1. [1] P. Sillard, M. Bigot-Astruc, D. Boivin, H. Maerten and L. Provost: ECOC 2011, paper Tu.5.LeCervin.7 (2011).
2. [2] C. Koebele, M. Salsi, L. Milord, R. Ryf, C. Bolle, P. Sillard, S. Bigo and G. Charlet: ECOC 2011, paper Th.13.C.3 (2011).
3. [3] N. Hanzawa, K. Saitoh, T. Sakamoto, T. Matsui, S. Tomita and M. Koshiba: OFC 2011 paper OWA4 (2011).
4. [4] M. Oguma, T. Kitoh, A. Mori and H. Takahashi: ECOC 2010 paper We.8.E.2 (2010).
5. [5] http://www.mitsubishi-cable.co.jp/en/products/group/optical-fiber/square.html