Accession Number : AD0464480


Title :   FIBER OPTIC LASER


Descriptive Note : Final technical rept.


Corporate Author : AMERICAN OPTICAL CORP SOUTHBRIDGE MA RESEARCH DIV


Personal Author(s) : Snitzer, Elias


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/464480.pdf


Report Date : May 1965


Pagination or Media Count : 76


Abstract : The problems of frequency control of a neodymium glass laser and the broadening mechanisms involved in neodymium fluorescence and laser action in glass are considered. It is found that laser emission can be obtained in narrow lines less than 0.1A wide anywhere within 130A wide interval centered about the peak emission at 1.0585A by the use of thin reflecting plates acting as wavelength sensitive mode selectors. Spontaneous emission of Nd3(+) in glass at 1.06 micron has a full width at half maximum of 180A, which is nearly independent of temperature. From time resolved spectral studies of clad rods as functions of pump power, temperature, Nd3(+) concentration, and cavity Q, it is concluded that the 180A wide line consists of overlapping ligand field split lines, the central portion of which has a half width of approximately 65A. From the hole burning observed in the time resolved spectra the homogeneous line width at room temperature is about 20A and reduces to 5A at 77 K.


Descriptors :   *LASERS , FLUORESCENCE , ATOMIC ENERGY LEVELS , NEODYMIUM , FIBER OPTICS , GLASS


Subject Categories : Lasers and Masers


Distribution Statement : APPROVED FOR PUBLIC RELEASE