fabrication and characterization of polyester and acrylic polyurethane optical waveguides

a systematic study of the fabrication and characterization of planar optical waveguides based on polyester and acrylic polyurethane coatings has been made. mode effective refractive-index measurements have been made on a large number of these waveguides fabricated on glass prepared in different conditions. the results show that the mixtur..

electrochemical sensors fabricated by microelectronic techniques for biomedical applications

summary form only given. electrochemical sensors, such as dissolved oxygen, ph and pco/sub 2/ sensors, have been widely used for biomedical applications. furthermore, the sensors can be an integral part of other biosensors such as enzyme sensors. it is suggested that microelectronic fabrication processes provide a unique and promising app..

optical chemical sensors for environmental monitoring

organochlorides are major contaminants in groundwater. because of this, chloroform and trichloroethylene have been the authors' primary targets in developing optical sensors. an optrode that is sensitive to trace quantities of these two contaminants was developed. the optode is constructed by inserting a stripped 200 mu m optical fiber in..

a novel corolla-irradiating fiber optic probe for laser angioplasty

a novel fiber optic probe for laser angioplasty has been realized consisting of a cone fiber tip inserted in a quartz microcapsule. this capsule is sealed on the top by a toroidal shaped lens-structure which avoids the on-axis radiation and gives rise to a sharp corolla shaped beam. these characteristics should minimize the risk both of m..

the use of fiber optic chemical sensors (focs) in medical applications' enzyme-based systems

the potential of using enzymes as the sensing material is evaluated. emphasis has been placed on the immobilization of the enzyme on the fiber optic without loss of activity or specificity the selected enzyme for this effort is 3 alpha -hydroxysteroid dehydrogenase. it was selected with the eventual goal of analyzing bile acid concentrati..

enzyme-based fiber optic sensors

fiber optic chemical sensors capable of detecting glucose and penicillin were developed. each consists of a polymer membrane that is covalently attached to the tip of a glass optical fiber. the membrane contains the enzyme and a ph-sensitive fluorescent dye (fluorescein). a signal is produced when the enzyme catalyzes the conversion of th..

fiber optic biosensing probes for biomedically important compounds

fiber optic biosensing probes for several bioanalytes of clinical and biomedical importance are described. the development of biosensors based on immobilization of a deaminating enzyme at the tip of a fiber optic ammonia sensor is illustrated with a biosensing probe for urea. in addition, biosensors based on the direct fluorometric detect..

recent progress in optical oxygen sensing

following a brief review on the history of optical oxygen sensing, the 1988 state of probing oxygen by optical methods is discussed in terms of new methods and materials for sensor construction. promising sensing schemes include simultaneous measurement of parameters such as oxygen and carbon dioxide with one fiber, measurement of fluores..

optical fibers in medicine iii

the following topics were dealt with' medical diagnostics: fiber imaging: fiber/sensor systems and components: temperature sensors: pressure sensors: enzyme-based fiber sensors: direct spectroscopy over optical fibers: laser therapy: ir laser beams transmission: therapeutic uses of lasers and fiber systems: uv laser beams transmission: fi..

use of a fiber optic displacement probe as a surface finish sensor

a series of tests is described that correlates the output of a fiber optic-based displacement sensor with the surface finish and material characteristics of a variety of targets. nickel-plated targets with a range of surface finishes were examined, and the corresponding sensor sensitivities computed. for common machining processes, the se..