POPOP vapor laser with a 22% efficiency
Ether vapor at a pressure of 35 atm increased the equilibrium density of POPOP molecules in vapors by a factor of 100. When a mixture of POPOP vapor and ether was pumped by the third harmonic of a neodymium laser (355 nm), a lasing efficiency higher than 22% was obtained, this being comparable with the lasing efficiency of POPOP molecules in solutions. The low threshold intensity for excitation of laser action (I/sub th/<0.3 MW/cm/sup 2/) when pumped by the fourth harmonic (266 nm) indicated that wide-band incoherent light sources can be used to pump POPOP vapor. For comparison, measurements were made of the lasing efficiency of lasers utilizing solutions of POPOP in dioxane (38%) and ether (50%). The fact that POPOP molecules retain their lasing properties at elevated temperatures also makes these potentially useful for solid-state lasers with porous matrices and for dye-aerosol lasers.
- Research Organization:
- P. N. Lebedev Physics Institute, Academy of Sciences of the USSR, Moscow
- OSTI ID:
- 6019718
- Journal Information:
- Sov. J. Quant. Electron. (Engl. Transl.); (United States), Journal Name: Sov. J. Quant. Electron. (Engl. Transl.); (United States) Vol. 11:7; ISSN SJQEA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
420300* -- Engineering-- Lasers-- (-1989)
AZOLES
DATA
DYE LASERS
EFFICIENCY
EMISSION
ENERGY-LEVEL TRANSITIONS
ETHERS
EXPERIMENTAL DATA
GAS LASERS
HETEROCYCLIC COMPOUNDS
INFORMATION
LASERS
LIQUID LASERS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
OXAZOLES
POPOP
STIMULATED EMISSION