A wide-bandwidth on-chip mirror based on a deeply etched Bragg grating loca
lized over 10 mu m is presented; it exhibits reflectivity over more than 25
nm. Integration within a laser-Mach-Zehnder modulator is shown and the wav
elength-division multiplexing capability of the device demonstrated in a hy
brid Bragg reflector configuration, by showing operation of the same InP ch
ip with fiber gratings from 1534 to 1558 am.