PATENT CLAIM ANALYSIS

Application Number: 16080661
Application Type: Utility
Filing Date: 2018-08
Publication Date: 2019-03
Patent Classification: ["398", "202000"]

Abstract:
To provide a method and device capable of easily measuring the CMRR vs. frequency characteristics of an optical receiver. Light having a measurement frequency (ω [hz]) is split into two different paths, and a first optical two-tone signal, which is signal light and has a frequency difference (ω−Δω [hz]), and a second optical two-tone signal, which is local light and has a frequency difference (ω-Δω [hz]), are obtained and input into a coherent receiver to be measured, wherein electrical signals output from the receiver are measured to obtain both the ratio of the intensity of a signal component having the frequency ω−Δω [hz] to the intensity of a signal component having the frequency ω [hz], which corresponds to the CMRR on the signal light side, and the ratio of the intensity of a signal component having the frequency ω+Δω [hz] to the intensity of the signal component having the frequency ω [hz], which corresponds to the CMRR on the local light side.

Claim (Index 1):
A common mode rejection ratio measurement device ( 1 ) for a coherent optical receiver at a measurement frequency (\u03c9 [Hz]), comprising:\n a branch part ( 5 ) that branches light having the measurement frequency (\u03c9 [Hz]) from a laser light source ( 3 ) to obtain a first branched light and a second branched light; \n a first optical two-tone generator ( 7 ) that receives the first branched light branched by the branch part ( 5 ), and generates a first optical two-tone signal which is a signal light; \n a second optical two-tone generator ( 9 ) that receives the second branched light branched by the branch part ( 5 ), and generates a second optical two-tone signal which is locally generated light; and \n an electrical signal measurement device ( 13 ) that measures and analyzes an output electrical signal outputted from a coherent optical receiver ( 11 ) that is a subject for measurement of common mode rejection ratio (CMRR); wherein: \n the first optical two-tone signal has a frequency difference (\u03c9\u2212\u0394\u03c9 [Hz]) that is lower than the measurement frequency; \n the second optical two-tone signal has a frequency difference (\u03c9+\u0394\u03c9 [Hz]) that is higher than the measurement frequency; and \n the electrical signal measurement device ( 13 ) has a function of obtaining the common mode rejection ratio (CMRR) on the signal light side from an intensity ratio of an intensity I 107   of an electrical signal corresponding to a frequency \u03c9 [Hz] outputted as a differential component of the first optical two-tone signal which is the signal light and the second optical two-tone signal which is a locally generated light, and an intensity I w\u2212\u0394\u03c9  of an electrical signal corresponding to a frequency (\u03c9\u2212\u0394\u03c9 [Hz]) of only the first optical two-tone signal which is the signal light.

Metadata:
- Claim Count in Document: 9.0
- Percentile: 96.0
- Lexical Diversity: 2.8806
- Patent Class: 398.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15203939', '15724365', '14273652', '15203957', '15724382']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.6801974658149583
- 35 USC 102 Novelty (BERT): 0.5133141126828465
- Combined Prediction Score: 0.6635091305017472
- Mean Citation Score: 230.967648
- Max Citation Score: 248.81291
- Similarity Product: 183.5850213765752

Labels:
- Claim Label 101: 1
- Claim Label 102: 0
- Claim Label 103: 1
- Claim Label 112: 1
- Combined Label: 0
- Label 101 Adjusted: 1

Dataset: test