Technology

Nobel Prize-winning laser technology powers our continuous monitoring solution

LongPath’s
Technology

Frequency Comb Laser

The core laser technology in the LongPath system was the basis of Nobel Prize-winning work at the University of Colorado and the National Institute of Standards and Technology.  Our eye-safe, long-path laser systems probe the distinct absorption ‘fingerprint’ of many different molecules (methane, H₂S, CO₂, H₂O, and more) across 50,000+ wavelengths (colors) of light.

The LongPath team has been working with the technology for almost a decade – first engineering the laser to achieve low system cost and field robustness, and then developing a methodology for long-distance gas detection. LongPath, CU Boulder, and NIST engineers were the first ever to make outdoor fielded measurements using this groundbreaking technology.

See Publications

Inversion

The result is parts-per-billion accuracy and precision with no calibration and strong interference rejection over long-distance (2.5+ miles) laser beam paths. Coupled with our proprietary atmospheric modeling and inversion techniques, we’re able to detect, locate, and quantify even the smallest emission sources across dozens of facilities over areas exceeding 20 square miles.

The dual-frequency comb laser measures trace gas absorption over arrays of long-distance beam paths. Time-resolved trace gas concentrations are determined from fits to the absorption spectra with ppb-km sensitivity and stability. Finally, a coupled atmospheric transport model and inversion algorithm deliver time-resolved emission rates for each location, in real time.

validation

LongPath has completed both round 1 (R1) and round 2 (R2) blind-testing protocols at the Methane Emissions Technology Evaluation Center (METEC) at Colorado State University. The center and protocols were established by the Department of Energy’s Advanced Research Projects Agency (ARPA-E) to evaluate methane monitoring technologies. LongPath tested 30+ leak scenarios with 100% True Positive and 100% True Negatives detecting all leaks greater than 5 scfh. LongPath’s performance was excellent, not only detecting leaks but also quantifying >90% of leaks down to less than 10 scfh (approximately 0.2 Mcfd or 0.2 kg/hr) from a distance of nearly 1mile.

See the System in Action

Peer-Reviewed Publications

Our technology is discussed in peer reviewed journals, the most reputable oil & gas media outlets, and more. Read on to get the latest news on LongPath Technologies.

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Minimize Emissions.
Maximize Returns.
Execute ESG & RSG goals.

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