Signal processing for passive interferometry
AssigneeThe University of Sydney
InventorsIan Bassett, John Haywood
Life of this patent
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Abstract
A method of conducting passive interferometry utilizing an optical coupler having N bidirectional input/output ports as an interferometer head, the method comprising the steps of for each of said ports, inserting an optical input signal into the port utilizing an optical network and measuring a corresponding optical output at each of the ports utilizing the optical network, forming products containing at least some of the N2 optical outputs each, wherein the products are chosen such that each of the products comprises the same network dependent factor and eliminating the network dependent factor to obtain substantially network independent measurements.
Claims15
A method of conducting passive interferometry utilizing an optical coupler having N bi-directional input/output ports as an interferometer head, the method comprising the steps of:
- for each of said ports
- inserting an optical input signal into the port utilizing an optical network and
- measuring a corresponding optical output at each of the ports utilizing the optical network;
- forming products containing at least some of the N2 optical outputs each, wherein the products are chosen such that each of the products comprises the same network dependent factor;
- and
- eliminating the network dependent factor to obtain substantially network independent measurements.
An apparatus for conducting passive interferometry utilizing an optical coupler having N bi-directional input/output ports as an interferometer head, the apparatus comprising:
- an optical network which comprises an optical input unit for inserting an optical input signal into each port and a detector unit for measuring corresponding optical outputs at each of the ports when an optical input is inserted into one of the ports;
- a processing unit arranged, in use, such that products containing at least some of the N2 optical outputs each are formed and such that the products are chosen so that each of the products comprises the same network dependent factor, and further arranged, in use, to eliminate the network dependent factor to obtain substantially network independent measurements.
Dependencies are inferred from the claim text.