Ultra-broadband hybrid infrared laser system

Influence of multi-line CO laser focusing on broadband sum-frequency generation

“…A development of mid-IR lasers is very important for gas analysis, laser chemistry, medical and other applications [1]. A carbon monoxide laser (CO laser) is a unique gas laser that can operate in mid-IR on hundreds rotational-vibrational transitions in the wavelength interval from 4.6 [2] to 8.7 μm [3] in a single-lineor multi-line mode simultaneously emitting dozens of spectral lines (see, for instance [4]). Rich spectrum and high power of CO laser make it very attractive for covering mid-IR range by frequency conversion of CO laser radiation in non-linear crystals.…”

“…Rich spectrum and high power of CO laser make it very attractive for covering mid-IR range by frequency conversion of CO laser radiation in non-linear crystals. For instance, a laser system consisting of CO and CO2 lasers and non-linear crystals operating within wavelength range from 2.5 to 16.6 μm was developed [4]. Such IR laser source would be useful in a variety of researches and applications including gas analysis and the atmosphere sensing [5].…”

Sum frequency generation under conversion of Q-switched cryogenic slab RF discharge CO laser radiation in ZnGeP2

“…It should be noted that the gas pressure of 50 Torr at cryogenic temperature (gas density ~0.2 Amagat, that is one-fifth of the atmospheric density under normal conditions) provides sufficient gain bandwidth to obtain 5-10 ns mode-locked laser pulses as in [9,10]. Therefore, the repetitively pulsed Q-switched slab RF discharge CO laser is fairly attractive for developing a mid-IR high-pressure molecular laser system producing frequency converted broadband radiation (similar to [5,17]) and having much better compactness as compared to the CO laser with an external ionizing source applied in [9,10] for the same purpose.…”

THz sources based on frequency conversion of multi-line molecular lasers in nonlinear crystals and on optically pumped molecular lasers

“…The most close to the tasks of the project are the results of generation of the sum and difference frequencies of CO and CO 2 laser emission in nonlinear GaSe and AgGaSe 2 crystals [13,16], as well as PbIn 6 Te 10 [17] into wavelength interval from 2.5 to 16.6 µm. A large number (more than 1000) of the spectral lines of a CO laser makes it possible to realize single-stage frequency converters by generating the difference frequencies of both bands (fundamental and first-overtone) and covering the long-wave part of the mid-IR band up to 30 µm.…”