Integrated approach to laser delivery and confocal signal detection.
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.
Ismail
Nur
N
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
Akca
Bakiye Imran
BI
Sun
Fei
F
Wörhoff
Kerstin
K
de Ridder
René M
RM
Pollnau
Markus
M
Driessen
Alfred
A
D007834:Lasers; D008027:Light; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*; D018511:Systems Integration