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(a) An example of a 500 ns laser pulse at a laser frequency around and the signal detected through a 500 MHz germanium étalon. (b) Measurements along with graphical representation of the variation in the chirp rate and system resolution across the pulse duration.
Spectra of 20 mTorr of as measured with both laser systems for the rovibrational transition in the band.
Spectra for varying pressures of gas measured using (a) the Daylight EC-QCL and (b) the Q-MACS QCL.
Spectra for varying powers in the Daylight EC-QCL (a) at a chirp rate of and (b) at a chirp rate of . The power levels correspond to the averaged power.
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