US Patent Application 18139589. SYSTEM, APPARATUS, AND METHOD FOR ONLINE DISTRIBUTED POLARIZATION-DEPENDENT LOSS MONITORING simplified abstract
Contents
SYSTEM, APPARATUS, AND METHOD FOR ONLINE DISTRIBUTED POLARIZATION-DEPENDENT LOSS MONITORING
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SYSTEM, APPARATUS, AND METHOD FOR ONLINE DISTRIBUTED POLARIZATION-DEPENDENT LOSS MONITORING - A simplified explanation of the abstract
This abstract first appeared for US patent application 18139589 titled 'SYSTEM, APPARATUS, AND METHOD FOR ONLINE DISTRIBUTED POLARIZATION-DEPENDENT LOSS MONITORING
Simplified Explanation
The patent application describes a method for measuring polarization-dependent loss (PDL) in an optical link segment.
- The method involves measuring the powers of two pilot tones (PTs) in a polarization-multiplexed (PM) optical signal at the input and output ends of the optical link segment.
- The PM optical signal consists of two optical signals with orthogonal polarizations, each amplitude-modulated by one of the PTs.
- The first step is to measure the powers of the PTs at the first link location and calculate the first orthogonal polarization power ratio (OPPR) between them.
- Next, the powers of the PTs are measured at the second link location and the second OPPR is calculated.
- Finally, the PDL of the optical link segment is determined by comparing the first and second OPPRs.
Original Abstract Submitted
A method for measuring polarization-dependent loss (PDL) of an optical link segment. The method has the steps of: measuring powers of first and second pilot tones (PTs) in a polarization-multiplexed (PM) optical signal at first and second link locations at or about an input and an output end of the optical link segment, respectively, the PM optical signal having first and second optical signals with orthogonal polarizations and amplitude-modulated by the first and second PTs, respectively; calculating a first orthogonal polarization power ratio (OPPR) of the first and second PTs using the powers thereof measured at the first link location; calculating a second OPPR of the first and second PTs using the powers thereof measured at the second link location; and calculating the PDL of the optical link segment based on a comparison between the first and second OPPRs.
