Umesh Sampath

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Fiber Bragg grating sensors are placed in a fiber-optic Sagnac loop to combine the grating temperature sensors and the fiber-optic mandrel acoustic emission sensors in single optical circuit. A wavelength-scanning fiber-optic laser is used as a common light source for both sensors. A fiber-optic attenuator is placed at a specific position in the Sagnac loop(More)
The purpose of this study was to investigate the relationships among Psychological Capital (Psy-Cap), work attitudes and job performance of the employees in the banking sector in Sri Lanka. The sample consisted of 176 managers and 357 non-managerial employees. A questionnaire was administered among the employees as the measuring instrument. The collected(More)
A fiber-optic cure monitoring system is proposed to measure curing status of composite structure such as a large scale wind turbine blade. The monitoring is based on the measurement of Fresnel reflectivity at the optical fiber/epoxy resin interface. The refractive index of epoxy resin varies throughout curing stages, changing the Fresnel reflectivity. The(More)
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