Mode converter based on the long-period fiber gratings written in the two-mode fiber
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TLDR
The fabrication of long period fiber gratings written in two-mode fiber as mode converter to realize the mode conversion between LP01 mode and LP11 mode with an efficiency of up to 99.9% is demonstrated.Abstract:
We demonstrate the fabrication of long-period fiber gratings (LPFGs) written in the two-mode fiber (TMF) by CO2 laser. Both uniform and tilted LPFGs were fabricated to provide the light coupling between LP01 mode and LP11 mode with a coupling efficiency of more than 99%. The writing efficiency and the bandwidth of the LPFG mode converter can be adjusted by changing the tilt angle of the tilted TMF-LPFGs. The torsion sensitivity of conventional and tilted LPFG mode converters were measured to be 0.37 nm/(rad/m) and 0.50 nm/(rad/m), respectively. Two orthogonal vector modes (the HEeven 21and HEodd 21 modes) and corresponding orbital angular momentum state were successfully obtained at the resonance wavelength. The proposed LPFG mode converter could be used as not only a high efficiency wavelength tunable mode converter in the mode division multiplexing system but also a high sensitive torsion sensor in the field of optical sensing.read more
Citations
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Journal ArticleDOI
Generation of Femtosecond Optical Vortex Beams in All-Fiber Mode-Locked Fiber Laser Using Mode Selective Coupler
TL;DR: In this article, a high-order optical vortex pulsed laser based on a mode selective all-fiber fused coupler composed of a singlemode fiber and a few-mode fiber (FMF) was demonstrated.
Journal ArticleDOI
Ultra-Broadband Mode Converter Using Cascading Chirped Long-Period Fiber Grating
TL;DR: In this paper, an ultra-broadband mode converter based on a cascade chirped long-period fiber grating (CLPFG) written in a two-mode fiber was proposed.
Journal ArticleDOI
Orbital Angular Momentum Mode Converter Based on Helical Long Period Fiber Grating Inscribed by Hydrogen–Oxygen Flame
Cailing Fu,Shen Liu,Zhiyong Bai,Jun He,Changrui Liao,Ying Wang,Ziliang Li,Yan Zhang,Kaiming Yang,Bin Yu,Yiping Wang +10 more
TL;DR: In this paper, a high-efficiency grating fabrication method was demonstrated to inscribe helical long period fiber gratings (H-LPFGs) in small numbers by means of twisting a standard single-mode fiber (SMF) during hydrogen-oxygen flame heating and then cutting the helical fiber into in series of sections.
Journal ArticleDOI
Controllable all-fiber generation/conversion of circularly polarized orbital angular momentum beams using long period fiber gratings
TL;DR: In this article, a long period fiber grating (LPFG) system is proposed to realize mode conversions between the higher-order LP core modes in four-mode fiber, which can be potentially used as a controllable higher order OAM beam switch and a physical layer of the translating protocol from the conventional LP modes communication to the OAM modes communication in the future mode carrier telecommunication system and light calculation protocols.
Journal ArticleDOI
Optical vortex generation with wavelength tunability based on an acoustically-induced fiber grating.
Wending Zhang,Keyan Wei,Ligang Huang,Dong Mao,Biqiang Jiang,Feng Gao,Guoquan Zhang,Ting Mei,Jianlin Zhao +8 more
TL;DR: A method to actualize the optical vortex generation with wavelength tunability via an acoustically-induced fiber grating (AIFG) driven by a radio frequency source and the mode conversion efficiency was 95% within the whole tuning spectral range.
References
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Orbital angular momentum: origins, behavior and applications
Alison M. Yao,Miles J. Padgett +1 more
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Mode-Division Multiplexing Over 96 km of Few-Mode Fiber Using Coherent 6 $\,\times\,$ 6 MIMO Processing
R. Ryf,Sebastian Randel,Alan H. Gnauck,C. Bolle,A. Sierra,Sami Mumtaz,Mina Esmaeelpour,Ellsworth Burrows,R.-J. Essiambre,Peter J. Winzer,D. W. Peckham,Alan McCurdy,Robert Lingle +12 more
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6×56-Gb/s mode-division multiplexed transmission over 33-km few-mode fiber enabled by 6×6 MIMO equalization
Sebastian Randel,Roland Ryf,A. Sierra,Peter J. Winzer,Alan H. Gnauck,Cristian Bolle,Rene-Jean Essiambre,David W. Peckham,Alan McCurdy,Robert Lingle +9 more
TL;DR: It is shown that 6×6 MIMO processing can be used to almost completely compensate for crosstalk and intersymbol interference due to mode coupling in a system that transmits uncorrelated 28-GBaud QPSK signals on the six spatial and polarization modes supported by a novel few-mode fiber.
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Mode-selective photonic lanterns for space-division multiplexing
Sergio G. Leon-Saval,Nicolas K. Fontaine,Joel R. Salazar-Gil,Burcu Ercan,Roland Ryf,Joss Bland-Hawthorn +5 more
TL;DR: A 3x1 fiber-based photonic lantern spatial-multiplexer with mode-selectivity greater than 6 dB and transmission loss of less than 0.3 dB is demonstrated, which are to the authors' knowledge the lowest insertion and mode-dependent loss devices.