Title :
Spectroscopic and laser properties of Pm3+
Author :
Shinn, Michelle D. ; Krupke, William F. ; Solarz, Richard W. ; Kirchoff, Todd A.
Author_Institution :
Lawrence Livermore Nat. Lab., California Univ., Livermore, CA, USA
fDate :
6/1/1988 12:00:00 AM
Abstract :
Some of the spectroscopic properties of the promethium ion (Pm3+) were investigated in order to assess its feasibility for laser action. The fluorescence spectra and decays from the 5 F1.2 manifolds were measured in 11 dielectric materials. The calculated peak emission cross sections are comparable to those for Nd3+ in the same hosts. For one host, a lead-indium phosphate glass, application of the Judd-Ofelt theory yielded values of radiative rates, branching ratios, and emission cross sections from the 5Fm1 manifold. Laser action at 933 and 1098 nm was observed due to the 5F1→5I5 and 5F1→5I6 transitions, respectively. The calculated thresholds for laser action were in good agreement with experiment. It is concluded that Pm lasers will perform as well as Nd lasers, but with laser operation blue-shifted to the 920-nm region
Keywords :
atomic fluorescence; laser transitions; promethium; solid lasers; 1098 nm; 933 nm; 5F1→5I5; 5F1→5I6 transitions; Judd-Ofelt theory; Pm3+; blue-shifted; branching ratios; dielectric materials; fluorescence spectra; laser properties; peak emission; radiative rates; spectroscopic properties; Gas lasers; Laser theory; Lead; Neodymium; Optical materials; Optical transmitters; Semiconductor laser arrays; Solid lasers; Spectroscopy; Wavelength conversion;
Journal_Title :
Quantum Electronics, IEEE Journal of
