Non-Hermitian Mode Cleaning in Periodically Modulated Multimode Fibers

被引：8

作者：

Akhter, Mohammad Nayeem ^{[1
]}

Ivars, Salim B. ^{[1
]}

Botey, Muriel ^{[1
]}

Herrero, Ramon ^{[1
]}

Staliunas, Kestutis ^{[1
,2
,3
]}

机构：

[1] Univ Politecn Cataluna, Dep Fis, Rambla St Nebridi 22, Terrassa 08222, Barcelona, Spain

[2] Inst Catalana Recerca & Estudis Avancats, Passeig Lluis Co 23, Barcelona 08010, Spain

[3] Vilnius Univ, Fac Phys, Laser Res Ctr, Sauletekio Ave 10, LT-10223 Vilnius, Lithuania

来源：

PHYSICAL REVIEW LETTERS | 2023年 / 131卷 / 04期

基金：

欧盟地平线“2020”;

关键词：

LASER; INDEX; GRATINGS; SPECKLE;

D O I：

10.1103/PhysRevLett.131.043604

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We show that the simultaneous modulation of the propagation constant and of the gain/loss coefficient along the graded index multimode fibers results in unidirectional coupling among the modes, which leads to either the enhancement or the reduction of the excitation of higher order transverse modes, depending on the modulation parameters. In the latter case, effective mode cleaning is predicted, ideally resulting in single-mode spatially coherent output. The effect is semi-analytically predicted on a simplified Gaussian beam approximation and numerically proven by solving the wave propagation equation introducing the non-Hermitian modulated potential.

引用

页数：6

共 28 条

[1] Modulational instability in optical fibers with variable dispersion [J].

Abdullaev, FK ;

Darmanyan, SA ;

Kobyakov, A ;

Lederer, F .

PHYSICS LETTERS A, 1996, 220 (4-5) :213-218

[2]

aps, About us, DOI [10.1103/PhysRevLett.131.043604, DOI 10.1103/PHYSREVLETT.131.043604]

[3] Geometric parametric instability in periodically modulated graded-index multimode fibers [J].

Arabi, C. Mas ;

Kudlinski, A. ;

Mussot, A. ;

Conforti, M. .

PHYSICAL REVIEW A, 2018, 97 (02)

[4] Polarization-Dependent Scattering of Nanogratings in Femtosecond Laser Photowritten Waveguides in Fused Silica [J].

Cheng, Guanghua ;

Lin, Ling ;

Mishchik, Konstantin ;

Stoian, Razvan .

MATERIALS, 2022, 15 (16)

[5] Parametric instabilities in modulated fiber ring cavities [J].

Conforti, Matteo ;

Copie, Francois ;

Mussot, Arnaud ;

Kudlinski, Alexandre ;

Trillo, Stefano .

OPTICS LETTERS, 2016, 41 (21) :5027-5030

[6] Kerr beam self-cleaning on the LP11 mode in graded-index multimode fibers [J].

Deliancourt, E. ;

Fabert, M. ;

Tonello, A. ;

Krupa, K. ;

Desfarges-Berthelemot, A. ;

Kermene, V. ;

Millot, G. ;

Barthelemy, A. ;

Wabnitz, S. ;

Couderc, V. .

OSA CONTINUUM, 2019, 2 (04) :1089-1096

[7] Controlling the evolution of nondiffracting speckle by complex amplitude modulation on a phase-only spatial light modulator [J].

Dudley, Angela ;

Vasilyeu, Ruslan ;

Belyi, Vladimir ;

Khilo, Nikolai ;

Ropot, Piotr ;

Forbes, Andrew .

OPTICS COMMUNICATIONS, 2012, 285 (01) :5-12

[8] Femtosecond laser fabrication of birefringent directional couplers as polarization beam splitters in fused silica [J].

Fernandes, Luis A. ;

Grenier, Jason R. ;

Herman, Peter R. ;

Aitchison, J. Stewart ;

Marques, Paulo V. S. .

OPTICS EXPRESS, 2011, 19 (13) :11992-11999

[9] EXPERIMENTAL INVESTIGATION OF MODE-COUPLING IN A MULTIMODE GRADED-INDEX FIBER CAUSED BY PERIODIC MICROBENDS USING COMPUTER-GENERATED SPATIAL FILTERS [J].

GARITCHEV, VP ;

GOLUB, MA ;

KARPEEV, SV ;

KRIVOSHLYKOV, SG ;

PETROV, NI ;

SISSAKIAN, IN ;

SOIFER, VA ;

HAUBENREISSER, W ;

JAHN, JU ;

WILLSCH, R .

OPTICS COMMUNICATIONS, 1985, 55 (06) :403-405

[10] Acousto-optic control of speckle contrast in multimode fibers with a cylindrical piezoelectric transducer oscillating in the radial direction [J].

Ha, Woosung ;

Lee, Sejin ;

Jung, Yongmin ;

Kim, Jun Ki ;

Oh, Kyunghwan .

OPTICS EXPRESS, 2009, 17 (20) :17536-17546

← 1 2 3 →