite agrees with measured result in UWB band (3.1 GHz - 10.6 GHz).
null Kyoung-Pyo Ahn, null Akira Saitou, null Kazuhiko Honjo   +2 more
openaire   +1 more source

Measurement of local beat length and differential group delay in installed single-mode fibers

Journal of Lightwave Technology, 2000
We present beat length and polarization mode dispersion (PMD) measurements performed on installed fibers. Results regard three different kinds of fibers: standard step index, dispersion shifted and nonzero dispersion (NZD). After a historical comparison with standard differential group delay measurement collected four years ago on the same fibers, we ...
GALTAROSSA, ANDREA, PALMIERI, LUCA, PIZZINAT, ANNA, SCHIANO M, TAMBOSSO T.   +4 more
openaire   +1 more source

Differential group delay monitoring used as feedforward information for polarization mode dispersion compensation

IEEE Photonics Technology Letters, 2002
A novel differential-group-delay (DGD) monitoring scheme that can provide feedforward information to facilitate the compensation of polarization mode dispersion (PMD) is demonstrated. Using a polarization scrambler at the beginning of the link, the instantaneous DGD can be monitored at the end of the link by using a second polarization scrambler ...
L.-S. Yan, Q. Yu, A.B. Sahin, A.E. Willner   +3 more
openaire   +1 more source

Research of Differential Group Delay and Design of Scheme for Polarization Mode Dispersion System Minimization

2006 International Conference - Modern Problems of Radio Engineering, Telecommunications, and Computer Science, 2006
The investigation of differential group delay of system with wavelength-division multiplexing was conducted, the method of minimization of polarization mode dispersion system was proposed and the research of efficiency for proposed method is conducted.
Evgen Chernykhivsky, Mykhailo Klymash
openaire   +1 more source