Optics: measuring and testing – Range or remote distance finding – With photodetection
Patent
1979-12-26
1982-10-19
Lee, John D.
Optics: measuring and testing
Range or remote distance finding
With photodetection
350 9634, 356 44, G02B 5172
Patent
active
043547354
ABSTRACT:
A transducer (14) including an optical fiber core (15) having a first refractive index profile, and an optical cladding (16) encircling the core and having a second refractive index profile different from that of the profile of the optical core. At least one of the core and cladding is formed of a photoresponsive material providing a variable difference between the refractive indices of the core and cladding as a function of a physical effect applied to the transducer. Light may be propagated through the core from a suitable light source (18) and the light which is lost from the core to the cladding may be detected by a suitable detector (22,23) providing an output signal corresponding to the force applied to the transducer. In one form, the detector receives light from the end (21) of the transducer, and in another form, the detector (23) receives light through the outer surface (24) of the transducer.
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Brandt et al., "Bulk Acoustic Wave Interaction with Guided Optical Waves", A.P.L., vol. 23, No. 2, Jul. 1973, pp. 53-54.
Kingsley., "Optical-Fibre Phase Modulator", Electronics Letters, vol. 11, No. 19, Sep. 1975, pp. 453-454.
Gfeller et al., "Modulator and Tap for Optical Fiber Systems", IBM Tech. Discl. Bull., vol. 21, No. 5, Oct. 1978, pp. 2014-2015.
Bucaro, "Optical Fiber Acoustic Sensors", Conference: Fiber Optics Advances in Research & Devel., Kingston, R.I., Jun. 1978, pp. 641-655.
Christian, deceased John D.
Christian, heir Albert
Christian, heir David A.
Christian, heir Martha R.
Stowe David W.
Gould Inc.
Lee John D.
Pierce Kay H.
Rowe Charles L.
Sachs Edward E.
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