Time-Wavelength Optical Sampling (TWOS) Spectrometer

uah p 17019

Docket: UAH-P-17019


Time-wavelength spectroscopy is a traditional method for fast spectral analysis. Time wavelength spectroscopy is used to analyze the composition of chemical compounds and their behaviors. This is applicable in many different fields, such as pharmacy, forensics, and environmental studies. To garner quality results from traditional time-wavelength spectroscopy, high-speed expensive equipment must be utilized.

Researchers at UAH have developed a new spectroscopic scheme known as Time-Wavelength Optical Sampling (TWOS). This scheme combines time-wavelength spectroscopy with ultrafast optical sampling to allow the use of slower, less expensive photodetectors, while providing a better signal-to-noise ratio. This new method is accomplished by measuring the cross-correlation between signal pulses and reference pulses.

Current methods of time-wavelength spectroscopy require high-speed photodetectors, as well as other expensive equipment, such as high-speed oscilloscopes. TWOS gives the ability to use slower photodetectors, and less powerful equipment. This decreases the cost of spectroscopy, while maintaining the same level of results. Cheaper options for quality spectroscopy would decrease research costs for analyzing chemicals. In addition to decreasing research costs at large institutions, TWOS also provides easier access to spectrometers due to the lower entry cost. This would allow smaller companies or departments the opportunity to use TWOS spectroscopy in their research.


  • Environmental studies
  • Pharmaceutical research
  • Forensics
  • Optical metrology
  • Spectroscopy
  • Imaging


  • Lower cost
  • Better signal to noise ratio
  • Less powerful equipment needed


  • State of Development: Prototype
  • Licensing Status: Available for licensing
  • Patent status: Patented