System and Method for Measuring Linewidth of Optical Signal
AssigneesMitsubishi Electric Research Laboratories, Inc., Mitsubishi Electric Corporation
InventorsKeisuke Kojima, Toshiaki Koike-Akino, Yuichiro Horiguchi
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Abstract
A system for measuring a linewidth of an optical signal includes an optical sensor determining a set of measurements of the linewidth of the optical signal propagated over different distances. Each measurement corresponds to a different distance, and includes a white frequency modulation (FM) noise and a low frequency FM noise. The system also includes a processor for determining values of the white FM noise and the LF FM noise reducing a difference between the measurements and values of the linewidth of the optical signal calculated for the different distances with the values of the white FM noise and the LF FM noise.
Claims20
A system for measuring a linewidth of an optical signal, comprising:
- an optical sensor determining a set of measurements of the linewidth of the optical signal propagated over different distances, such that each measurement corresponds to a different distance and includes a white frequency modulation (FM) noise and a low frequency FM noise;
- and
- a processor for determining values of the white FM noise and the LF FM noise reducing a difference between the measurements and values of the linewidth of the optical signal calculated for the different distances with the values of the white FM noise and the LF FM noise.
A method for determining a linewidth of an optical signal, comprising:
- propagating the optical signal over different distances selected from a set of predetermined distances;
- measuring the linewidth of the optical signal propagated over the different distances to produce a set of measurements, each measurement corresponds to a predetermined distance from the set of predetermined distances and includes a white frequency modulation (FM) noise and a low frequency FM noise;
- and
- determining values of the white FM noise and the LF FM noise reducing a difference between the measurements and values of the linewidth of the optical signal calculated for the set of predetermined distances with the values of the white FM noise and the LF FM noise.
A system for measuring a linewidth of an optical signal, comprising:
- a waveguide for propagating the optical signal over different distances selected from a set of predetermined distances;
- an optical sensor determining a set of measurements of the linewidth of the optical signal propagated over the different distances, such that each measurement corresponds to a different distance and includes a white frequency modulation (FM) noise and a low frequency FM noise;
- and
- a processor for determining a combination of values of the white FM noise and the LF FM noise forming to values of the linewidth of the optical signal over the different distances according to the set of measurements.
Dependencies are inferred from the claim text.