PATENT CLAIM ANALYSIS

Application Number: 15922611
Application Type: Utility
Filing Date: 2018-03
Publication Date: 2019-04
Patent Classification: ["372", "050110"]

Abstract:
A structure of distributed feedback (DFB) laser includes a grating layer having a phase-shift grating structure and a gratingless area. In addition, both side-surfaces of the DFB laser are coated with anti-reflection coating to improve SMSR and to obtain good slope efficiency (SE). The grating layer is divided by the phase-shift grating structure in a horizontal direction into a first grating area and a second grating area adjacent to a laser-out surface of the DFB laser. The phase-shift grating structure provides a phase-difference distance, such that a shift of phase exists between the micro-grating structures located within the first grating area and the other micro-grating structures located within the second grating area. The gratingless area located within the second grating area contains no micro-grating structure, and moreover, the gratingless area will not change the phase of the micro-grating structures located within the second grating area.

Claim (Index 14):
The method for fabricating a distributed feedback laser of  claim 10 , wherein the grating layer with the total width has a coupling strength \u03baL within 2\u02dc5, the first grating area has a first coupling strength, the second grating area excluding the gratingless area has a second coupling strength, the gratingless area has a third coupling strength, the first coupling strength is larger than the second coupling strength, the second coupling strength is larger than the third coupling strength, and the third coupling strength is equal to 0.

Metadata:
- Claim Count in Document: 1.0
- Percentile: 90.0
- Lexical Diversity: 2.22535
- Patent Class: 372.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['14182335', '15145951', '13614280', '10636103', '12435562']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8279625739046552
- 35 USC 102 Novelty (BERT): 0.5113798216565665
- Combined Prediction Score: 0.7963042986798464
- Mean Citation Score: 240.690956
- Max Citation Score: 248.20692000000005
- Similarity Product: 160.73940675048354

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