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 3):
A method for obtaining common mode rejection ratio for a coherent optical receiver, including:\n a step of branching light having the measurement frequency (\u03c9 [Hz]) from a laser light source ( 3 ), and obtaining a first branched light and a second branched light; a step of receiving the first branched light and generating a first optical two-tone signal which is signal light, this first optical two-tone signal having a frequency difference (\u03c9\u2212\u0394\u03c9 [Hz]) that is lower than the measurement frequency; a step of receiving the second branched light and generating a second optical two-tone signal which is locally generated light, this second optical two-tone signal having a frequency difference (\u03c9+\u0394\u03c9 [Hz]) that is higher than the measurement frequency; and a step of measuring and analyzing a output electrical signal outputted from a coherent optical receiver ( 11 ) that is a subject of measurement of common mode rejection ratio (CMRR), and obtaining the common mode rejection ratio (CMRR) on the signal light side from an intensity ratio of an intensity I \u03c9  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 locally generated light, and an intensity I \u03c9\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: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['15203939', '15724365', '14273652', '15203957', '15724382']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7063760159266245
- 35 USC 102 Novelty (BERT): 0.5107834507177681
- Combined Prediction Score: 0.6868167594057388
- Mean Citation Score: 230.967648
- Max Citation Score: 248.81291
- Similarity Product: 196.15117956115364

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