Site-selection spectroscopy, energy transfer, and laser emission in Nd sup 3+ -doped Ba sub 2 MgGe sub 2 O sub 7

Journal Article · Sat Dec 15 00:00:00 EST 1990 · Journal of Applied Physics; (USA)

DOI:https://doi.org/10.1063/1.346884· OSTI ID:6112269

Ferry, M J; Kliewer, M L; Reeves, R J; Powell, R C ^[1]; Allik, T H ^[2]

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1. Center for Laser Research, Oklahoma State University, Stillwater, Oklahoma 74078-0444 (USA)
2. Science Applications International Corporation, 1710 Goodridge Drive, McLean, Virginia 22102 (USA)

A detailed spectroscopic and pump wavelength dependent laser study has been performed on Nd{sup 3+} ions in Ba{sub 2}MgGe{sub 2}O{sub 7}. Site-selection spectroscopy experiments reveal fifteen distinct crystal field sites for the Nd{sup 3+} ions. At room temperature, excitation of ions in any one of these sites is followed by efficient, thermally activated energy transfer to ions in a site having a laser emission transition at 1054 nm. Laser-pumped laser experiments were performed to determine the pumping threshold and slope efficiency of laser action in this material for different monochromatic pump wavelengths. The measured slope efficiencies were found to be pump wavelength dependent and ranged from 6% to 22%. Excited-state absorption of pump photons was shown to be responsible for this variation in the slope efficiency.

• OSTI ID: 6112269
• Journal Information: Journal of Applied Physics; (USA), Vol. 68:12; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
BARIUM OXIDES
SITE SELECTION
GERMANIUM OXIDES
MAGNESIUM OXIDES
NEODYMIUM LASERS
EFFICIENCY
CRYSTALS
EMISSION
LASER RADIATION
MEDIUM TEMPERATURE
NEODYMIUM ADDITIONS
OPTICAL PUMPING
QUATERNARY COMPOUNDS
SPECTROSCOPY
TIME RESOLUTION
ALKALINE EARTH METAL COMPOUNDS
ALLOYS
AMINES
AMMONIUM COMPOUNDS
BARIUM COMPOUNDS
CHALCOGENIDES
ELECTROMAGNETIC RADIATION
GERMANIUM COMPOUNDS
LASERS
MAGNESIUM COMPOUNDS
NEODYMIUM ALLOYS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PUMPING
RADIATIONS
RARE EARTH ADDITIONS
RARE EARTH ALLOYS
RESOLUTION
SOLID STATE LASERS
TIMING PROPERTIES
426002* - Engineering- Lasers & Masers- (1990-)