Results 1 to 10 of about 59,667 (255)

Few-Mode Fibers With Uniform Differential Mode Group Delay for Microwave Photonic Signal Processing [PDF]

IEEE Access, 2020
We present a novel design of few-mode fiber (FMF) with a uniform differential mode group delay (U-DMGD) among propagating modes and apply the FMF to a single-fiber delay line module for implementing microwave photonic finite impulse response (FIR ...
Jian Zhao, Huan Zhang, Zhiqun Yang, Jinsheng Xu, Tianhua Xu, Chao Wang   +5 more
doaj   +6 more sources

Design of Few-Mode Fibers With Arbitrary and Flattened Differential Mode Delay [PDF]

IEEE Photonics Technology Letters, 2013
This letter proposes the use of a refractive index profile with a graded core and a cladding trench for the design of few-mode fibers, aiming an arbitrary differential mode delay (DMD) flattened over the C+ L band. By optimizing the core grading exponent and the dimensioning of the trench, a deviation lower than 0.01 ps/km from a target DMD is observed
Helena Silva, Filipe M Ferreira, Daniel Fonseca   +2 more
exaly   +2 more sources

A Compact Dual-Band Differential Negative Group Delay Circuit With Wideband Common Mode Suppression

IEEE Journal of Microwaves, 2022
A compact dual-band differential negative group delay (DNGD) circuit with wideband common mode suppression is proposed. Two small 180° phase shift swap structures of double-sided parallel striplines (DSPS) are adopted to realize intrinsic wideband
Zhongbao Wang, Shipeng Zhao, Hongmei Liu, Shaojun Fang   +3 more
doaj   +3 more sources

Dynamics Simulation of Self-Mode-Locking in a Semiconductor Disk Laser Using Delay Differential Equations

Photonics, 2022
Self-mode-locked semiconductor disk lasers possess compact resonant cavity and stable construction. These devices have a wide application prospect because of their picosecond to sub-picosecond pulse width, excellent beam quality and tailorable emission ...
Tao Wang, Renjiang Zhu, Cunzhu Tong, Yunjie Liu, Peng Zhang   +4 more
doaj   +3 more sources

On-chip differential mode group delay manipulation based on 3D waveguides

Chip
Mode-division multiplexing based on few-mode optical fiber is a promising technology to increase the transmission capacity of optical communication systems, where multi-input multi-output (MIMO) digital signal processing (DSP) is employed to (de ...
Xiaofeng Liu, Quandong Huang, Jiaqi Ran, Jiali Zhang, Ou Xu, Di Peng, Yuwen Qin   +6 more
doaj   +3 more sources

Design of Few-Mode Fibers With M-modes and Low Differential Mode Delay [PDF]

Journal of Lightwave Technology, 2014
In this paper, we investigate the design of few-mode fibers (FMFs) guiding 2 to 12 linearly polarized (LP) modes with low differential mode delay (DMD) over the C-band, suitable for long-haul transmission. Two different types of refractive index profile have been considered: a graded-core with a cladding trench (GCCT) profile and a multi-step-index ...
Ferreira, Filipe, Fonseca, Daniel, Silva, Henrique J.A.   +2 more
  +5 more sources

Twisted Silica Microstructured Optical Fiber with Equiangular Spiral Six-Ray Geometry

Fibers, 2021
This work presents fabricated silica microstructured optical fiber with special equiangular spiral six-ray geometry, an outer diameter of 125 µm (that corresponds to conventional commercially available telecommunication optical fibers of ratified ITU-T ...
Anton V. Bourdine, Alexey Yu. Barashkin, Vladimir A. Burdin, Michael V. Dashkov, Vladimir V. Demidov, Konstantin V. Dukelskii, Alexander S. Evtushenko, Yaseera Ismail, Alexander V. Khokhlov, Artem A. Kuznetsov, Alexandra S. Matrosova, Oleg G. Morozov, Grigori A. Pchelkin, Francesco Petruccione, Airat Zh. Sakhabutdinov, Ghanshyam Singh, Egishe V. Ter-Nersesyants, Manish Tiwari, Elena S. Zaitseva, Vijay Janyani, Juan Yin   +20 more
doaj   +1 more source

Twisted Few-Mode Optical Fiber with Improved Height of Quasi-Step Refractive Index Profile

Sensors, 2022
This work presents designed and fabricated silica few-mode optical fiber (FMF) with induced twisting 10 and 66 revolutions per meter, core diameter 11 µm, typical “telecommunication” cladding diameter 125 µm, improved height of quasi-step refractive ...
Anton V. Bourdine, Vladimir V. Demidov, Artem A. Kuznetsov, Alexander A. Vasilets, Egishe V. Ter-Nersesyants, Alexander V. Khokhlov, Alexandra S. Matrosova, Grigori A. Pchelkin, Michael V. Dashkov, Elena S. Zaitseva, Azat R. Gizatulin, Ivan K. Meshkov, Airat Zh. Sakhabutdinov, Eugeniy V. Dmitriev, Oleg G. Morozov, Vladimir A. Burdin, Konstantin V. Dukelskii, Yaseera Ismail, Francesco Petruccione, Ghanshyam Singh, Manish Tiwari, Juan Yin   +21 more
doaj   +1 more source

Delay differential equations for mode-locked semiconductor lasers [PDF]

Optics Letters, 2004
We propose a new model for passive mode locking that is a set of ordinary delay differential equations. We assume a ring-cavity geometry and Lorentzian spectral filtering of the pulses but do not use small gain and loss and weak saturation approximations. By means of a continuation method, we study mode-locking solutions and their stability.
Kozyreff, Gregory, Turaev, Dmitry, Vladimirov, Andrei G.   +2 more
openaire   +3 more sources

Self−Mode−Locked 2−μm GaSb−Based Optically Pumped Semiconductor Disk Laser

Applied Sciences, 2023
We present a mode−locked GaSb−based optically pumped semiconductor disk laser operating at 2 µm based on the self−mode−locked mechanism. Using the delay differential equation model, we discuss the influence of cavity length on the stability of self−mode ...
Jian Feng, Bo Meng, Jinming Shang, Xin Zhang, Cunzhu Tong, Yu Zhang, Zhichuan Niu, Lijun Wang   +7 more
doaj   +1 more source