An apodized in-fibre Bragg grating reflector is fabricated using the phase mask photoimprinting technique. The reflector has a centre wavelength of 1550 nm, a bandwidth of 0.22 nm and a peak reflectivity of 90%. At 0.4 nm (50 GHz) from the centre wavelength the reflectivity is 40 dB lower than the peak reflectivity; this is an improvement of more than 20 dB over an unapodized Bragg grating reflector with similar bandwidth and peak reflectivity.
Electronics Letters
Department of Electronics

Malo, B. (B.), Theriault, S. (S.), Johnson, D.C. (D. C.), Bilodeau, F. (F.), Albert, J, & Hill, K.O. (K. O.). (1995). Apodised in-fibre Bragg grating reflectors photoimprinted using a phase mask. Electronics Letters, 31(3), 223–225. doi:10.1049/el:19950150