title: Demonstration of phase correlation in multiwavelength mode-locked semiconductor diode lasers.
abstract: Wideband spectral phase correlation is demonstrated from a multiwavelength mode-locked semiconductor laser. By use of frequency-resolved optical gating techniques, significant phase correlation was observed between multiple intracavity oscillating wavelengths, with wavelength separations of ~1 nm . The resultant temporal characteristics show a substantial modulation owing to the spectral coupling induced by intracavity-generated four-wave mixing. This result may lead to novel methods for directly generating ultrafast subpicosecond optical pulse sequences with spectrally tailored amplitude and phase characteristics from actively mode-locked semiconductor lasers.
authors: H
authors: H
authors: Shi
authors: I
authors: I
authors: Nitta
authors: A
authors: A
authors: Schober
authors: P J
authors: PJ
authors: Delfyett
authors: G
authors: G
authors: Alphonse
authors: J
authors: J
authors: Connolly