PATENT CLAIM ANALYSIS

Application Number: 15949218
Application Type: Utility
Filing Date: 2018-04
Publication Date: 2018-10
Patent Classification: ["398", "202000"]

Abstract:
In an optical receiver, a control unit determines an SOA current set value such that an SOA current becomes a maximum value I SOA _ MAX  when a VOA voltage is smaller than a first threshold value V VOA _ LOW , determines the SOA current set value such that the SOA current becomes smaller than the maximum value I SOA _ MAX  and larger than a minimum value I SOA _ MIN  when the VOA voltage is equal to or larger than the first threshold value V VOA _ LOW  and is smaller than a second threshold value V VOA HIGH , and determines the SOA current set value such that the SOA current is fixed to the minimum value I SOA _ MIN  when the VOA voltage is equal to or larger than the second threshold value V VOA _ HIGH .

Claim (Index 1):
An optical receiver for receiving an optical reception signal, the optical receiver comprising:\n a variable optical attenuator configured to output a first optical signal obtained by attenuating the optical reception signal with an attenuation amount increasing or decreasing in accordance with a first control signal; a semiconductor optical amplifier configured to output a second optical signal obtained by amplifying the first optical signal with a gain increasing or decreasing in accordance with a second control signal; an optical receiving unit configured to convert the second optical signal into an electrical signal and output a monitor signal in accordance with the electrical signal; a comparison circuit configured to compare the monitor signal with an output set signal and generate the first control signal in accordance with a result of the comparison; and a control unit configured to generate the second control signal and the output set signal in accordance with the first control signal, wherein the comparison circuit makes the first control signal larger as a difference between the monitor signal and the output set signal becomes larger when the monitor signal is larger than the output set signal, and outputs an output value within a predetermined range as the first control signal when the monitor signal is smaller than the output set signal, the variable optical attenuator makes the attenuation amount larger when the first control signal becomes larger and makes the attenuation amount smaller when the first control signal becomes smaller, the semiconductor optical amplifier makes the gain larger when the second control signal becomes larger and makes the gain smaller when the second control signal becomes smaller, and the control unit increases the second control signal by a first increase value within a range smaller than a first upper limit value, and increases the output set signal in accordance with the first increase value within a range smaller than a second upper limit value set in accordance with the first upper limit value, when the first control signal is smaller than a first threshold value, decreases the second control signal by a first decrease value within a range larger than a first lower limit value smaller than the first upper limit value, and decreases the output set signal in accordance with the first decrease value within a range larger than a second lower limit value set in accordance with the first lower limit value, when the first control signal is larger than a second threshold value larger than the first threshold value, and maintains the second control signal and the output set signal when the first control signal falls within a range equal to or larger than the first threshold value and equal to or smaller than the second threshold value.

Metadata:
- Claim Count in Document: 3.0
- Percentile: 91.0
- Lexical Diversity: 3.45238
- Patent Class: 398.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['13049421', '12631329', '15007393', '12130123', '14850698']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.6201335097426864
- 35 USC 102 Novelty (BERT): 0.4851898103067226
- Combined Prediction Score: 0.60663913979909
- Mean Citation Score: 171.77303
- Max Citation Score: 180.62628
- Similarity Product: 152.01238586171866

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

Dataset: test