The effect of cladding geometry on the absorption efficiency of double-clad fiber lasers

• Autorzy: Javadimanesh M. , Ghavami S. S. , Khorsandi A.

Identyfikatory

DOI

10.5277/oa160212

• Języki publikacji: EN

Abstrakty

EN

In the present work, the inner cladding geometries of a typical double-clad fiber laser are studied and numerically simulated for different cladding shapes to obtain the maximum absorption efficiency for the pump beam. This is performed by using the ray tracing approach and dislocating the fiber core from the center to impose the asymmetry on the investigated geometries. The high absorption efficiency of ~94.5% was obtained for the optimized offset D-shaped double-clad fiber. The hexagonal shape is proposed as a new geometry for the inner cladding to attain higher absorption efficiency. It was found that the absorption efficiency of ~68% for a symmetrical hexagonal can be improved to ~95% for an asymmetrized hexagonal-shaped double-clad fiber laser. Eventually the genetic algorithm was used to enhance the performance of the investigated geometries. This resulted in the further increasing of pump beam absorption efficiency of 99.5% in the genetic algorithm optimized asymmetrized hexagonal shape.

Słowa kluczowe

EN

double-clad fiber; absorption efficiency; cladding geometry

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Optica Applicata
• Rocznik: 2016
• Tom: Vol. 46, nr 2
• Strony: 277--289
• Opis fizyczny: Bibliogr. 13 poz., rys.

Twórcy

autor

Javadimanesh M.

• Department of Physics, University of Isfahan, 81746-73441 Isfahan, Iran

autor

Ghavami S. S.

• Department of Physics, University of Isfahan, 81746-73441 Isfahan, Iran

autor

Khorsandi A.

• Department of Physics, University of Isfahan, 81746-73441 Isfahan, Iran

Bibliografia

• [1] NARRO-GARCÍA R., RODRÍGUEZ E., PONCE L., DE POSADA E., FLORES T., ARRONTE M., Description of a ray trace algorithm for the evaluation of pump power absorption in double-clad fibers, Optica Applicata 42(3), 2012, pp. 571–585.
• [2] JIANQIU XU, JUNHUA LU, JIANREN LU, UEDA K., Influence of cross-sectional shape on absorption characteristics of double-clad fiber lasers, Optical Engineering 42(9), 2003, pp. 2527–2533.
• [3] KOUZNETSOV D., MOLONEY J.V., Efficiency of pump absorption in double-clad fiber amplifiers. II. Broken circular symmetry, Journal of the Optical Society of America B 19(6), 2002, pp. 1259–1263.
• [4] LIU A., SONG J., KAMATANI K., UEDA K., Rectangular double-clad fibre laser with two-end-bundled pump, Electronics Letters 32(18), 1996, pp. 1673–1674.
• [5] KONIECZNY P., ŚWIDERSKI J., ZAJĄC A., SKÓRCZAKOWSKI M., Analysis of activation of active double-clad optical fibers, Optica Applicata 35(4), 2005, pp. 955–968.
• [6] YAHUA LI, JACKSON S.D., FLEMING S., High absorption and low splice loss properties of hexagonal double-clad fiber, IEEE Photonics Technology Letters 16(11), 2004, pp. 2502–2504.
• [7] ANPING LIU, KENICHI UEDA, The absorption characteristics of circular, offset, and rectangular double-clad fibers, Optics Communications 132(5–6), 1996, pp. 511–518.
• [8] LEPROUX P., FÉVRIER S., DOYA V., ROY P., PAGNOUX D., Modeling and optimization of double-clad fiber amplifiers using chaotic propagation of the pump, Optical Fiber Technology 7(4), 2001, pp. 324–339.
• [9] JUN ZHOU, QIHONG LOU, TIEJUN LI, ZHIJIANG WANG, JINGXING DONG, RUNRONG WEI, New inner cladding shape for high-power double-clad fiber lasers, Proceedings of SPIE 4914, 2002, pp. 146–150.
• [10] MICHEL C., TASCU S., DOYA V., LEGRAND O., MORTESSAGNE F., Gain-controlled wave chaos in a chaotic optical fibre, Journal of the European Optical Society – Rapid publications 4, 2009, article 09020.
• [11] NARRO-GARCÍA R., ARRONTE M., GUERRERO-CONTRERAS J., RODRÍGUEZ E., Study of the pump absorption efficiency in D-shaped double clad optical fiber, Optica Applicata 42(3), 2012, pp. 587–596.
• [12] POPOV A., Genetic Algorithms for Optimization, User Manual, Hamburg, Vol. 2013, 2005.
• [13] DOBROWOLSKI J.A., HO F.C., BELKIND A., KOSS V.A., Merit functions for more effective thin film calculations, Applied Optics 28(14), 1989, pp. 2824–2831.

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.