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US 4,302,107 AGranted
Interferometer with a coil composed of a single mode waveguide
AssigneeSiemens Aktiengesellschaft
InventorsGerhard Schiffner, Dieter Rosenberger
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AssigneeSiemens Aktiengesellschaft
InventorsGerhard Schiffner, Dieter Rosenberger
Estimating the term…
An interferometer with a single mode optical waveguide wound in a coil, which waveguide has an end surface at each end for the acceptance of light into the waveguide and for the emitting of light that is in the waveguide, a beam dividing element for superimposing a portion of light from each of the end surfaces of the waveguide into two separate superimposed beams of light characterized by a polarizer arranged in the path of each of the superimposed beams of light for filtering the light as it is received by a beam receiver, which may be a screen or a light sensitive element such as a photo diode. The beam splitting element may be a beam splitting element having a reflective surface such as a partially reflective mirror or a beam splitting cube or may be optical directional couplers.
In an interferometer with an optical single mode waveguide wound into a coil, said waveguide having an end surface at each end for accepting light into the waveguide and for emitting light which is traveling in the waveguide, means for superimposing a portion of the light emitted from each end surface of the waveguide to form two separated superimposed beams of light, and means for receiving each of said superimposed beams of light, the improvement comprising a polarization filter being arranged between each of the means for receiving each of the superimposed beams of light and the means for forming the superimposed beams, said polarization filters being the same type and having the same orientation so that each of the superimposed beams passes through a polarization filter prior to reaching the means for receiving the beam.
Dependencies are inferred from the claim text.