Page 94 - Fiber Bragg Gratings

3.1 Methods for fiber Bragg grating fabrication 73

Figure 3.13: Reflection spectra from imprinting with different phase masks
as a function of the number of overlaid e-beams exposures of the phase mask.
This grating is discussed in Section 3.1.13. (a) Single-pass field size of 65 /um; (b)
three passes with 65.4, 55.3, and 59.26 /urn; (c) as for (b) with additional 66.04
/xm pass (from: Albert J, Theriault S, Bilodeau F, Johnson D C, Hill K O, Sixt P,
and Rooks M J, "Minimisation of phase errors in long fiber Bragg grating phase
masks made using electron beam lithography "IEEEPhoton. Technol. Lett. 8(10),
1334-1336, 1996. © 1996 IEEE [46]).