TIME RESOLVED LINEWIDTH AND LINESHAPE MEASUREMENTS OF A PULSED OPTICALLY PUMPED FAR INFRARED D-2 LASER
The spectral composition of the emission of an optically-pumped D-20 FIR laser around the 285 mum line has been measured as a function of time during the 1 mus pulse duration. For this purpose a multichannel heterodyne receiver comprising a Schottky barrier diode has been used providing a spectral resolution of 80 MHz. A spectral shift of the laser emission during the pulse has been observed, which is caused by the ac Stark effect, but also other methanisms seem to play an important role. The emission spectra have been studied as a function of instantaneous pump power and time for different D-20 pressures. Since the D-20 laser contains no frequency selective elements, multimode emission amd mode competition effects lead to a complex behaviour. Nevertheless an attempt is made to explain the observations on the basis of a theoretical model.
Bibliographic Reference: IEEE JOURNAL OF QUANTUM ELECTRONICS, VOL. 24, NO. 3, PP 549-557, 1988
Record Number: 1989126095900 / Last updated on: 1989-05-01
Available languages: en