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 1):
A distributed feedback laser structure, applicable to generate a laser beam with a laser wavelength, comprising:\n a semiconductor-laminated structure, generating the laser beam with the laser wavelength upon receiving an electric current, emitting the laser beam from a laser-out surface located at a lateral side thereof; a grating layer, located on the semiconductor-laminated structure, including a plurality of micro-grating structures arranged in a horizontal direction, the plurality of micro-grating structures being separated to each other largely by spacing equal to one half of the laser wavelength; and, a ridge structure, located on the grating layer; wherein the grating layer includes, in the horizontal direction, a first grating area, a phase-shift grating structure, a second grating area and a gratingless area, the laser-out surface is adjacent to the second grating area, the phase-shift grating structure is located at a junction area of the first grating area and the second grating area, a width of the phase-shift grating structure provide a phase-difference distance between the micro-grating structures in the first grating area and the micro-grating structures in the second grating area, and the gratingless area containing no said micro-grating structure is located in the second grating area.

Metadata:
- Claim Count in Document: 1.0
- Percentile: 90.0
- Lexical Diversity: 2.22535
- Patent Class: 372.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['14182335', '15145951', '13614280', '10636103', '12435562']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8120731869791671
- 35 USC 102 Novelty (BERT): 0.4965286016658004
- Combined Prediction Score: 0.7805187284478304
- Mean Citation Score: 240.690956
- Max Citation Score: 248.20692000000005
- Similarity Product: 193.1652253796053

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

Dataset: test