Opportunity at National Institute of Standards and Technology (NIST)
Time-Resolved Spectroscopy for Enabling Dynamic Metrology
Physical Measurement Laboratory, Sensor Science Division
Please note: This Agency only participates in the February and August reviews.
|Douglass, Kevin O
Our lab focuses on the development of novel technologies for enabling record-setting diode laser based spectroscopic measurements. The aim of this research is to develop high speed, high sensitivity spectroscopic tools to enable time-resolved measurements of rapid changes in physical quantities such as pressure, concentration, and temperature. The time scale of the dynamics ranges from a microsecond to milliseconds. The need for these tools arises because the current standards used for high precision and accuracy measurements only operate under static conditions. We are developing an approach for creating a standard for the dynamic measurement of pressure based on the measurement of fundamental quantum properties of molecular systems. From the linewidth and intensities of ro-vibrational transitions we plan on making an accurate determination of pressure and temperature. The goal is to achieve an absolute uncertainty for dynamic changes in pressure of 5% (linewidths determined to within 30 MHz) with a measurement rate of 100 kHz, which will in the future serve as a method for the traceable calibration of pressure sensors used in transient processes.
Douglass KO, et al: "Rapid scan absorption spectroscopy using a waveform-driven electro-optic phase modulator in the 1.6-1.65 μm region." Journal of the Optical Society of America B 30(10): 2696-2703, 2013
Truong GW, et al: "Frequency-agile, rapid scanning spectroscopy." Nature Photonics 7: 532-534, 2013
Spectroscopy; Sensors; High-resolution continuous wave; Quantum chemistry; Vibrational; Dynamic;
Open to U.S. citizens
Open to Postdoctoral applicants