Direct measurements of the terminal laser level lifetime in neodymium-doped crystals and glasses
Journal Article
·
· Journal of the Optical Society of America, Part B: Optical Physics
- Lawrence Livermore National Laboratory, University of California, P.O. Box 808, Livermore, California 94550 (United States)
We have measured the terminal level lifetime ({tau}{sub 11/2}) for the 1-{mu}m neodymium transition in several laser media, using a novel pump (2.41-{mu}m) and probe (1.06-{mu}m) technique. This method allows us to populate the {sup 4}{ital I}{sub 13/2} level directly and subsequently to monitor the terminal level {sup 4}{ital I}{sub 11/2} population as a function of time by observing the change in integrated fluoresence of the 0.88-{mu}m emission for each time delay between the pump and the probe pulses. We developed a computer model to analyze the data and determined the upper and lower limits for the {tau}{sub 11/2} lifetime. The results for some of the materials investigated are 115--225 ps for Nd:Y{sub 3}Al{sub 5}O{sub 12}, 250--450 ps for Nd:LG-750 (phosphate glass), 535--740 ps for Nd:LG-660 (silicate glass), 896--1900 ps for Nd:YAlO{sub 3}, and 10.5--20 ns for Nd:YLiF{sub 4}. In addition, we found the lifetimes to be independent of the neodymium doping concentration for the phosphate and silicate glass samples investigated. {copyright} {ital 1995} {ital Optical} {ital Society} {ital of} {ital America}.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 124250
- Journal Information:
- Journal of the Optical Society of America, Part B: Optical Physics, Journal Name: Journal of the Optical Society of America, Part B: Optical Physics Journal Issue: 10 Vol. 12; ISSN JOBPDE; ISSN 0740-3224
- Country of Publication:
- United States
- Language:
- English
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