Title :
Monolithic chemical sensor using heterodyned sampled grating DBR lasers
Author :
Cohen, D.A. ; Skogen, E.J. ; Marchand, H. ; Coldren, L.A.
Author_Institution :
Dept. of Electr. & Comput. Eng., California Univ., Santa Barbara, CA, USA
fDate :
10/25/2001 12:00:00 AM
Abstract :
A chemical sensor using tandem wavelength-tunable lasers monolithically integrated with a field combiner and a photodetector is presented. The evanescent field of one laser senses small changes in refractive index due to impurities or binding of antigens, and induces a shift in the heterodyne frequency
Keywords :
chemical sensors; diffraction gratings; distributed Bragg reflector lasers; integrated optoelectronics; laser tuning; measurement by laser beam; photodetectors; refractive index; semiconductor lasers; waveguide lasers; antigens; evanescent field; field combiner; heterodyne frequency shift; heterodyned sampled grating DBR lasers; impurities; monolithic chemical sensor; photodetector; refractive index changes; ridge waveguide diode lasers; tandem wavelength-tunable lasers;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20010927
