مرکز منطقه ای اطلاع رساني علوم و فناوري - New Terahertz Laser Lines From <formula formulatype="inline"> <img src="/images/tex/18672.gif" alt="^{13}{\\hbox {CD}}_{3}{\\hbox {OH}}"> </formula> Pumped by Regular and Hot Bands <formula formulatype="inline"> <img src="/images/tex/18673.gif" alt="{\\hb

Title :

New Terahertz Laser Lines From $^{13}{\\hbox {CD}}_{3}{\\hbox {OH}}$ Pumped by Regular and Hot Bands ${\\hb</div> </div> <div class='row'> <div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>Author : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>Moretti, A. ; Moruzzi, G. ; Strumia, F. ; Moraes, J.C.S. ; Carelli, G.</div> </div> <div class='row'> <div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>Author_Institution : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>CNR, Univ. di Pisa, Pisa</div> </div> <div class='row'> <div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>Volume : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>44</div> </div> <div class='row'> <div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>Issue : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>11</div> </div> <div class='row'> <div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>fYear : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>2008</div> </div> <div class='row'> <div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>Firstpage : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>1104</div> </div> <div class='row'> <div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>Lastpage : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>1106</div> </div> <div class='row'> <div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>Abstract : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>We have used our new pulsed CO<sub>2</sub> laser, operating both on regular and hot bands, to excite the <sup>13</sup>CD<sub>3</sub>OH methanol isotopomer. This has lead to the observation of 13 new high-threshold far-infrared laser emissions (also identified as terahertz laser lines), with frequencies in the range between 24.11 and 102.56 cm<sup>-1</sup> (0.72-3.07 THz). The absorption transitions leading to these new FIR laser emissions have been located by observing the optoacoustic absorption spectra around the CO<sub>2</sub> emissions. Here, we present these new far-infrared laser lines, characterized in wavelength, polarization, offset relative to the center of the pumping CO<sub>2</sub> laser transition, relative intensity, and optimum operation pressure.</div> </div> <div class='row'> <div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>Keywords : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>gas lasers; infrared spectra; optical pumping; CO<sub>2</sub>; CO<sub>2</sub> laser; far-infrared laser; optical pumping; optoacoustic absorption spectra; terahertz laser; Finite impulse response filter; Gas lasers; Laser excitation; Laser transitions; Laser tuning; Optical pulses; Power lasers; Pulsed power supplies; Pump lasers; Waveguide lasers; <formula formulatype=$ ${^{13}}{hbox {CD}}_{3}{hbox {OH}}$; far-infrared lasers; terahertz lasers;