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Monolithic chemical sensor using heterodyned sampled grating DBR lasers

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4 Author(s)
D. A. Cohen ; Dept. of Electr. & Comput. Eng., California Univ., Santa Barbara, CA, USA ; E. J. Skogen ; H. Marchand ; L. A. Coldren

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

Published in:

Electronics Letters  (Volume:37 ,  Issue: 22 )