Gain and transient absorption profiles for the iodine monofluoride 490-nm and iodine monochloride 430-nm bands under discharge excitation

Journal Article · Wed Apr 01 04:00:00 EST 1981 · Appl. Phys. Lett.; (United States)

DOI:https://doi.org/10.1063/1.92428· OSTI ID:6589129

Dlabal, M L; Eden, J G

The optical gain and transient absorption spectra for the IF 490-nm and ICl 430-nm bands have been measured in discharge-excited He, CF/sub 3/I and NF/sub 3/ or CCl/sub 4/ gas mixtures using a flashlamp---pumped, tunable dye laser. For the IF blue-green band, gain in excess of 1.0% cm/sup -1/ was observed over the entire 479--498-nm wavelength interval. Peak optical gain coefficients of approx.3.0% cm/sup -1/ and 1.3% cm/sup -1/ were observed for IF at 490.7 nm and ICl at 431.3 nm, respectively. For both molecules, strong absorption in the vicinity of the wavelength of maximum gain was identified as being due to the He (2p/sup 1/P/sub 1/) excited species. The addition of Ne or Ar to the gas mixture was found to substantially reduce the He (/sup 1/P/sub 1/) density, thereby improving the IF small-signal gain-to-absorption ratio as well as the temporal width of the gain pulse.

• Research Organization: Department of Electrical Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801
• OSTI ID: 6589129
• Journal Information: Appl. Phys. Lett.; (United States), Journal Name: Appl. Phys. Lett.; (United States) Vol. 38:7; ISSN APPLA
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420300* -- Engineering-- Lasers-- (-1989)
ABSORPTION
CARBON TETRACHLORIDE
CHLORIDES
CHLORINATED ALIPHATIC HYDROCARBONS
CHLORINE COMPOUNDS
DISTRIBUTION
DYE LASERS
ELECTRIC DISCHARGES
ELECTRON TUBES
ELEMENTS
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITATION
EXCITED STATES
FLASH TUBES
FLUIDS
FLUORIDES
FLUORINE COMPOUNDS
GAIN
GAS DISCHARGE TUBES
GAS LASERS
GASES
HALIDES
HALOGEN COMPOUNDS
HALOGENATED ALIPHATIC HYDROCARBONS
HELIUM
IODINE CHLORIDES
IODINE COMPOUNDS
IODINE FLUORIDES
LASERS
NITROGEN COMPOUNDS
NITROGEN FLUORIDES
NONMETALS
OPTICAL PUMPING
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
PUMPING
RARE GASES
SPATIAL DISTRIBUTION
SPECTRA
TRANSIENTS
TUNING
WAVELENGTHS