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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 22, Iss. 10 — May. 19, 2014
  • pp: 11610–11619

All-fiber fused directional coupler for highly efficient spatial mode conversion

Rand Ismaeel, Timothy Lee, Bernard Oduro, Yongmin Jung, and Gilberto Brambilla  »View Author Affiliations


Optics Express, Vol. 22, Issue 10, pp. 11610-11619 (2014)
http://dx.doi.org/10.1364/OE.22.011610


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Abstract

We model and demonstrate a simple mode selective all-fiber coupler capable of exciting specific higher order modes in two- and few-mode fibres with high efficiency and purity. The coupler is based on inter-modally phase-matching the propagation constants in each arm of the asymmetric fused coupler, formed by dissimilar fibres. At a specific coupler diameter, the launched fundamental LP01 mode is coupled into the higher order mode (LP11, LP21, LP02) in the other arm, over a broadband wave-length range around 1550 nm. Unlike other techniques, the demonstrated coupler is composed of a multimode fiber that is weakly fused with a phase matched conventional single mode telecom fiber (SMF-28). The beating between the supermodes at the coupler waist produces a periodic power transfer between the two arms, and therefore, by monitoring the beating while tapering, it is possible to obtain optimum selection for the desired mode. High coupling efficiencies in excess of 90% for all the higher order modes were recorded over 100 nm spectral range, while insertion losses remain as low as 0.5 dB. Coupling efficiency can be further enhanced by performing slow tapering at high temperature, in order to precisely control the coupler cross-section geometry.

© 2014 Optical Society of America

OCIS Codes
(060.0060) Fiber optics and optical communications : Fiber optics and optical communications
(060.1810) Fiber optics and optical communications : Buffers, couplers, routers, switches, and multiplexers

ToC Category:
Fiber Optics

History
Original Manuscript: February 27, 2014
Revised Manuscript: April 7, 2014
Manuscript Accepted: April 23, 2014
Published: May 6, 2014

Citation
Rand Ismaeel, Timothy Lee, Bernard Oduro, Yongmin Jung, and Gilberto Brambilla, "All-fiber fused directional coupler for highly efficient spatial mode conversion," Opt. Express 22, 11610-11619 (2014)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-22-10-11610


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References

  1. D. J. Richardson, J. M. Fini, L. E. Nelson, “Space-division multiplexing in optical fibres,” Nat. Photonics 7, 354–362 (2013). [CrossRef]
  2. R. Ryf, S. Randel, A. H. Gnauck, C. Bolle, A. Sierra, S. Mumtaz, M. Esmaeelpour, E. C. Burrows, R. Essiambre, P. J. Winzer, D. W. Peckham, A. H. McCurdy, R. Lingle, “Mode-division multiplexing over 96 km of few-mode fiber using coherent 6 × 6 MIMO processing,” J. Lightwave Technol. 30, 521–531 (2012). [CrossRef]
  3. S. Leon-Saval, T. Birks, J. Bland-Hawthorn, M. Englund, “Multimode fiber devices with single-mode performance,” Opt. Lett. 30, 2545–2547 (2005). [CrossRef] [PubMed]
  4. S. Leon-Saval, A. Argyros, J. Bland-Hawthorn, “Photonic lanterns: a study of light propagation in multimode to single-mode converters,” Opt. Express 18, 8430–8439 (2010). [CrossRef] [PubMed]
  5. S. Leon-Saval, N. Fontaine, J. Salazar-Gil, B. Ercan, R. Ryf, J. Bland-Hawthorn, “Mode-selective photonic lanterns for space-division multiplexing,” Opt. Express 22, 1036–1044 (2014). [CrossRef] [PubMed]
  6. N. K. Fontaine, S. G. Leon-Saval, R. Ryf, J. R. S. Gil, B. Ercan, J. Bland-Hawthorn, “Mode-selective dissimilar fiber photonic-lantern spatial multiplexers for few-mode fiber,” Optical Communication (ECOC 2013), 39th European Conference and Exhibition, pp. 1, 3, 22–26 Sept. 2013
  7. A. M. Vengsarkar, J. A. Greene, K. A. Murphy, “Photoinduced refractive-index changes in two-mode elliptical-core fibers: sensing applications,” Opt. Lett. 16, 1541–1543 (1991). [CrossRef] [PubMed]
  8. C. D. Poole, C. D. Townsend, K. T. Nelson, “Helical-grating two-mode fiber spatial-mode coupler,” J. Light-waveTechnol. 9, 598–604 (1991). [CrossRef]
  9. H. G. Park, B. Y. Kim, “Intermodal coupler using permanently photoinduced grating in two-modeoptical fiber,” Electron. Lett. 25, 797–799 (1989). [CrossRef]
  10. F. A. Castro, S. R. M. Carneiro, O. Lisboa, S. L. A. Carrara, “Two-mode optical fiber accelerometer,” Opt. Lett. 17, 1474–1475 (1992). [CrossRef] [PubMed]
  11. S. Y. Haung, J. N. Blake, B. Y. Kim, “Perturbation effects on mode propagation in highly elliptical core two-mode fibers,” J. Lightwave Technol. 8, 23–33 (1990). [CrossRef]
  12. J. N. Blake, S. U. Huang, B. Y. Kim, H. J. Shaw, “Strain effects on highly elliptical core two-mode fibers,” Opt. Lett. 12, 732–734 (1987). [CrossRef] [PubMed]
  13. W. V. Sorin, B. Y. Kim, H. J. Shaw, “Highly selective evanescent modal filter for two-mode optical fibers,” Opt. Lett. 11, 581–583 (1986). [CrossRef] [PubMed]
  14. R. C. Youngquist, J. L. Brooks, H. J. Shaw, “Two-mode fiber modal coupler,” Opt. Lett. 9, 177–179 (1984). [CrossRef] [PubMed]
  15. M. Vaziri, C. Chen, “An etched two-mode fiber modal coupling element,” J. Lightwave Technol. 15, 474–481 (1997). [CrossRef]
  16. Y. Shou, J. Bures, S. Lacroix, X. Daxhelet, “Mode separation in fused fiber coupler made of two-mode fibers,” Opt. Fiber Technol. 5, 92–104 (1999). [CrossRef]
  17. K. Y. Song, I. K. Hwang, S. H. Yun, B. Y. Kim, “High performance fused-type mode selective coupler for two-mode fiber devices,” in Opt. Fibre Commun. Conf., Baltimore, 7–10 Mar (2000).
  18. K. Y. Song, I. K. Hwang, S. H. Yun, B. Y. Kim, “High performance fused-type mode-selective coupler using elliptical core two-mode fiber at 1550nm,” IEEE Photon. Technol. Lett. 14, 501–503 (2002). [CrossRef]
  19. Y. Jung, R. Chen, R. Ismaeel, G. Brambilla, S. Alam, I. Giles, D. Richardson, “Dual mode fused optical fiber couplers suitable for mode division multiplexed transmission,” Opt. Express 21, 24326–24331 (2013). [CrossRef] [PubMed]
  20. S. Yerolatsitis, I. Gris-Sánchez, T. Birks, “Adiabatically-tapered fiber mode multiplexers,” Opt. Express 22, 608–617 (2014). [CrossRef] [PubMed]
  21. K. Chiang, “Effects of cores in fused tapered single-mode fiber couplers,” Opt. Lett. 12, 431–433 (1987). [CrossRef] [PubMed]
  22. G. Brambilla, “Optical fiber nanowires and microwires: a review,” J. Opt. 12, 043001 (2010). [CrossRef]
  23. A. W. Snyder, X. H. Zheng, “Fused couplers of arbitrary cross-section,” Electron. Lett. 21, 1079–1080 (1985). [CrossRef]
  24. S. Lacroix, F. Gonthier, J. Bures, “Modeling of symmetric 2× 2 fused-fiber couplers,” Appl. Opt. 33, 8361–8369 (1994). [CrossRef] [PubMed]
  25. F. P. Payne, C. D. Hussey, M. S. Yataki, “Polarisation analysis of strongly fused and weakly fused tapered couplers,” Electron. Lett. 21, 561–563 (1985). [CrossRef]
  26. H. Chang, T. Lin, T. Wu, “Accurate coupling coefficients for fiber couplers with weakly fused cross sections,” Appl. Opt. 34, 6168–6171 (1995). [CrossRef] [PubMed]

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