PATENT CLAIM ANALYSIS

Application Number: 16079096
Application Type: Utility
Filing Date: 2018-08
Publication Date: 2019-03
Patent Classification: ["385", "002000"]

Abstract:
To provide a method whereby a bias voltage capable of easily realizing a required extinction ratio can be controlled by utilizing a high-extinction ratio modulator even when a generic AD converter/control board is used, and a device for realizing the method. In the present invention, the step quantity (variation quantity) ΔV of a control voltage is no more than 0.1 times the half-wave voltage V π  [V]. For example, in the case of searching for the minimum point, the light intensity is measured when a bias that is larger by the step voltage ΔV and a bias that is smaller by the step voltage ΔV are applied, the current bias voltage being used as a reference, and the bias voltage is moved toward the smaller of the measured light intensities. The process of setting the moved bias voltage as a reference, comparing the light intensities for the bias points in both neighboring positions, and changing the reference bias voltage is then repeated. A configuration may be adopted whereby ΔV then gradually decreases in accordance with a predetermined algorithm.

Claim (Index 3):
A method for adjusting a bias voltage applied to an optical modulator, including, when a half-wave voltage of the optical modulator is taken as V \u03c0  [V], and a target optical intensity for the optical modulator is taken as I T :\n a step of obtaining a first optical intensity difference V D1  that is a difference between the target optical intensity I T  and a first optical output I V11  when a first low side bias voltage V 11 , which is obtained by subtracting from a predetermined bias voltage V 0  a value that is greater than or equal to 0.001V \u03c0  [V] and less than or equal to 0.1V \u03c0  [V], is applied to the optical modulator; \n a step of obtaining a second optical intensity difference V D2  that is a difference between the target optical intensity I T  and a second optical output I V12  when a second high side bias voltage V 12 , which is obtained by adding to the predetermined bias voltage V 0  a value that is greater than or equal to 0.001V \u03c0  [V] and less than or equal to 0.1V \u03c0  [V], is applied to the optical modulator; and \n a step of employing, as a reference voltage, that bias voltage that yields a smaller optical output among the first optical intensity difference V D1  and the second optical intensity difference V D2 .

Metadata:
- Claim Count in Document: 9.0
- Percentile: 96.0
- Lexical Diversity: 1.9898
- Patent Class: 385.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['12067455', '14558880', '13754183', '12065278', '12921235']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8253282167716707
- 35 USC 102 Novelty (BERT): 0.4785124431900172
- Combined Prediction Score: 0.7906466394135053
- Mean Citation Score: 190.683056
- Max Citation Score: 202.11029
- Similarity Product: 157.04787707132343

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