title: Integrated approach to laser delivery and confocal signal detection.
abstract: We present an on-chip arrayed waveguide grating (AWG) sensor based on the confocal arrangement of two AWGs, one acting as focusing illuminator and one as signal collector. The chip can be close to, or in direct contact with, a sample, e.g., biological tissue, without the need of external optics. The collection efficiency of our device can be more than 1 order of magnitude higher than that of a standard AWG, in which light is collected by one input channel. Experimental results on the collection efficiency and volume are presented, together with a demonstration of multiwavelength imaging.
authors: Integrated Optical MicroSystems Group, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands. n.ismail@ewi.utwente.nl
authors: Nur
authors: N
authors: Ismail
authors: Bakiye Imran
authors: BI
authors: Akca
authors: Fei
authors: F
authors: Sun
authors: Kerstin
authors: K
authors: Wörhoff
authors: René M
authors: RM
authors: de Ridder
authors: Markus
authors: M
authors: Pollnau
authors: Alfred
authors: A
authors: Driessen
mesh_terms: D007834:Lasers; D008027:Light; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*; D018511:Systems Integration