PATENT CLAIM ANALYSIS

Application Number: 16223853
Application Type: Utility
Filing Date: 2018-12
Publication Date: 2019-06
Patent Classification: ["398", "065000"]

Abstract:
An optical IQ demodulator that does not require a power-consuming DSP is disclosed. A DC offset is added to one of the I and Q optical signal components at an IQ transmitter. After mixing with an LO signal and differential detection at the receiver, this DC offset results in a heterodyne-frequency tone in each of the quadrature detection channels of the receiver. The phase of this oscillation is recovered using a PLL circuit, which output is used to separate the transmitter I and Q channels for decoding thereof using conventional electronics.

Claim (Index 20):
A method for coherent demodulation of quadrature-modulated (QM) light comprising two transmitter signals optically combined in quadrature, the method comprising:\n performing optical quadrature heterodyne detection of the QM light to obtain two electrical signals; detecting a heterodyne frequency (HF) tone in each of the two electrical signals so as to preserve a relative phase therebetween; and, decomposing the two transmitter signals from the two electrical signals based at least in part on the relative phase between the HF tones to obtain two decomposed transmitter signals.

Metadata:
- Claim Count in Document: 8.0
- Percentile: 98.0
- Lexical Diversity: 1.56452
- Patent Class: 398.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['15841789', '15459066', '15381388', '15810671', '14346789']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7028303112365935
- 35 USC 102 Novelty (BERT): 0.5930085450843277
- Combined Prediction Score: 0.691848134621367
- Mean Citation Score: 300.5774679999999
- Max Citation Score: 475.21732
- Similarity Product: 427.2815194876384

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

Dataset: test