Time-resolved linewidth and lineshape measurements of a pulsed optically-pumped far infrared D/sub 2/O laser

Journal Article · Tue Mar 01 04:00:00 EST 1988 · IEEE J. Quant. Electron.; (United States)

DOI:https://doi.org/10.1109/3.160· OSTI ID:7003110

Behn, R; Dupertus, M A; Krug, P A; Kjelberg, I; Salito, A S; Siegrist, M R

The spectral composition of the emission of an optically-pumped D/sub 2/O FIR laser around the 385 ..mu..m line has been measured as a function of time during the 1 ..mu..s 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 mechanisms seem to play an important role. The emission spectra have been studied as a function of instantaneous pump power and time for different D/sub 2/O pressures. Since the D/sub 2/O laser contains no frequency selective elements, multimode emission and mode competition effects lead to a complex behavior. Nevertheless an attempt is made to explain the observations on the basis of a theoretical model.

• Research Organization: Centre de Recherches en Physique des Plasmas, Ecole Polytechnique Federale de Lausanne, CH-1007 Lausanne (CH)
• OSTI ID: 7003110
• Journal Information: IEEE J. Quant. Electron.; (United States), Journal Name: IEEE J. Quant. Electron.; (United States) Vol. 24:3; ISSN IEJQA
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420300* -- Engineering-- Lasers-- (-1989)
AC SYSTEMS
ELECTROMAGNETIC RADIATION
EMISSION
ENERGY SYSTEMS
ENERGY-LEVEL TRANSITIONS
FAR INFRARED RADIATION
GAS LASERS
HEAVY WATER
HYDROGEN COMPOUNDS
INFRARED RADIATION
LASERS
LINE WIDTHS
MATHEMATICAL MODELS
OPTICAL MODES
OPTICAL PUMPING
OSCILLATION MODES
OXYGEN COMPOUNDS
POWER SYSTEMS
PULSES
PUMPING
RADIATIONS
RESOLUTION
STARK EFFECT
STIMULATED EMISSION
TIME RESOLUTION
TIMING PROPERTIES
WATER