Ion I. Agârbiceanu
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Ion I. Agârbiceanu (6 January 1907 – 9 March 1971) was a Romanian physicist born in
Bucium The ''bucium'' (, also called ''trâmbiţă'' or ''tulnic'') is a type of alphorn used by mountain dwellers and by shepherds in Romania and Moldova. The word is derived from Latin '' bucinum'', originally meaning "curved horn", an instrument ...
, Alba County in Transylvania. He was the son of the writer and Greek-Catholic priest
Ion Agârbiceanu Ion Agârbiceanu (first name also Ioan, last name also Agărbiceanu and Agîrbiceanu; September 12, 1882 – May 28, 1963) was an Austro-Hungarian-born Romanian writer, journalist, politician, theologian and Greek-Catholic priest. Born among the ...
and his wife Maria."Ion I. Agârbiceanu (1907–1971): Cercetător și inventator în domeniul luminii polarizate și al laserelor"
at the Physics Faculty of the Polytechnic University of Bucharest site
After completing his secondary education at the George Barițiu High School in Cluj, Agârbiceanu studied from 1925 to 1929 at the Electrotechnic Institute of Bucharest. He then pursued his studies at the University of Paris, where he obtained in 1934 his Ph.D. in Physics under the direction of
Aimé Cotton Aimé Auguste Cotton (9 October 1869 – 16 April 1951) was a French physicist known for his studies of the interaction of light with chiral molecules. In the absorption bands of these molecules, he discovered large values of optical rotator ...
; his thesis, ''Recherche sur le spectre de fluorescence et d'absorption des vapeurs de Iodine'', was published in . From 1951 to 1955 he was a professor in the Faculty of Mathematics and Physics of the University of Bucharest, after which he transferred to the Polytechnic Institute of Bucharest. He invented the gas laser in 1962, the first major improvement on laser technology, which was discovered by
Theodore Maiman Theodore Harold Maiman (July 11, 1927 – May 5, 2007) was an American engineer and physicist who is widely credited with the invention of the laser.Johnson, John Jr. (May 11, 2008). "Theodore H. Maiman, at age 32; scientist created the first LA ...
. Agârbiceanu's laser used a mixture of helium and neon to function. This laser was invented during Agârbiceanu's long tenure as head of Physics Lab 1 at the Polytechnic Institute of Bucharest, which lasted from 1955 to 1971. He was elected a corresponding member of the Romanian Academy in 1963.Membrii Academiei Române din 1866 până în prezent
at the Romanian Academy site
Agârbiceanu died in Cluj on 9 March 1971, a scant few months after he stopped working for the Polytechnic Institute of Bucharest.


Notes

{{DEFAULTSORT:Agarbiceanu, Ion I. 1907 births 1971 deaths People from Alba County Politehnica University of Bucharest alumni University of Paris alumni Academic staff of the University of Bucharest Academic staff of the Politehnica University of Bucharest Romanian physicists 20th-century Romanian inventors Corresponding members of the Romanian Academy