L. Dong, B. Ortega, L. Reekie, J. P. de Sandro, D. O. Culverhouse, S. G. Farwell, and R. I. Laming, "Novel High Performance All-fibre Optical Add/Drop Multiplexer Based on a Selective Fused Coupler and a Single Fibre Bragg Grating,"
in Optical Fiber Communication Conference,
Vol. 2 of 1998 OSA Technical Digest Series
(Optical Society of America, 1998), paper PD9.