Interferometric study of electronic changes in the refractive index of a Nd:YAG laser crystal caused by intense pumping
- Institute of Applied Physics, Russian Academy of Sciences, Moscow (Russian Federation)
Changes in the refractive index of a Nd:YAG laser crystal caused by intense pumping are measured using a polarisation interferometer. A significant electronic component in the refractive-index changes associated with the excitation of the {sup 4}F{sub 3/2} electronic level of Nd{sup 3+} ions is revealed in the crystal pumped by 808-nm radiation of a pulsed diode array. An appreciable increase in the electronic component of the refractive index, which is caused by the population of the {sup 2}F(2){sub 5/2} high-energy level, is observed in a Nd:YAG crystal additionally pumped by a 266-nm laser beam. Analytic calculations show that the short-wavelength 4f-5d transitions provide a predominant contribution to the polarisability of excited Nd{sup 3+} ions at the 1064.2-nm lasing transition. (active media)
- OSTI ID:
- 21470400
- Journal Information:
- Quantum Electronics (Woodbury, N.Y.), Vol. 33, Issue 10; Other Information: DOI: 10.1070/QE2003v033n10ABEH002515; ISSN 1063-7818
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CRYSTALS
ELECTRONIC STRUCTURE
ENERGY LEVELS
EXCITATION
INTERFEROMETERS
NEODYMIUM IONS
NEODYMIUM LASERS
PHOTON BEAMS
POLARIZABILITY
POLARIZATION
PUMPING
REFRACTIVE INDEX
WAVELENGTHS
BEAMS
CHARGED PARTICLES
ELECTRICAL PROPERTIES
ENERGY-LEVEL TRANSITIONS
IONS
LASERS
MEASURING INSTRUMENTS
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
SOLID STATE LASERS