NIST researchers are developing advanced frequency comb technologies for precision spectroscopy in the near- and mid-infrared regions. Their work focuses on extending the optical bandwidth of erbium fiber-based frequency combs to access key molecular absorption bands.
Key achievements include:
– Generating a supercontinuum spectrum spanning 1000-2200 nm using ultrafast pulses in highly nonlinear fiber
– Demonstrating a frequency comb spanning 2800-3500 nm using difference frequency generation in a PPLN crystal
– Employing VIPA-based and dual-comb spectroscopy techniques for analyzing frequency comb interactions with samples
The research aims to enable rapid, high-sensitivity broadband gas detection using mature erbium mode-locked fiber laser technology. The work has potential applications in environmental monitoring, industrial process control, and fundamental molecular spectroscopy studies.
Source: https://www.nist.gov/programs-projects/frequency-comb-spectroscopy
Keywords: Spectroscopy, Frequency Combs, Er Fiber, Supercontinuum, Photodiode
