title: One-chip integration of optical correlator based on slow-light devices.
abstract: We propose and demonstrate an on-chip optical correlator, in which two types of photonic crystal slow-light waveguides are integrated and operated as an optical delay scanner and a two-photon-absorption photodetector. The footprint of the device, which was fabricated using a CMOS-compatible process, was 1.0 × 0.3 mm(2), which is substantially smaller than that of conventional optical correlators with free-space optics. We observed optical pulses using this device and confirmed the correspondence of pulse waveforms with those observed using a commercial correlator when the pulse width was 5-7 ps. This device will achieve one-chipping of an optical correlator and related measurement instruments.
authors.forename: Shun
authors.initials: S
authors.lastname: Kinugasa
authors.forename: Norihiro
authors.initials: N
authors.lastname: Ishikura
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Ito
authors.forename: Naoya
authors.initials: N
authors.lastname: Yazawa
authors.forename: Toshihiko
authors.initials: T
authors.lastname: Baba