PATENT CLAIM ANALYSIS

Application Number: 15762003
Application Type: Utility
Filing Date: 2018-03
Publication Date: 2018-09
Patent Classification: ["372", "020000"]

Abstract:
A configuration of a DFB laser-based wavelength tunable laser is well known, but long resonators have difficulty in forming uniform resonators due to production variations, thereby inducing limitation in narrowing the spectral linewidth in the DFB laser-based wavelength tunable laser as well. In the semiconductor laser device of the present invention, a semiconductor laser that oscillates in a single mode and a low-loss lightwave circuit using SiO 2  glass are arranged on the common substrate. The lightwave circuit is configured such that part of output light from the semiconductor laser propagates through a certain length of an optical path, and then is reflected by a reflector and is fed back to the semiconductor laser. Output light from the semiconductor laser and an input waveguide of the lightwave circuit can also be configured to be optically connected directly to each other. The present invention can provide a compact laser device with a narrowed spectral linewidth and stable wavelength controllability.

Claim (Index 5):
The semiconductor laser device according to  claim 1 , wherein the output light from the semiconductor laser on the first substrate and the input waveguide of the lightwave circuit on the second substrate are coupled between an end face of the first substrate and an end face of the second substrate that faces the end face of the first substrate.

Metadata:
- Claim Count in Document: 4.0
- Percentile: 90.0
- Lexical Diversity: 1.7957
- Patent Class: 372.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['13280709', '15074556', '15297411', '13225155', '13701703']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.834343990597125
- 35 USC 102 Novelty (BERT): 0.505443726976005
- Combined Prediction Score: 0.801453964235013
- Mean Citation Score: 261.59736200000003
- Max Citation Score: 278.9014
- Similarity Product: 229.85770981395245

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