Hn. Rourke et al., FABRICATION AND CHARACTERIZATION OF LONG, NARROW-BAND FIBER GRATINGS BY PHASE MASK SCANNING, Electronics Letters, 30(16), 1994, pp. 1341-1342
Fibre Bragg gratings up to 50mm in length have been fabricated using a
phase mask scanning technique. Reflectivities of up to 70% and linewi
dths as narrow as 0.029nm have been measured. The fabrication techniqu
e lends itself to writing gratings with controllable length, chirp and
shading.