Abstract: A sensor distribution network for detecting the presence of a target species comprises an optical fiber line having a first end and a second end. A light source is associated with the optical fiber line, and transmits light having two or more wavelengths along the optical fiber line from the near the first end. A detector is provided at or near the second end of the optical fiber line for measuring each wavelength of light reaching the detector. The network includes at least one sensor device located on the optical fiber line, the sensor device comprising a light reflecting member for reflecting light of a predetermined wavelength and a sensor member for receiving the reflected light. The sensor member modulates the reflected light in the presence of the target species.

Abstract: Waveguide sensors are formed on a chip package which contains at least one source and at least one detector. Simple waveguide elements are mounted on the chip. Waveguide defining elements can also be formed integrally with the chip package so that simple waveguide bodies can be inserted or removed. Various geometries of source, reference detector, and sensing detector can be produced. A liquid waveguide sensor is formed by filling a waveguide channel with a liquid reagent or reagents homogeneously dispersed in sol-gels. Sensing waveguides are made of or contain chemistries or biochemistries or are uncoated. Reference waveguides are made of or contain chemistries, biochemistries or materials which are inert to the analyte (sample) of interest. The chip geometries are such that absorption, fluorescence, and refractive index measurements can be made.

Abstract: Waveguide sensors are formed on a chip package which contains at least one source and at least one detector. Simple waveguide elements are mounted on the chip. Waveguide defining elements can also be formed integrally with the chip package so that simple waveguide bodies can be inserted or removed. Various geometries of source, reference detector, and sensing detector can be produced. A liquid waveguide sensor is formed by filling a waveguide channel with a liquid reagent.

Abstract: Waveguide sensors are formed on a chip package which contains at least one source and at least one detector. Simple waveguide elements are mounted on the chip. Waveguide defining elements can also be formed integrally with the chip package so that simple waveguide bodies can be inserted or removed. Various geometries of source, reference detector, and sensing detector can be produced. A liquid waveguide sensor is formed by filling a waveguide channel with a liquid reagent.

Abstract: In a sensor assembly, an optical fiber with a sensing region is connected at one end through a fiber guide tube to a detector housing containing a sensing detector. At the other end the fiber is connected through a fiber guide tube to a light source which has a reference detector mounted laterally thereto. The sensing and reference detectors are a matched pair of the same type. The guide tube in the source has a bevelled end which reflects a portion of light from the source to the reference detector.