Title :
Intrinsic apodisation of Bragg gratings written using UV-pulse interferometry
Author :
Cortès, P.Y. ; Ouellette, F. ; LaRochelle, S.
Author_Institution :
Dept. of Electr. & Comput. Eng., Laval Univ., Que., Canada
fDate :
2/19/1998 12:00:00 AM
Abstract :
The authors present a new interferometric technique for writing apodised Bragg gratings. Along the fibre, two UV-pulses interfere with a variable time delay, creating a Gaussian apodisation profile which strongly reduces the reflectivity sidelobes. This method allows the writing of truly apodised gratings by single exposure of a uniform phase-mask
Keywords :
diffraction gratings; light interferometry; optical communication equipment; optical images; phase shifting masks; Bragg gratings; Gaussian apodisation profile; UV-pulse interferometry; intrinsic apodisation; optical communication systems; reflectivity sidelobes; uniform phase-mask; variable time delay;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19980325
