title: Achromatic optical phase shifter-modulator.
abstract: We propose and demonstrate, theoretically and experimentally, a novel achromatic optical phase shifter-modulator based on a frequency-domain optical delay line configured to maintain zero group delay as variable phase delay is generated by means of tilting a mirror. Compared with previously reported phase shifter-modulators, e.g., based on the Pancharatnam (geometric) phase, our device is high speed and polarization insensitive and produces a large, bounded phase delay that, uniquely, is one-to-one mapped to a measurable parameter, the tilt angle.
authors.forename: A V
authors.initials: AV
authors.lastname: Zvyagin
authors.forename: D D
authors.initials: DD
authors.lastname: Sampson