The present project has as basic objective to develop highly sensitive and specific optical transducers for given chemical analytes. The sensor devices will be manufactured thtough low cost technical processes, in order to permit its wide utilization to chemical processes control in different areas, such as industrial as well as environtmental. Previous works results jave been design and manufacture of ARROW (Anti Resonant Reflecting Optical Waveguides) structures, with losses under 1.0 dB/cm, and fabrication of the first prototype of a potasium sensitive opto-chemical intefrated sensor. Following research line, the goal is to develop a new transducer that combine the advantages of prviously accomplished. Two transduction mechanisms will be analyzed on this device: amplitude modulation, dependent of the imaginary part of the refraction index from the monitored sample, and phase modulation, sensitive to real part variations of the measurand refraction index. As basic optical component ARROW structures will be used. As developement final step is intented to reach the integration of optical fiber and sensor on a single substrate, to reduce inssertion losses and to increase hardiness of the prototype. To attain the fixed object an multi-disciplinary equipment has been formed that encompasses specialists in scientific areas such as: microelectronics and integrated optics technology; optical, physical and chemical characterization, synthesis of organic compounds, design of optical structures and analytical chemistry.
|Effective start/end date||1/08/97 → 31/07/00|