title: Integrated-optic acoustically tunable reflection filter.
abstract: We demonstrate a two-stage, integrated-optic, acoustically tunable filter formed by reflecting the output of a single stage acousto-optic filter back through the filter by means of an integral mirror. Relative to a single-stage device, this double-pass configuration provides greatly improved sidelobe suppression (to approximately -20 dB) and a 72% reduction in filter bandwidth (to less than 0.9 nm at a wavelength of 1.52 microm). The performance of this device is shown to be equal to the far more difficult to fabricate cascaded pair of strictly matched acousto-optic filters.
authors.forename: D A
authors.initials: DA
authors.lastname: Smith
authors.forename: J J
authors.initials: JJ
authors.lastname: Johnson
authors.forename: J E
authors.initials: JE
authors.lastname: Baran
authors.forename: V S
authors.initials: VS
authors.lastname: Shah
authors.forename: L
authors.initials: L
authors.lastname: Curtis
authors.forename: K W
authors.initials: KW
authors.lastname: Cheung