title: Disorder mapping in VCSELs using frequency-selective feedback.
abstract: We report on a simple method with a high spectral and spatial resolution for mapping variations in the cavity resonance of a plano-planar broad-area laser based on frequency-selective feedback. The demonstration experiment uses a vertical-cavity surface-emitting-laser (VCSEL), in which growth induced inhomogeneities are of particular importance. It relies only on a standalone laser with a narrow-bandwidth passive filter avoiding the need for an expensive tunable laser or high-resolution spectrometer.
authors.affiliation: SUPA and Department of Physics, University of Strathclyde, Glasgow, UK. thorsten.ackemann@strath.ac.uk
authors.forename: T
authors.initials: T
authors.lastname: Ackemann
authors.forename: N
authors.initials: N
authors.lastname: Radwell
authors.forename: Y
authors.initials: Y
authors.lastname: Noblet
authors.forename: R
authors.initials: R
authors.lastname: Jäger