Optical frequency comb
Here are some of our results on ICL comb project when I was a postdoc at Caltech (USA). The project has collaborated with Dr. Mahmood Bagheri and Dr. Lukasz Sterczewski at Microdevices Lab, NASA, JPL.
How to tell that is a comb?👀
How to tell that is a comb?👀
Each pair of neighboring comb lines produces a beating at their difference frequency. When this beat note appears narrow then a comb is formed, indicating the equidistantly spaced comb lines.
Comb is a series of narrow linewidth light sources whose lines are perfectly evenly-spaced. This is very important for ensuring all laser power can efficiently coupling into the cavity
Cavity-enhanced ICL comb spectroscopy
Cavity-enhanced ICL comb spectroscopy
Chip-scale Mid-infrared ICL (Interband cascade laser) comb
Mode-resolved Vernier CEAS (Cavity-Enhanced Absorption Spectroscopy)