CH3OH optically pumped by a 13CO2 laser: new laser lines and assignments

Coherence-converted population transfer FTMW-IR double resonance spectroscopy of CH3OD in the OD-stretch region

“…It is also a model for studies of intramolecular vibrational energy redistribution (IVR) [4][5][6][7]. The spectroscopy of methanol has been used as a combustion diagnostic [8,9] and has contributed to the development of optically pumped far-infrared lasers [10][11][12][13][14][15][16][17]. In addition, both the normal isotopic species and deuterated isotopomers have been detected in star-forming regions of space [18][19][20].…”

A theoretical investigation of wedged capacitive strip-grating output couplers for optically pumped terahertz lasers

“…High power (more than 1 W) continuous-wave terahertz (THz) or far-infrared (FIR) lasers have significant scientific and technological potential for a wide range of applications from diagnostics of different materials (including plasma, semiconductors, chemical compounds, biomolecules, and biotissues) [1,2], imaging (for medical and security purpose) [3], spectroscopy [4], new coherent radiation sources [5,6], to remote atmospheric sensing and monitoring, astronomy, etc. [7,8].…”

TeraHertz laser generation by optically pumped Polar Molecules

“…A 13 CO 2 laser of wide tunability (110 MHz) was used as pump source, and a Fabry-Perot open cavity was used as a FIR laser resonator.The interest on powerful sources of electromagnetic waves in the TeraHertz region (sometimes identified as Far Infrared (FIR)) for applications such as imaging and medical sciences [1][2][3][4][5], has been a strong motivation to reinvestigate CO 2 laser-pumped methanol as active medium for THz laser generation. Optical pumping of polar molecules is one the most efficient techniques to generate cw THz laser lines, and today thousands of discrete emissions, ranging 30µm (10THz) to 3mm (0.1THz), have been observed.…”

“…An accidental coincidence between a CO 2 laser emission and an infrared molecular absorption is a rather stringent condition in those experiments. The use of isotopic forms of carbon dioxide, as optical laser sources, greatly increases the possibility of those accidental coincidences.In this work we conducted a careful search for new laser lines in CH 3 OH and 13 CH 3 OH optically pumped by a sealed-off 13 CO 2 laser (Lasertch Model LT250 Laser Tube) [1,2]. A Fabry-Perot cavity was used both as an optoacoustic (OA) cell, to record the absorption transitions, and as a TeraHertz laser resonator.…”

“…In this work we conducted a careful search for new laser lines in CH 3 OH and 13 CH 3 OH optically pumped by a sealed-off 13 CO 2 laser (Lasertch Model LT250 Laser Tube) [1,2]. A Fabry-Perot cavity was used both as an optoacoustic (OA) cell, to record the absorption transitions, and as a TeraHertz laser resonator.…”