A monolithic fully-integrated interferometer position/displacement sensor is proposed. The device is implemented with waveguide grating components, a GRIN SCH SQW DFB laser and photodiodes. A prototype device of 6.5/spl times/2.0 mm/sup 2/ chip size and 0.4/spl times/0.4 mm/sup 2/ sensing beam aperture is fabricated, and the sensor operation of submicron resolution is demonstrated.>
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Suhara et al. (1995) studied this question.
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