[1] R. Ramaswami, K. Sivarajan, G. Sasaki. Optical Networks: a Practical Perspective(2009).
[2] A. Mokhtar, M. Azizoğlu. Adaptive wavelength routing in all-optical networks. IEEE/ACM Trans. Netw., 6, 197-206(1998).
[3] H. Zang, J. P. Jue, B. Mukherjee. A review of routing and wavelength assignment approaches for wavelength-routed optical WDM networks. Opt. Netw. Mag., 1, 47-60(2000).
[4] P. J. Winzer, A. H. Gnauck, C. R. Doerr, M. Magarini, L. L. Buhl. Spectrally efficient long-haul optical networking using 112-Gb/s polarization-multiplexed 16-QAM. J. Lightwave Technol., 28, 547-556(2010).
[5] D. J. Richardson, J. M. Fini, L. E. Nelson. Space-division multiplexing in optical fibres. Nat. Photonics, 7, 354-362(2013).
[6] X. Chen, A. Li, J. Ye, A. A. Amin, W. Shieh. Demonstration of few-mode compatible optical add/drop multiplexer for mode-division multiplexed superchannel. J. Lightwave Technol., 31, 641-647(2013).
[7] R. Y. Gu, E. Ip, M.-J. Li, Y.-K. Huang, J. M. Kahn. Experimental demonstration of a spatial light modulator few-mode fiber switch for space-division multiplexing. Frontiers in Optics, FW6B-4(2013).
[8] C. Xia, N. Chand, A. M. Velázquez-Benítez, Z. Yang, X. Liu, J. E. Antonio-Lopez, H. Wen, B. Zhu, N. Zhao, F. Effenberger, R. Amezcua-Correa, G. Li. Time-division-multiplexed few-mode passive optical network. Opt. Express, 23, 1151-1158(2015).
[9] J. Wang, J.-Y. Yang, I. M. Fazal, N. Ahmed, Y. Yan, H. Hao, Y. Ren, Y. Yue, S. Dolinar, M. Tur, A. E. Willner. Terabit free-space data transmission employing orbital angular momentum multiplexing. Nat. Photonics, 6, 488-496(2012).
[10] N. Bozinovic, Y. Yue, Y. Ren, M. Tur, P. Kristensen, H. Huang, A. E. Willner, S. Ramachandran. Terabit-scale orbital angular momentum mode division multiplexing in fibers. Science, 340, 1545-1548(2013).
[11] A. M. Yao, M. J. Padgett. Orbital angular momentum: origins, behavior and applications. Adv. Opt. Photon., 3, 161-204(2011).
[12] L. Allen, M. W. Beijersbergen, R. J. C. Spreeuw, J. P. Woerdman. Orbital angular momentum of light and the transformation of Laguerre-Gaussian laser modes. Phys. Rev. A, 45, 8185-8189(1992).
[13] H. Huang, G. Xie, Y. Yan, N. Ahmed, Y. Ren, Y. Yue, D. Rogawski, M. J. Willner, B. I. Erkmen, K. M. Birnbaum, S. J. Dolinar, M. P. J. Lavery, M. J. Padgett, M. Tur, A. E. Willner. 100 Tbit/s free-space data link enabled by three-dimensional multiplexing of orbital angular momentum, polarization, and wavelength. Opt. Lett., 39, 197-200(2014).
[14] A. E. Willner, H. Huang, Y. Yan, Y. Ren, N. Ahmed, G. Xie, C. Bao, L. Li, Y. Cao, Z. Zhao, J. Wang, M. P. J. Lavery, M. Tur, S. Ramachandran, A. F. Molisch, N. J. Ashrafi, S. Ashrafi. Optical communications using orbital angular momentum beams. Adv. Opt. Photon., 7, 66-106(2015).
[15] G. Gibson, J. Courtial, M. Padgett, M. Vasnetsov, V. Pas’ko, S. Barnett, S. Franke-Arnold. Free-space information transfer using light beams carrying orbital angular momentum. Opt. Express, 12, 5448-5456(2004).
[16] Y. Ren, Z. Wang, P. Liao, L. Li, G. Xie, H. Huang, Z. Zhao, Y. Yan, N. Ahmed, A. Willner, M. P. J. Lavery, N. Ashrafi, S. Ashrafi, R. Bock, M. Tur, I. B. Djordjevic, M. A. Neifeld, A. E. Willner. Experimental characterization of a 400 Gbit/s orbital angular momentum multiplexed free-space optical link over 120 m. Opt. Lett., 41, 622-625(2016).
[17] Y. Zhao, J. Liu, J. Du, S. Li, Y. Luo, A. Wang, L. Zhu, J. Wang. Experimental demonstration of 260-meter security free-space optical data transmission using 16-QAM carrying orbital angular momentum (OAM) beams multiplexing. Optical Fiber Communication Conference, Th1H.3(2016).
[18] Y. Yue, H. Huang, N. Ahmed, Y. Yan, Y. Ren, G. Xie, D. Rogawski, M. Tur, A. Willner. Reconfigurable switching of orbital-angular-momentum-based free-space data channels. Opt. Lett., 38, 5118-5121(2013).
[19] H. Huang, Y. Yue, Y. Yan, N. Ahmed, Y. Ren, M. Tur, A. E. Willner. Liquid-crystal-on-silicon-based optical add/drop multiplexer for orbital-angular-momentum-multiplexed optical links. Opt. Lett., 38, 5142-5145(2013).
[20] N. Ahmed, H. Huang, Y. Ren, Y. Yan, G. Xie, M. Tur, A. E. Willner. Reconfigurable 2 × 2 orbital angular momentum based optical switching of 50-Gbaud QPSK channels. Opt. Express, 22, 756-761(2014).
[21] M. J. Willner, H. Huang, N. Ahmed, G. Xie, Y. Ren, Y. Yan, M. P. J. Lavery, M. J. Padgett, M. Tur, A. E. Willner. Reconfigurable orbital angular momentum and polarization manipulation of 100 Gbit/s QPSK data channels. Opt. Lett., 38, 5240-5243(2013).
[22] A. J. Willner, Y. Ren, G. Xie, Z. Zhao, Y. Cao, L. Li, N. Ahmed, Z. Wang, Y. Yan, P. Liao, C. Liu, M. Mirhosseini, R. W. Boyd, M. Tur, A. E. Willner. Experimental demonstration of 20 Gbit/s data encoding and 2 ns channel hopping using orbital angular momentum modes. Opt. Lett., 40, 5810-5813(2015).
[23] Y. Yan, Y. Yue, H. Huang, Y. Ren, N. Ahmed, M. Tur, S. Dolinar, A. E. Willner. Multicasting in a spatial division multiplexing system based on optical orbital angular momentum. Opt. Lett., 38, 3930-3933(2013).