PATENT CLAIM ANALYSIS

Application Number: 15960315
Application Type: Utility
Filing Date: 2018-04
Publication Date: 2018-10
Patent Classification: ["356", "437000"]

Abstract:
A highly sensitive trace gas sensor based on Cavity Ring-down Spectroscopy (CRDS) makes use of a high power, multi-mode Fabry-Perot (FP) semiconductor laser with a broad wavelength range to excite a large number of cavity modes and multiple molecular transitions, thereby reducing the detector's susceptibility to vibration and making it well suited for field deployment. The laser beam is aligned on-axis to the cavity, improving the signal-noise-ratio while maintaining its vibration insensitivity. The use of a FP semiconductor laser has the added advantages of being inexpensive, compact and insensitive to vibration. The technique is demonstrated using a laser with an output power of at least 200 mW, preferably over 1.0 Watt, (λ=400 nm) to measure low concentrations of Nitrogen Dioxide (NO 2 ) in zero air. For single-shot detection, 530 ppt sensitivity is demonstrated with a measurement time of 60 μs which allows for sensitive measurements with high temporal resolution.

Claim (Index 8):
The apparatus of  claim 4  wherein a narrow bandpass filter is used to block fluorescence originating from the interaction of the high-power laser light and the glass substrates of the optical elements (e.g., the cavity ringdown mirrors), from interfering with the transmitted signal from the high finesse optical cavity, as necessary.

Metadata:
- Claim Count in Document: 3.0
- Percentile: 91.0
- Lexical Diversity: 1.50442
- Patent Class: 356.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: False
- Related Applications: ['11558445', '13026011', '10332924', '10188541', '12041648']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7303197979792032
- 35 USC 102 Novelty (BERT): 0.5037963428459263
- Combined Prediction Score: 0.7076674524658755
- Mean Citation Score: 227.681866
- Max Citation Score: 258.53183
- Similarity Product: 178.89423392846228

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