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 6):
Apparatus for detecting trace gas species in a gas sample using cavity ringdown spectroscopy, comprising:\n a high power, multimode Fabry-Perot semiconductor laser system with a broad wavelength range generates at least one laser beam pulse; a high finesse optical cavity cell in which the sample gas is located; a reflector for directing the laser beam on axis into the cavity cell; a photodetector for detecting the decay of the light pulse exiting the cavity upon termination of each pulse; and a processor for using the time constant of the decay to determine a concentration of a target molecular species in the gas sample.

Metadata:
- Claim Count in Document: 3.0
- Percentile: 91.0
- Lexical Diversity: 1.50442
- Patent Class: 356.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['11558445', '13026011', '10332924', '10188541', '12041648']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7090365525848034
- 35 USC 102 Novelty (BERT): 0.4858373172816422
- Combined Prediction Score: 0.6867166290544873
- Mean Citation Score: 227.681866
- Max Citation Score: 258.53183
- Similarity Product: 224.8713636291033

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