Sequential demultiplexing receiver for a network of optical sensors using spectrum modulation encoding
AssigneeBertin & Cie
InventorsMichel Lequime, Pierre Sansonetti
Life of this patent
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Abstract
A sequential demultiplexing receiver for a network of sensors (20) using spectrum modulation encoding, the receiver being essentially constituted by an integrated optical circuit comprising a substrate (34) that is birefringent or semiconductive on which there are formed mode couplers or mode converters (38) operating by the electro-optical effect and that are sequentially activated at high frequency to generate optical path length differences matching those of the sensors.
Claims16
A sequential demultiplexing receiver for a network of interferometer optical sensors using spectrum modulation encoding, wherein each sensor is subjected to a physical magnitude to be measured and generates an optical path length difference that is a function of the value of said magnitude, said receiver comprising:
- an integrated optical circuit having two modes selected from the group consisting of polarization modes or transverse modes;
- said circuit comprising a substrate that is birefringent or semiconductive;
- a plurality of integrated components formed on said substrate for mode coupling or mode conversion by the electro-optical effect;
- a light waveguide connecting said components in series;
- and
- means connected to each of said components for applying electrical voltages individually thereto to enable them to be activated sequentially, thus generating path length differences tuned to those of the sensors.
Dependencies are inferred from the claim text.