References
- Chan , K. , Ito , H. and Inaba , H. 1984 . J. Lightwave Technol. , 2 : 234 – 237 .
- Hordvik , A. , Berg , A. and Thingbo , D. Proceedings Ninth ECOC '83 . Geneva. pp. 317 – 320 .
- Stueflotten , S. , Christensen , T. , Iversen , S. , Hellvik , J.O. , Almas , K. , Wien , T. and Graav , A. 1984 . Proceedings OFS '84 , 87 – 90 . Berlin : VDE-Verlag GmbH .
- Batchellor , C.R. and Dakin , J.P. 1987 . U.K. Patent Application 2181536A