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An optical fibre angular displacement sensor employing the surface plasmon resonance effect

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A passive angular-displacement sensor with optical fibre links using absorbance wavelength modulation has been demonstrated. A simple prism and thin film is employed which exhibits surface plasmon resonance. Test results cover an 18 degree angular displacement range with resolution of about 0.5 degree, insertion loss 8dB and temperature sensitivity about 0.01 degrees per °C.

© 1988 Optical Society of America

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