Method for determining spin characteristic parameters in spun optical fibers
AssigneePrysmian Cavi E Sistemi Energia S.R.L.
InventorLuca Palmieri
Life of this patent
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Abstract
A method of determining characteristic spin parameters of a spun optical fiber by performing optical time-domain reflectometry measurements on the fiber, so as to obtain a state of polarization spatial function from a backscattered electromagnetic field, the state of polarization spatial function being defined by a plurality of components; and processing the state of polarization spatial function. The process includes calculating a further spatial function related to the spatial first derivative of at least one of the components of the state of polarization spatial function; identifying a spatial periodicity of the further spatial function; and determining the characteristic spin parameters as a function of the spatial periodicity.
Claims11
A method of determining characteristic spin parameters of a spun optical fiber, comprising:
- performing optical time-domain reflectometry measurements on the fiber, so as to obtain a state of polarization (SOP) spatial function from a backscattered electromagnetic field, said SOP spatial function being defined by a plurality of components;
- and
- processing the SOP spatial function by:
- calculating a further spatial function related to the spatial first derivative of at least one of said components of the SOP spatial function;
- identifying a spatial periodicity of said further spatial function;
- and
- determining said characteristic spin parameters as a function of said spatial periodicity.
An apparatus for determining characteristic spin parameters of a spun optical fiber, comprising:
- a source of electromagnetic radiation optically coupled to the fiber;
- a POTDR measurement apparatus optically coupled to the fiber to obtain a state of polarization (SOP) spatial function from a backscattered electromagnetic field, said SOP spatial function being defined by a plurality of components;
- and
- a data processor for processing the SOP spatial function,
- wherein the data processor provides in output:
- a further spatial function related to the spatial first derivative of at least one of said components of the SOP spatial function;
- a spatial periodicity of said further spatial function;
- and
- said characteristic spin parameters as a function of said spatial periodicity.
An apparatus for determining characteristic spin parameters of a spun optical fiber, comprising:
- a source of electromagnetic radiation optically coupled to the fiber;
- a POTDR measurement apparatus optically coupled to the fiber to obtain a State Of Polarization (SOP) spatial function from a backscattered electromagnetic field, said SOP spatial function being defined by a plurality of components;
- and
- a data processor for processing the SOP spatial function,
- wherein the data processor comprises:
- a calculator data processing module calculating a further spatial function related to the spatial first derivative of at least one of said components of the SOP spatial function;
- an identifier data processing module identifying a spatial periodicity of said further spatial function;
- and
- a characteristic spin parameters determination data processing module determining said characteristic spin parameters as a function of said spatial periodicity.
Dependencies are inferred from the claim text.