Abstract

The recent emergence of many integrated and fiber-optical devices has led to an increased interest in waveguide-grating filters. Among these devices are dispersion-compensating filters that employ chirped gratings to counteract the dispersion of fiber communication systems.^1,2 It is essential to measure both the amplitude and the phase response of grating filters in order to completely characterize their performance. However, making accurate phase measurements is not a trivial task, and thus most reports of these devices do not include such measurements.

© 1995 Optical Society of America