Title :
New FIR laser lines from fully deuterated dichloromethane: completion of perpendicular/parallel emission pairs
Author :
Bertolini, Alessandro ; Carelli, Giorgio ; Moretti, Augusto ; Moruzzi, Giovanni
Author_Institution :
Dipt. di Fisica, Pisa Univ., Italy
Abstract :
We report 16 new far-infrared (FIR) laser emissions of CD/sub 2/Cl/sub 2/. These lines are obtained by optically pumping the active molecule by means of a large-tunability waveguide CO/sub 2/ laser. Our tunability of 290 MHz around each CO/sub 2/ laser emission allows for the excitation of large-offset absorption transitions of CD/sub 2/Cl/sub 2/, not reachable by conventional CO/sub 2/ Lasers. While the overwhelming majority of the known FIR laser emissions of CD/sub 2/Cl/sub 2/ are polarized parallel to the polarization of the pump CO/sub 2/ line, 13 of the 16 new lines reported in this paper are polarized perpendicularly to the corresponding CO/sub 2/ pump line. The presence of both perpendicular and parallel lines is extremely important for the assignment of laser transitions.
Keywords :
gas lasers; infrared sources; laser transitions; laser tuning; optical pumping; organic compounds; submillimetre wave lasers; waveguide lasers; CD/sub 2/Cl/sub 2/; CO/sub 2/; CO/sub 2/ pump line; FIR laser emissions; FIR laser lines; active molecule; deuterated dichloromethane; far-infrared laser emissions; fully deuterated dichloromethane; large-offset absorption transitions; large-tunability waveguide CO/sub 2/ laser; laser transitions; optically pumping; perpendicular/parallel emission pairs; pump CO/sub 2/ line; Absorption; Finite impulse response filter; Laser excitation; Laser transitions; Optical pumping; Optical waveguides; Polarization; Pump lasers; Stimulated emission; Waveguide lasers;
Journal_Title :
Quantum Electronics, IEEE Journal of
