title: Array of grating-fiber couplers.
abstract: Along a single-mode fiber a number M of grating-fiber couplers are fabricated at equal spacings L(0). The fiber is coiled so that the couplers lie side by side, forming a planar optical antenna array. With varying optical frequency the resulting radiation lobes sweep slowly along the meridional direction but fast along the orthogonal azimuthal direction. In a spectrometer-type setup with M = 3 and L(0) = 300 mm a frequency resolution of 230 MHz is demonstrated.
authors.forename: M
authors.initials: M
authors.lastname: Zürn
authors.forename: R
authors.initials: R
authors.lastname: Ulrich