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6.7 In-coupler Bragg grating filters 287
Figure 6.42: Transmission and reflection characteristics for the GFC as a
function of the strength of the grating (courtesy Philip Russell from: Archambault
J.-L., Russell P. St. J., Barcelos S., Hua P., and Reekie L., "Grating frustrated
coupler: a novel channel-dropping filter in single-mode optical fiber,"Op£. Lett.
19(3), 180-182, 1994. Ref. [83]).
Figure 6.43: Transmission and reflection characteristics of a GFC. Simula-
4
tion for L c = 2.5 mm, L g = 4.5 mm, Sn = 3 X 1(T , n eff = 1.45. A Bragg = 1534.7
nm (from: Wolting S., "Grating frustrated couplers," BT Research Laboratories
Summer Studentship Report, 1995. Ref. [84]).
