Title :
On-chip microparticle detection and sizing using a dual-wavelength waveguide laser
Author :
Bernhardi, Edward H. ; van der Werf, Kees O. ; Hollink, Anton J. F. ; Worhoff, K. ; de Ridder, R.M. ; Subramaniam, Vinod ; Pollnau, Markus
Author_Institution :
Integrated Opt. Microsyst. Group, Univ. of Twente, Enschede, Netherlands
Abstract :
An integrated intra-laser-cavity microparticle sensor based on a dual-phase-shift, dual-wavelength distributed-feedback channel waveguide laser in Al2O3:Yb3+ is presented. Real-time detection and accurate size measurement of single microparticles with diameters ranging between 1 μm and 20 μm are achieved, which represent the typical sizes of many fungal and bacterial pathogens as well as a large variety of human cells. The sensing principle relies on measuring changes in the frequency difference between the two longitudinal laser modes, as the evanescent field of the dual-wavelength laser interacts with micro-sized particles on the surface of the waveguide.
Keywords :
alumina; distributed feedback lasers; laser cavity resonators; laser modes; microorganisms; optical sensors; particle size measurement; ridge waveguides; solid lasers; waveguide lasers; ytterbium; Al2O3:Yb3+; bacterial pathogens; dual-phase-shift waveguide laser; dual-wavelength distributed-feedback channel waveguide laser; dual-wavelength waveguide laser; evanescent field; fungal pathogens; human cells; integrated intra-laser-cavity microparticle sensor; longitudinal laser modes; microparticle sizing; on-chip microparticle detection; real-time detection; size 1 mum to 20 mum; size measurement; Laser excitation; Masers; Measurement by laser beam; Optical surface waves; Optical waveguides; Pump lasers; Waveguide lasers;
Conference_Titel :
Lasers and Electro-Optics Europe (CLEO EUROPE/IQEC), 2013 Conference on and International Quantum Electronics Conference
Conference_Location :
Munich
Print_ISBN :
978-1-4799-0593-5
DOI :
10.1109/CLEOE-IQEC.2013.6801533
