[1] D. Richardson, J. Fini, and L. Nelson, “Space-division multiplexing in optical fibres,” Nat. Photonics 7, 354–362 (2013).
[2] G. Stepniak, L. Maksymiuk, and J. Siuzdak, “Binary-phase spatial light filters for mode-selective excitation of multimode fibers,” J. Lightwave Technol. 29, 1980–1987 (2011).
[3] J. Carpenter and T. D. Wilkinson, “Characterization of multimode fiber by selective mode excitation,” J. Lightwave Technol. 30, 1386–1392 (2012).
[4] S. G. Leon-Saval, A. Argyros, and J. Bland-Hawthorn, “Photonic lanterns: a study of light propagation in multimode to singlemode converters,” Opt. Express 18, 8430–8439 (2010).
[5] S. G. Leon-Saval, A. Argyros, and J. Bland-Hawthorn, “Photonic lanterns,” Nanophotonics 2, 429–440 (2013).
[6] W. V. Sorin, B. Y. Kim, and H. J. Shaw, “Highly selective evanescent modal filter for two-mode optical fibers,” Opt. Lett. 11, 581–583 (1986).
[7] A. Li, X. Chen, A. A. Amin, and W. Shieh, “Fused fiber mode couplers for few-mode transmission,” IEEE Photon. Technol. Lett. 21, 1953–1956 (2012).
[8] R. Ismaeel, T. Lee, B. Oduro, Y. Jung, and G. Brambilla, “All-fiber fused directional coupler for highly efficient spatial mode conversion,” Opt. Express 22, 11610–11619 (2014).
[9] K. Lai, S. G. Leon-Saval, A. Witkowska, W. J. Wadsworth, and T. A. Birks, “Wavelength-independent all-fiber mode converters,” Opt. Lett. 32, 328–330 (2007).
[10] M.-Y. Chen and J. Zhou, “Mode converter based on mode coupling in an asymmetric dual-core photonic crystal fibre,” J. Opt. A 10, 115304 (2008).
[11] F. Luan, A. K. George, T. D. Hedley, G. J. Pearce, D. M. Bird, J. C. Knight, and P. S. J. Russell, “All-solid photonic bandgap fiber,” Opt. Lett. 29, 2369–2371 (2004).
[12] G. Bouwmans, L. Bigot, Y. Quiquempois, F. Lopez, L. Provino, and M. Douay, “Fabrication and characterization of an all-solid 2D photonic bandgap fiber with a low-loss region ( 20 dB/km) around 1550 nm,” Opt. Express 13, 8452–8459 (2005).
[13] G. Ren, P. Shum, L. Zhang, and X. Yu, “Low-loss all-solid photonic bandgap fiber,” Opt. Lett. 32, 1023–1025 (2007).
[14] C. Markos, I. Kubat, and O. Bang, “Hybrid polymer photonic crystal fiber with integrated chalcogenide glass nanofilms,” Sci. Rep. 4, 06057 (2014).
[15] B. E. Little and W. P. Huang, “Coupled-mode theory for optical waveguides,” Prog. Electromagn. Res. 10, 217–270 (1995).
[16] C. Markos,W. Yuan, K. Vlachos, G. E. Town, and O. Band, “Labelfree biosensing with high sensitivity in dual-core microstructured polymer optical fibers,” Opt. Express 19, 7790–7798 (2011).
