Optical absorption and stimulated emission of neodymium in yttrium orthosilicate
Abstract
A spectroscopic investigation of the biaxial crystal yttrium orthosilicate doped with Nd(3+) (Nd3:Y2Si05) has been performed. Spectrally and orientationally resolved emission cross sections necessary for the evaluation of laser performance on the Nd(3+) 4F(3/2)-4I(9/2) and 4F(3/2)-4I(11/2) transistions have been determined. The Judd-Ofelt theory has been applied to measured values of optical absorption line strengths to obtain the orientation-averaged intensity parameters: Omega2 = 3.34 x 10 to the -20th sq cm, Omega4 = 4.35 x 10 to the -20th sq cm, and Omega6 = 5.60 x 10 to the -20th sq cm. These Judd-Ofelt intensity parameter values are significantly different from those previously reported by Tkachuk et al (1986). Using these intensity parameters, the Nd(3+) 4F2 metastable state lifetime is predicted to be 225 microsec. Measured low Nd concentration 4F(3/2) lifetimes of 214 microsec indicate a high radiative quantum efficiency.
- Publication:
-
IEEE Journal of Quantum Electronics
- Pub Date:
- August 1990
- DOI:
- 10.1109/3.59689
- Bibcode:
- 1990IJQE...26.1405B
- Keywords:
-
- Doped Crystals;
- Electromagnetic Absorption;
- Light Transmission;
- Neodymium Lasers;
- Stimulated Emission;
- Yttrium Compounds;
- Absorption Spectra;
- Metastable State;
- Refractivity;
- Silicates;
- Lasers and Masers